Archive for August, 2014

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Mark Webber third in his Red Bull in the race won by Fernando Alonso’s Ferrari…

RB6… was the fourth car for Red Bull by modern design guru Adrian Newey, in the pantheon of design greats such as Jano, Porsche, Chapman, Barnard and others. The RB5 was the class of the back half of 2009, winning six times and placing second in the constructors championship. RB6 was an evolution of that car, and one of his best designs, up there with the Williams FW14B and McLaren MP4-13.

Red Bull attenpted to get Mercedes engines for 2010, the engine the perceived shortcoming of the package. They were unsuccessful, so the Renault RS27 was used again. This 2400cc, 90 degree, 32 valve V8 developed circa 750BHP at a rev-limited 18000RPM.

The fuel tank was larger than RB5, this change driving a host of detail changes. The chassis was a full carbon fibre and honeycomb monocoque carrying the engine as a fully stressed member, gearbox a 7 speed semi-automatic, incorporating ‘seamless shift’.

Front and rear suspension used aluminium uprights, carbon composite double wishbones, with coil springs and anti-roll bar. Pushrod (pullrod at rear) actuated multi-matic dampers.

Brembo provided the brake componentry, calipers and discs being carbon fibre, and Oz the wheels. The car weighed 620 Kg with either Sebastian Vettel or Mark Webber aboard, RB drivers unchanged from the previous year.

The car was immediately the class of the 2010 field, qualifying particularly well. Other teams had suspicions around a claimed ride-height lowering device, none were found. Later in the season the teams front wing was seen to be ‘dipping’ to produce extra downforce. The FIA then increased the loads imposed on the chassis test to eliminate this possibility, but this seemed to lessen not eradicate the suspicious ‘flexing’ of the front wing assembly. In terms of aerodynamic innovation, 2010 was the year of the ‘F-Duct’, McLarens’ clever device to stall airflow over the rear wing on straights and thereby increase top speed. Like most other teams Red Bull adopted their own solution which was effective enough to maintain the advantage their overall package had.

The cars reliability was wanting at times, Vettel in particular lost wins in Melbourne and Korea as a consequence.

Looking at the car objectively… the overall package was great, with the aerodynamic component, as is always the case with Newey cars, and the pull-rod rear suspension which endowed the car with outstanding traction, the aspects which particularly stood out.

The team would have slaughtered the opposition but for greater reliability and inter-team rivalry, the team officially at least not favouring one driver, ‘bullshit’ according to Webber and most knowledgeable pundits. Still, in my view RB are to commended for allowing the drivers to race, albeit some of the pit-to-car directions on engine and other settings favoured Vettel, not Webber, so whether they were racing on equal terms is a moot point.

It is a long time, if ever, ‘The Marquis of Queensberry’ attended a GP…and if i were a Team Owner i would definitely be imposing my will to optimise the teams’ result and ferk the drivers, and punters for that matter!

All a question of which hat one chooses to wear in these matters!

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Cutaway drawing of RB6 (Haynes)

By the time the drivers arrived in Singapore… Vettel had 2 wins and Webber 4, but Vettel came home strongly winning 3 of the final 4 rounds and with it his first World Drivers Championship from Alonso and Webber. Not the result we Aussies wanted at all. Red Bull also won the Constructors Championship.

I’ve been to Singapore many times, but not for the Grand Prix, sadly. The main images which drove this short article capture its key elements and ‘nightime nature’.

These cars have been hit with the ‘fugly’ stick to my mind but are veritable beauties compared with this years offerings.

Still the Lancia D50 had a similar inpact in 1954 so i guess controversial design in F1 is far from new, mind you the whole field looking and sounding like dogs is!

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Fernando Alonso, Ferrari F10, winner Singapore GP 2010 (Darren Heath)

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Mark Webber, winner in RB6 Monaco 2010 (Pinterest)

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Mark Webber, Monaco 2010 Red Bull RB6 Renault (Pinterest)

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The sheer joy of a Monaco victory for Mark Webber and the Red Bull team, his diving form developed in Queanbeyan…(Pinterest)

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Aerodynamic elements of chassis, barge boards, and sidepods. Red Bull RB6 (Haynes)

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Suspension elements (Haynes)

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Gear clusters (Haynes)

For those with an interest in the Technical Elements of Modern F1…

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Photo and Other Credits…

Pinterest, Darren Heath

ScarbsF1, ‘Red Bull Racing F1 Car’ Haynes

The End…


 


 

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Everyone in Victoria particularly, if you see or hear anything about Rohans car or componentry; chassis, Golf race engine, Mk9 Hewland etc please get in touch with me, many thanks, mark…

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Fantastic shot of JYS on his way to victory throwing around the ‘twitchy’ , low ‘polar moment of inertia’ Tyrrell 006…

 The win was Stewarts 25th, equalling the number of Championship wins achieved by his friend and compatriot Jim Clark.

Stewart started the season in his trusty 005 but raced 006 from the International Trophy at Silverstone , the car carrying him to 5 victories and the world title that year.

Whilst Stewart won the drivers title the manufacturers championship went to Lotus, reigning champion Emerson Fittipaldi and teammate Ronnie Petersen scrapping and taking wins between them , which, in the absence of team orders , stopped Fittipaldi winning a pair of titles ‘on the trot’…team orders, and some times their absence are not new in F1!

Lotus were not the only team with 2 ‘number ones’ that season.

Stewart had Francois Cevert as his Tyrrell teammate again ,they were close friends as well as competitors with the master freely acknowledging Cevert had his speed , and then some , that season. But Francois was a team player and knew his turn , and time would come.

Sadly, it didn’t with his death in an horrific accident in practice at Watkins Glen, the final GP of ’73.

Stewart did a couple of laps in 006/2 in the final session to try and work out what happened to Francois, pitted his car and walked away from F1, as a driver , as he had planned earlier in the season , for good.

Jackie retired with 27 championship wins from 99 races, Cevert perished not knowing he would have been Tyrrells team leader in 1974…

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Jackie Stewart leads Francois Cevert, Monaco 1973. First and fourth respectively. (Pinterest)

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Francois Cevert & Jackie Stewart in 1973 (Pinterest)

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Werner Buhrer cutaway drawing

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Photo Credits…Werner Buhrer, Michael Turner

Tailpiece…

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(Michael Turner)

 

 

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How is your beaujolais cherie? Moss victorious in his Maserati 250F from Peter Collins and Juan Fangio in a Lancia Ferrari D50,  Jean Behra 3rd in another 250F…

In fact Fangio finished equal second sharing Peter Collins D50…and equal fourth in ‘his’ D50 sharing it with Eugenio Castellotti. He also won his fourth World Championship that year. His final was won in 1957 in a 250F, giving the marque the success it well deserved, and in the nick of time too, the 250F, long lived and carefully developed as it was had peaked, the mid engined Coopers showing the future path.

Customer Grand Prix Cars for All…

Moss started his post HWM/Connaught grand prix aspirations with the family purchase of a 250F in 1954. He was scooped up by Mercedes Benz as a result of his performances in the car to drive their W196 and SLR Grand Prix and Sports Cars alongside Fangio in 1954/5, returning to the Maserati in 1956.

The fact that Maserati made available the 250F to all comers with ‘the readies’ made a big difference to grids in the mid ’50’ as competitive cars were available for the first time in relatively large numbers. The growth of Non-Championship Grands’ Prix on the Continent was in part due to the availability of the Maser and therefore grids of depth and quality.

Many drivers cut their Grand Prix teeth in the cars, the last 250F graduate grand prix driver retiree was Chris Amon, who departed F1 in 1976!

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Mid 50’s State of The Art…

Amons 500BHP Ford Cosworth powered, winged ,’slicked’, monocoque Ensign N176 was somewhat different to the front engined,  ladder framed, skinny tyred, 240 BHP Maserati in which he started his GP career in New Zealand.

The 250F was the ‘state of the art’ in the mid ’50’s. Not as avant garde as its contempories the Mercedes W196 and Lancia D50, but state of the art all the same.

Clothed in bodywork worthy of the finest Italian courtiers, to me it is the best looking front engined grand prix car of all. It epitomises everything that was, and is great about Italian design, engineering, styling and construction.

The cars performance matched its looks, it made its debut in the 1954 Argentinian Grand Prix winning the race in Fangio’s hands.The 250F won 8 Championshp Grands’ Prix in total and countless Non-Championship events in the hands of dozens of drivers through to 1960.

26 cars were built but of course many more than that exist today…

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Design & Build…

The car was designed by Gioacchino Colombo, fomerly Ferraris’ Chief Designer, and Valerio Colotti and evolved from Maserati’s A6GCM 2 Litre F1 car.

The 250F featured a multi-tubular space-frame chassis of small diameter  chrome molybdenum tubing. De Dion rear suspension was used, the De Dion tube  mounted in front of the transaxle to move weight forward within the wheelbase, lowering the cars ‘polar moment of inertia’ or in simple terms its ability to change direction. The gearbox was transversely mounted in unit with the ZF ‘slippery’ differential, and was initially 4 speed, but later became 5 from 1955.

Conventional double wishbone front suspension was used. Brakes were 13.6 inch finned alloy drums, the fuel tank mounted at the rear contained 200 litres.

The engine was a superb, torquey straight 6 cylinder, DOHC 2 valve per cylinder, twin plug unit displacing 2494cc. It was fed by 3 twin choke Weber DCO3 carburettors, twin Marelli magnetos providing the spark. The engine initially developed 240BHP, later circa 275BHP @ 8000RPM in 1957. Maserati produced a 2.5 litre V12 for the 250F in 1957, the car was tested extensively and raced once by Behra, 9 years later it won Grands’ Prix in Cooper chassis’.

The car weighed 650Kg, distributed 48/52% front to rear.  It was 4050 mm in length, had a wheelbase of 2280mm, and a width of 1980mm.

Wheels were Borrani aluminium alloy, wire spoked with centre-lock hubs, sizes  15×4.5 inches circumference/width front and 16/5.5 rear.Pirelli tyres were used by the works cars.

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Its All About Balance…

The 250F may not have been the fastest or most powerful car of its day but it was the best balanced, allowing the driver to fully exploit its potential. Stirling Moss observed ‘It steered beautifully and inclined towards stable oversteer which one could exploit by balancing it against power and steering in long, sustained drifts through corners. It rode well on the normal type of relatively smooth surfaced course, although its small coil spring and leaf spring rear end would use up available suspension movement over the bumps at the ‘Ring’.

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Historic Context…

Even though the car was not the fastest for most of this period it was still competitive every year, and raced in large numbers, it sort of ‘underachieved’ really. But a lot changed from 1954 to 1957, lets call those the 250F ‘sweet-spot’ years and those circumstances were a lot to do with its results.

In 1954 the Mercedes Benz W196 appeared and re-wrote the record book. The fuel injected, desmodromic valve actuated straight 8, space frame chassis and ‘tool-room’ quality of its design and construction put everything else into perspective. Mind you, its advantage in 1954 was maybe more to do with Fangio’s driving than the car itself. Maserati had Fangio for the first few Grands Prix, he won with the 25oF in Argentina. When Fangio went off to Benz Maserati did not have a ‘number one’ of sufficient calibre. My contention is that had Fangio driven the 250F in 1954 Maserati would have won the title. Fangio was ‘the depth’ in Mercedes team that year.

Into 1955 the Benz hit its straps, Vittorio Janos’ fabulous Lancia D50 finally appeared in Spain.It was in many ways the equal of the W196, bristing with innovation as well; V8 engine, with the engine a stressed member, very light, pannier tanks to centralise the fuel load equally throughout the race, and of superb quality.

Moss had finished 1954 as a quasi-works Maserati driver, they needed him in 1955 but he joined Mercedes.

Ascari, Lancia’s star was killed at Monza testing Mussos’ Ferrari. Shortly thereafter the sensational ‘shot-gun’ marriage of convenience was consumnated between Ferrari and Lancia when the cash-strapped Lancia, unable to fund its race program, gave its Lancia D50 cars, spares and designer Jano to Ferrari, bereft of a competitive car having stuck with its 4 cylinder F2 derived cars for way too long, and being short of cash to fund a new car in any event.

Maser had Jean Behra as their lead driver in 1955, but they needed somone quicker. In 1955 Maserati was not going to beat the Benzes, even if Moss had stayed with them.

Further change occurred when Mercedes Benz withdrew from racing as a consequence of the 1955 Le Mans disaster when one of their 300SLR sports cars driven by Pierre Levegh collided with Lance Macklins’ Austin Healey. The war was not long ago over, 80 people had been killed, Benz had achieved their short-term aims so it seemed prudent to withdraw.

Moss and Behra lead Maserati in 1956, had Moss a car which was more reliable maybe he would have won the title. Mind you, ’tis said he was hard on cars. The Lancia-Ferrari D50 was progressively bastardised by Ferrari who had a strong team of Fangio, Collins, Musso, and Castelotti. Fangio got the best out of the car, and aided by some generous sportsmanship by Peter Collins at Monza, allowing the maestro to use his car, won the title for the fourth time. Maserati were competitive throughout, the title with more luck could have been won by Moss.

In 1957 Fangio won Maserati the title they deserved despite stiff opposition from Moss in the Vanwall, now reliable and with a Colin Chapman designed chassis and Frank Costin body, very fast.

By 1958 the 250F was finally passe as a competitive mount.

As has always been the case teams need to have the best drivers, Maserati’s budget perhaps the obstacle to achieving that. My thesis is they should have won the title in 1954 with the right driver, in 1956 with more luck/reliability and in 1957 finally won the title, Fangio doing for Maserati what he had done for Mercedes in 1954/5 and Ferrari in 1956…bringing that little bit of magic, speed, intelligence and mechanical sympathy which sparates the ‘gods’ from the mere mortals.

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Superb Michael Turner painting of Moss, Monaco 1956

Finito…

Moss won the opening, Argentinian round of the 1958 season in Rob Walkers Cooper Climax, the mid-engined revolution had begun.Mike Hawthorns’ Ferrari Dino 246 was the last front engined car to win a World Championship that year, Fangio had retired, and Maserati, drowning with cash-flow difficulties, were placed into ‘Controlled Administration’ by the Italian Government.

It was all over, other than privateers achieving success in Non-Championship events, the car, for a while longer serving the same purpose to privateers as it had back in ’54…

Fangio’s 250F Virtuosity, Modena Circuit, 1957…

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Superb 1956 Bernard Cahier shot of Moss on the Monaco Quayside, late series 250F lines shown to good effect the ‘Piccolo’ of ’57 even prettier…

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Monaco GP start ’56. Front row L to R : Fangio, Moss, Eugenio Castellotti. Lancia D50,Maser 250F,Lancia D50. # 30 is jean Behra 250F, # 16 Harry Schell Vanwall VW55, # 24 Luigi Musso D50. # 32 is Cesare Perdisa 250F, # 14 Maurice Trintignant Vanwall, the blue cars are Gordini’s…

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Maserati team prior to the start of the 1956 race: # 32 Cesare Perdisa, seventh, and # 30 Jean Behra, third. Moss’ car is surrounded by mechanics (The Cahier Archive)

BP 250F ad

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Sources & Photos…

The Cahier Archive, David Kimble cutaway drawing, Michael Turner painting, blueprints T Caroli

‘The History of The Grand Prix Car’ Doug Nye

‘The History of The World Championship’ Alan Henry

Finito…


 

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Local boy Nino Vaccarella wrestled his big Ferrari into third place around the ‘Piccolo Madonie’ circuit in 1970…

Sensational Rainer Schlegelmilch shot captures the very essence of Targa, its geography and contrast of tradition and contemporary technology.

Porsche had ‘the game covered’ in 1970/71, they had the nimble, light 908/3 for Targa and the Nurburgring and the legendary 917 for power circuits such as Le Mans, Daytona and Monza. Brian Redman and Jo Siffert won the race in a 908/3 from Pedro Rodriguez and Leo Kinnunen in the other JW Automotive Porsche.

Ferrari only entered one factory car, Vaccarella partnered by compatriot Ignazio Giunti, a promising driver who made his F1 debut with Ferrari in 1970. He perished in a tragic accident in Argentina in 1971 when his Ferrari 312P (sports car) ran into the back of Jean Pierre Beltiose’ Matra 660 which he was pushing along the track, having run out of fuel.

Nino Vaccarella was a good bet for the win though, a local, he grew up in Palermo and knew the circuit ‘like the back of his hand’. He started the season well winning the Sebring 12 Hour with Giunti, and Mario Andretti. He won Targa thrice; in 1965 in a Ferrari 275 P2 and in 1971 in an Alfa T33/3. His final win was in an Alfa TT12 after Targa became a National Italian event, Targa losing its championship status after 1973 when the cars simply became too quick for the circuit on Sicilian open roads…not too quick for an Italian event however!

Vaccarella also had some Grand Prix experience, his best GP result ninth in the 1962 Italian Grand Prix in a privately entered Lotus 24 Climax.

Predominantly a Sports Car Driver, he also won the 1964 Le Mans 24 Hour Classic sharing a Ferrari 275 P with Jean Guichet and the Nurburgring 1000Km with Ludovico Scarfiotti in another 275P.

He is still alive and well living in Sicily.

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Stunning shot and an epic vantage point for the boys, Collesano. Vaccarella/ Giunti Ferrari 512S Spyder in shot (Pinterest)

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Vaccarella in the Sicilian countryside, the unique challenges of the circuit and driving a 5 litre 550 BHP V12 Ferrari 512S apparent…(Pinterest)

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Vaccarella in the car he shared with Ignazio Giunti, Targa 1970 . A second Ferrari 512S was entered by Scuderia Fillipinetti driven by Herbie Muller and Mike Parkes finishing sixth (Pinterest)

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Vaccarella finishes his 11th lap, the event which started and finished in Cerda. The lap record for the course was set by Helmut Marko in an Alfa 33TT3 in 1972 at an average speed of 128.253 KmH for the 72Km course on Sicilian open roads. (Pinterest)

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Cutaway of the Ferrari 512S. Space-frame chassis, 5 litre, DOHC V12, circa 550BHP. 5 speed gearbox, independent suspension by wishbones at front with coil spring/dampers (Koni), and single top link, inverted wishbone, radius rods and coil spring/damper units at the rear. A superb car if never as successful as the Porsche 917, its direct rival. (Pinterest)

Etcetera…

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Nino Vaccarella, Targa 1970 (The Cahier Archive)

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Vaccarella competed for Ferrari in the 1965 Italian GP in a 158. His engine failed in the race won by Jackie Stewarts’ BRM P261, the first of his 27 Grand Prix victories. (Pinterest)

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Jo Siffert in the 1970 Targa Florio winning Porsche 908/3 he shared with Brian Redman (Pinterest)

Photo Credits…

Rainer Schlegelmilch, The Cahier Archive, Pinterest

 

 

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Mika Hakkinen under moonlight, British GP Silverstone 1994…

On the face of it the Peugeot V10 made sense, it had won LeMans in the French company’s 905 sportscar twice, and McLaren wanted a long term contract with a major manufacturer of the type it had with Honda, and would start with Mercedes in 1995…

Hakkinen and Martin Brundle struggled with the cars, Nigel Oatleys chassis was fine but the Peugeots were ‘hand grenades’ often exploding with fundamental structural engine failures.

Ron Dennis had had enough by mid year, a deal was brokered which saw Jordan using the engines, and later Prost…all failing to achieve the points haul McLaren did in ’94, still Peugeot have achieved a good ‘bang for their buck’ in rallying , who needs F1?!…

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Peugeot A4/A6 3.5 litre V10, 3499cc circa 700-760BHP. McLaren TAG 6 speed, transverse semi-automatic gearbox (Anthony Fosh)

Photo Credits…

Anthony Fosh, Pinterest unattributed

 

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Tom Pryce, Karussell, Nurburgring, German GP 1975. Shadow DN5 Ford. Fourth in the race won by Carlos Pace’ Brabham BT44B Ford (Pinterest)

These great shots are of Tom Pryce in his Shadow DN5 Ford during 1975…

Pryce was one of ‘The Lost Generation’ of young Britsh F1 drivers killed in their prime, all of a similar age, at about the same time.The other two drivers featured in David Tremaynes’ book of that name are Roger Williamson and Tony Brise.

I’d add Gerry Birrell, an F2 pilot and Ford factory Capri RS2600 driver to the list, i was following his career as a teenager at the time.

All were products of the ‘British Racing Driver Production Line’ of the day starting in small sedans or Formula Vee and progressing through Formula Ford, F3 and eventually getting their Formula 1 break.

All were F3 stars and showed F1 promise, in Birrells case he was one of the drivers spoken of as Jackie Stewarts’ replacement at Tyrrell for 1974.

All died grisly deaths in racing cars except Brise who perished in the plane piloted by Graham Hill which crashed and killed the key members of his team upon return from a test session in France to the UK to Elstree Airport in November 1975.

Deaths in racing cars were all too common until the ‘carbon-fibre era’ which commenced with the first Mclaren MP4 in 1981. Arguably designer Gordon Barnards pioneering use of the material in racing cars has saved more lives than any other initiative down the decades?

Shadow DN5 Ford…

The Shadow, an English car and team funded by American Don Nichols United Oil Products, could be said to the ‘standard English kit car’ of the 1970’s.

It featured an aluminium monocoque, ubiquitous Ford Cosworh DFV engine, so reliable one wag described it as ‘the spacer between the driver and gearbox!, albeit a 500BHP spacer. The also ubiquitous Hewland FGA400 gearbox was a part of the package but Designer Tony Southgate, knew what he was about and put all of the knowledge gained at BRM from his successful P153/160 and P180 cars into the design, drivers Pryce and Jean-Pierre Jarier providng the other essential element.

Pryce won the 1975 non-championship ‘British Race of Champions’at Brands Hatch  in the DN5 beating Scheckter, Watson, Petersen, Ickx, Fittipldi, Jarier, Donohue. He was a driver ‘on the up’ perhaps staying at Shadow too long. In a team with a competitive car he was a grand prix winner if not a potential World Champion.

He died in the 1977 South African Grand Prix, colliding with a marshall running across the track to put out a fire. The marshall was unsighted by Pryce, closely following another car. Both were killed in the very tragic accident.

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Tom Pryce, Swedish GP, Anderstorp 1975. DNF, spun. Lauda won in a Ferraari 312T on his way to his first World Championship (Pinterest)

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Tom Pryce looking very English for a Welshman, British GP 1974 (Pinterest)

 

Ecetera…

 

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Roger Williamson and a March engineer share a joke, British GP 1973. It apperas to be about a covered up sponsors logo on his race suit…no captions of value on Pinterest so who knows!

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Roger Williamson ahead of David Purley, both in March 731 Fords, early in the 1973 Dutch Grand Prix. Williamson crashed after a suspected tyre failure and died of asphyxiation after Purleys valiant and heroic attempts to right the overturned car failed (Pinterest)

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Graham Hill, for whom he drove in 1974/5, and Tony Brise. (Pinterest)

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Tony Brise leads a gaggle of cars in the 1975 French GP, Hill GH1 Ford, he finished 7th in the race won by the Lauda Ferrari312T. Mario Andretti Parnelli VPJ4 Ford, Brambillas’ obscured March 751 Ford… the black car is the Ickx Lotus 72E Ford, the white car is Alan Jones in the other Hill, last in shot the nose of, i think, Donohues’ Penske PC1 Ford (Pinterest)

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Jody Scheckter & Gerry Birrell, Brands Hatch ‘Rothmans 50000’ 1972. McLaren M21 and March 722 F2 drivers that year. (Pinterest)

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Gerry Birrell in the factory Ford RS2600, ETCC 6 Hour Nurburgring july 1972. Birrell was both race and a test driver for this very successful program (Rainer Schlegelmilch)

Photo Credits…

Pinterest, Rainer Schlegelmilch


 

 

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Despite its sculptured Scaglietti flanks, never has an 860 Monza looked quite so good…actress Linda Christian adorns ‘Fon’ de Portagos’ Ferrari

The Marquis Alfonso De Portago, Spanish nobleman and journey-man driver was accompanied by Linda Christian at the 1957 Cuban Grand Prix, an event for Sports Cars.

Fidel Castros’ insurgents’ were on the move in the countryside but for the Batistas’ life went on. Keen to attract wealthy American tourists to the country to pump much needed funds into their moribund economy, an annual motor race was part of a plan to raise Cuba’s profile and provide an event to ‘attract the punters’.

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Out of focus and slightly surreal as a result…Fangio in his Maserati 300S, Malecon Boulevard, Havana, 1957 (Hy Peskin Collection)

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Wonderful panorama of Havanas Malecon circuit. # 14 is the Phil Hill Ferrari 857S, De Portagos’ Monza behind it with Linda Christian alighting…# 16 also a Ferrari , driver unknown ( Pinterest)

Ferrari 860 Monza…

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‘Fon De Portago Ferrari 860 Monza, unprotected nature of the circuit clear, 7 spectators killed in the 1958 event (Pinterest)

The 860 Monza was Ferraris front line sports car weapon, together with the V12 290MM in 1956.

It was part of the family of sports cars built over much of the ’50’s based on the Lampredi designed DOHC, 2 valve, Weber carbed 4 cylinder engine which first found success in the Tipo 500 F2/F1 cars. Ascari won the Championship in 1952 and 1953 in the Tipo 500.

The engine gave circa 310BHP from its 3431cc, gearbox was 4 speed. The usual Ferrari ladder frame of the period was used, drum brakes all round stopped the relatively light car which tipped the scales at 860Kg. The cars curvaceous body was built by Scaglietti.

Independent front suspension by wishbones and coil springs was new for the 860, and effective. A De Dion rear axle was at the rear, sprung by a transverse leaf spring.

 3 cars were built, the models most notable victories were at the Sebring 12 Hours and the Rouen GP, both in 1956.

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The field before lining up pre grid on Malecon Avenue, Havana

The Race and Aftermath…

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On the front row, De Portago Ferrari Monza, Phil Hill Fazz 857S Monza and Schell in the yellow Maser 300S, all the fun of the fair, over 100,000 spectators (Pinterest)

De Portago fought a race long battle with Fangios 300S and Carroll Shelby’s Ferrari 410 finishing third on the Havana waterfront street circuit.

The public relations opportunities for Batista evaporated rapidly when the Presidential motorcade, enroute to his palace was confronted by a relatively small group of ‘natives’ seeking favours from the President, the armed escorts beating the people with unbelievable ferocity and brutality. This fuelled the flames of the resistance movement further .

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Start of the race, Moss Maserati 300S, D Type Jag # 24 of local driver Alfonso Gomez-Mena (Pinterest)

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Fangio # 2 passes De Portago who is slowing a bit on lap 69 in Parque Mart. Maserati 300S and Ferrari Monza (Pinterest)

Jumping forward a year Fangio was kidnapped at gunpoint from his hotel the evening before the race by the rebels. He was returned to the Argentinian Embassy after the abortive event in which 40 spectators were injured and 7 died after local driver Armando Cifuentes lost control of his Ferrari and ploughed into the unprotected crowd.

The ‘race’ lasted 15 minutes or 6 laps Stirling Moss was declared the winner in his Maserati 300S.

Fangio was later to say he was never concerned for his safety,  he was held in a comfortably appointed apartment, was fed well, given a radio to listen to the race and was personally apologised to by Castros’ second in command.

In 1959 the race was not held as Castros revolution was in its final stages, in 1960 he had power. Anxious to create a sense of normality the race proceeded albeit on a circuit at army ‘Camp Freedom’, Moss the winner in a Maserati Birdcage.

Such grubby bourgeois activities as motor racing ceased and ‘Camp Freedom’ used to house the sort of people who attended such events…

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The beauty of the city and enthusiasm of the crowd, and its size come thru in all these shots! De Portago, Ferrari Monza 860 (Pinterest)

Linda Christian and De Portago…

Linda Christian was a successful Mexican/ American actor who starred in the first TV adaptation of the Bond novel ‘Casino Royale’ and in Tarzan, amongst many others. She was with De Portago for that fateful Mille Miglia later in 1957…

De Portago kissed Christian, jumped into his Ferrari 335S, and 70Km before Brescia the car blew a tyre, ploughed into the crowd killing Portago, co-driver Ed Nelson, 9 spectators and the Mille Miglia.

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de Portago and Phil Hill before the race, Havana 1957 (Pinterest)

Etcetera…

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Hill/O’Shea Ferari 857S Monza, Malecon Circuit pits, Cuba 1957 (Pinterest)

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The Castellotti Ferrari 290MM, V12 engined compared with the Monza 4 cylinder engine, both were Ferraris 1956 works Sports Car Championship entries . Castellotti in yellow polo shirt. (Pinterest)

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‘Chicken-plucker’ Carroll Shelby in trademark farmers overalls in the third place Ferrari 410, 1957 would be a great year for him. (Pinterest)

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Military very much to the fore…Fangio Maserati 300S # 2, Castellotti Ferrari 290MM # 10 (Pinterest)

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Juan Manuel Fangio beside his Maserati 300S in Cuba at the start of his final full season of racing in 1957. He drove for Maserati in both Sports and Grand Prix events, winning his fifth F1 World Title in the fabulous and by that time evergreen Maserati 250F…that car finally getting the title it deserved (Pinterest)

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Moss Maserati 300S beside the John Edgar owned # 78 Ferrari 4.9 driven by Carini (Pinterest)

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Hill/O’Shea Ferrari 857S Monza, Cuba 1957. Paul O’Shea checking out the engine (Pinterest)

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malecon 3

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Fangio after the 1958 Cuban Grand Prix and release by his Castro captors…(Pinterest)

che

It is not recorded if Che and Fidel attended one of Cubas’ Grands Prix…

circuit

poter

Photo and Other Credits…

Pinterest, Havana May Blogspot, Hy Peskin Collection

The End…

 


 

bt 24

BT24/1 was Brabhams’ car for the ’67 Grand Prix season, the title won by his Kiwi teammate Denny Hulme that year…

Looks comfy in there; no belts, they arrived in GP racing in’68, Smiths chronometric tach, ‘tell-tale’ showing 8600 RPM, leather bound steering wheel, aluminium fuel tanks by your hips on each side, no ‘bag tanks’ till 1970 so fire risk in the event of an accident enormous.

Bandinis’ horrific ’67 Monaco Ferrari crash a case in point.

‘Varley’ lightweight battery is under the cover over which your legs will stretch. Grey ‘stove enamelled’ chassis rails of the ‘space frames’ used by Brabham F1 cars till the end of ’69 under the shift lever, who needs those new-fangled monocoques anyway?! Fibre-glass body apparent on all sides.

Right hand shift controls a ubiquitous and reliable 5 speed Hewland DG300 gearbox. Its attached to a Repco ‘740’ Series SOHC 2 valve V8, being gently warmed up at 3400RPM. The engine gave circa 340BHP, far less than the new Cosworth DFV but enough to do the trick in ’67!

Oh! The little red plaque riveted to the dash says ‘Speed Should Not Exceed 170MPH’!

Brabham Racing Organisation always saw the lighter side of life under the surface of intense competitiveness and success.

Oh so period, just luvverly…

image

Brabham in BT24-1 at Silverstone , British GP ’67, he finished 4th. Trusting photographer on the inside of Woodcote Corner (Mike Hayward)

Photo Credits…

‘Jack Brabham with Doug Nye’, Mike Hayward

post

Jack Brabham, Repco engineer Nigel Tait, and Brabham BT19 Repco. Sandown Park Melbourne for its Tasman Series debut, January 1966. RB620 ‘E2’ engine in 2.5 litre capacity. (Australian Post magazine)

rb 620

Repco Brabham ‘RB 620 Series’ 3 litre SOHC V8 engine. The ’66 World Championship winning engine. Circa 310BHP @ 8000RPM. Weight 160Kg. ‘600 series’ block was F85 Oldsmobile based, ’20 series’ heads early cross-flow type (Repco)

In the second Repco article we start with a summary of the events leading to Repcos’ involvement in Grand Prix Racing, identify key team members, the equipment used to build the engines and finally a detailed account of the 1966 championship winning engines construction…

records

RBE factory records ’60’s style (Wolfe)

Why did Repco Commit to Grand Prix Racing?…

Younger readers may not know the background to Australian automotive company, Repco’s involvement in Grand Prix racing in the mid-60’s.

Coventry Climax, the Cosworth of their day caused chaos for British GP teams when they announced they would not build an engine for the new 3 litre F1 commencing in 1966.

Repco had serviced the 2.5 litre Coventry Climax 4 cylinder engines, the engine ‘de jour’ in local Tasman races, but were looking for an alternative to protect their competitive position, Jack Brabham suggested a production based V8 to them.

Brabham identified an alloy, linerless V8 GM Oldsmobile engine, a project abandoned by  them due to production costs. Jack pitched the notion of racing engines of 2.5 litre and 3 litre displacements using simple chain driven SOHC heads to Repco’s CEO Charles McGrath.

GM developed a family of engines, the F85 Oldsmobile and Buick 215, almost identical except that the F85 variant had 6 head studs per cylinder rather than the 5 of the 215 and was therefore Brabham’s preferred competition option.

Jack had seen the engines potential racing against Chuck Daigh’s Scarab Buick in a one off appearance by J Lance Reventlow’s outfit at Sandown, Australia, in early 1962. The engines competition credentials were further established at Indianapolis that year when Indy debutant Dan Gurney qualified Mickey Thomson’s 215 engined car 8th, the car failing with transmission problems after 92 laps. It was the first appearance of a stock block engined car at Indy since 1945.

scarab

Jack Brabham looking carefully at the Buick 3.9 litre engine in the mid-engined Scarab RE at Sandown Park, Melbourne in 1962, filing the information away for future reference! (Doug Nye with Jack Brabham)

Whilst the engine choice was not a ‘sure thing’ its competition potential was clear to Brabham, as astute as he was practical. At the time the engine was the lightest mass production V8 in the world with a dry weight of 144kg and compact external dimensions to boot. Its production future at GM ended in 1963 due to high production costs and wastage rates on imperfectly cast blocks, about 400,000 engines had been built by that time.

New Kid on the Block…

‘Having talked my way into the Repco Brabham Engine Co with a promise of hard work and a 3 weeks trial I was very happy’ recalls Rodway Wolfe.

‘I was given a nice grey dustcoat with a lovely Repco Brabham insignia on the pocket and shown around the factory and introduced to everyone. I was the seventh employee. Repco had picked the cream of their machinists from throughout the Repco empire, they were great guys to work with and willing to share all their skills.

The three-week trial period was a gimmick, after a few days I had settled in as one of the team. After the trial my wage was increased to slightly higher than my previous job in the Repco merchandising company.’

People: Key Team Members…

dyno

L>R: Phil Irving, Bob Brown, Frank Hallam and Peter Holinger dyno testing the first 2.5 litre Tasman RB620 engine at Russell Manufacturing’s engine test lab in Richmond in March 1965. Weber carbs borrowed from Bib Stillwell, the engine did not race in this form. The engine initially produced 235BHP @ 8200RPM, equivalent to a 2.5 Coventry Climax engine. ‘Ciggies a wonderful period touch (Repco)

‘The first prototype RB engine was built at the Repco Engine Laboratory in Richmond, Victoria (an inner Melbourne suburb, then a hub of manufacturing now a desirable inner city place to live, 1.5 km from the CBD) and was designated the type ‘RB620’, which was the file number of the various laboratory, research and development projects in process.

Frank Hallam was GM and Phil Irving Project Engineer together with Nigel Tait. Michael Gasking and Peter Holinger made the components and tested the engines. There were others involved before my time, those above were involved at Richmond’.

As an industrial site using steel garages in Richmond the RB project received comment in various overseas publications in 1966 of the ‘World Championship Fl engine built in a tin shed in Australia’.

‘When I joined in late 1965 the project had just arrived at the Maidstone, Melbourne factory. (87 Mitchell Street, Maidstone, then as now an industrial Melbourne western suburb, 10 km from the CBD) The Manager was Frank Hallam. In the drawing office, the Chief Engineer was Phil Irving, Production Manager Peter Holinger, Production Superintendent Kevin Davies, the machine shop leading hand was David Nash. We also had a Commercial Manager, Stan Johnson who came and went’.

hallam

Frank Hallam and Jack Brabham discuss the turning of camshaft blanks on the Tovaglieri lathe (Repco)

‘Around this time Michael Gasking also transferred from the Richmond laboratory was Chief of Engine Assembly and Testing.  Also on the machine tools was John Mepstead who was a great all rounder and later appointed to help Michael with engine assembly. He eventually joined Frank Matich to ‘spanner’ the 1969 Australian Sports Car Championship winning Matich SR4 Repco.

Frank Hallam arranged for me to attend RMIT night school, Repco picked up the bill. Those Tuesday and Thursday nights for 4 years helped me immensely, over the period I obtained a certificate in ‘Capstan and Turret and Automatic Screw Machines’ operation and a certificate in ‘Product Drafting’. My status was as a First Class Machinist in the Repco Brabham factory.

If I had any queries I would also ask Phil Irving who loved a yarn and he used to be a huge bank of knowledge. I felt so honored to to work for him, and learned so much from him’.

RBE formation

‘Repco Record’, the internal Repco staff magazine announces the formation of Repco Brabham Engines Pty. Ltd. (Repco)

Machine Tools…

‘Frank Hallam was a machine tool enthusiast. It was a big help, he made sure we worshipped our machines, blowing away the swarf with an air hose. I learned respect and cleanliness of all machine tools. Few machine shops are as clean or free of swarf and mess everywhere with the exception of Holinger Engineering, Peter was also fastidious.

We were lucky to have top machines in the workshop. Our biggest was an Ikegai horizontal boring machine. RBE had 2 lathes; a Dean Smith & Grace English machine and also a Tovaglieri Italian unit. We had a small Deckel horizontal borer and a couple of mills, a Bridgeport and a French Vernier. The older machine was a Herbert capstan lathe, I used this making every stud for all the future Repco Brabham engines. Main bearing and cylinder head studs, a very big variety in different steel types, repetitive stuff that would normally be boring but I didn’t care, we were winning the World Championship’…

‘When he drew a new design of stud, Phil Irving would come out and check out my thoughts on being able to make it with what we had and other various things. We would do a yield point test in a vice where we measured the length of the new stud after I made a sample and then tension it to a nominated foot pound tension and we would keep increasing the tension until the stud refused to return to the original length. That tension was known as the yield point so Phil would pick a tension somewhere in a safe range under that yield point’.

RB620 Series Engine: Machining & Modification of the Olds F85 block…

olds

Not the sharpest of shots but a rare one showing the ‘production’ Olds and RB620 engines. RB620 on the right. The engine was the lightest production V8 in the world at the time (unattributed)

‘When I arrived there were a lot of aluminum cylinder blocks along one factory wall. Repco acquired 26 Oldsmobile cylinder blocks from General Motors in the US. (2 of the 26 were prototype engines E1 and E2 which were built up in Richmond)

One of my first jobs was to remove all the piston assemblies from those 24 blocks. They were not short blocks as known in Australia (here they are complete without sump or cylinder heads) but these were not complete to that stage. They had crank bearings in place, all main bearing caps and the 3.5 inch liners were cast in the block. We didn’t use the cast iron main bearing caps or bolts, replacing them with steel caps and high strength studs.

The RB 620 used the original 3.5 inch cast in sleeves but practically everything else was changed. All surfaces were re-machined for accuracy, all bolt thread holes re-tapped and recessed to accept studs of superior material. The camshaft bearings were in the valley of the block of course but we pressed them out and rotated them 45 degrees and pressed them back in place to cut off the original oil galleries as our engine ran twin overhead camshafts, one per cylinder bank’.

‘The front original camshaft bearing was left intact and the second camshaft bearing was removed and fitted was a sleeve with an INA roller bearing. We made up little jackshafts which were driven from the crankshaft by a duplex chain, which also drove the single row chain driving the overhead camshafts. These jackshafts used the first original Oldsmobile slipper bearing and a small roller type bearing in the second original cam bearing location. The chains etc.were all enclosed inside the RB chain case.

rb 620 chain case

RB600 F85 Olds block from above. Note the valley cover of aluminium sealed ‘with a sea of araldite then painted over with Silverfros, those blocks which are still in service today still retain the araldited plate and still do not leak’ comments ex RBE engineer Nigel Tait. Phil Irving’s design had lots of clever bits including the timing chain arrangement which allowed the heads, also clever as the same head could be used on either side of the engine, to be removed ‘in the field’ without disturbing the engines timing (Tait/Repco)

block & timing case

600 block and timing case, ‘Purolator oil filter housing, timing chain single row (Repco)

‘A lot of people in 1966, including the international motoring writers did not realize the extent of the machining of the F85 Oldsmobile cylinder block to use as our engine base. It was more work and more involved in adapting the F85 than machining our new Repco cast blocks (700 and 800 Series) used later in the project.

It used to annoy all of us when our Repco Brabham engine was referred to as ‘Based on a Buick’ in various world motoring magazines. It also added insult to injury by adding ‘Built in a Tin Shed in Australia’!

‘We then had to close up the large cavity in the valley where there used to be a cover plate, pushrods and cam followers in the original engine. We spent many hours fettling aluminum plates by hand and fitting them into the valleys to cover the original cam followers and holes etc. When we had a very good fit of these plates we mixed 2 pot resin (Araldite) with additional aluminum powder and filled up the valley seams around the plate. Then with some elaborate heating systems we invented, we dried the araldite in place. This also gained us the reputation of the ‘The Grand Prix engine held together with Araldite’ in various motoring magazine articles!’

rb 20 block

RB600 block on the left, Olds’ F85 unmodified block on the right. The 600 block has the pushrod holes covered with the araldited aluminium plate. ‘The 1/4 inch thick block stiffener plate protrudes from the top of the modified block. This gives the effect of cross bolting…note also the Repco designed magnesium sump’ notes Tait (Tait/Repco)

‘I finished the job of dismantling the blocks, we only worked on 2 or 3 at a time during the early months of 1966. Unless the parts were an easy item or required substantial machine set up we only made a few of each component as design changes were ongoing. Not critical large changes but small subtle ones’.

‘We didn’t have any problems with the Oldsmobile block. There was one race in 1966 when a cylinder liner failed. As explained, we used the cast in liners and retained the 3.5 inch bore. BRO, (Brabham Racing Organisation) sent back the failed engine block and we bored out the remains of the cylinder liner. There was a casting cavity behind the liner which caused the weakness and failure. This was a problem that could not be dealt with without boring out all the liners and fitting sleeves. Otherwise there could be more failures due to bad castings. From that date we used dry liners and eradicated the risk of it occurring again.’

block

Jack and Phil specified this aluminium plate to add stiffness to the production F85 Olds block, big holes to provide rod clearance obviously. ‘This block would have had dry sleeves which lead to considerable blowby problems due to distortion and eventually wet sleeves were specified by Phil Irving’ notes Nigel Tait (Tait/Repco)

UK Components: Crankshaft Etc…

Phil Irving completed most of the design of the engine in England, he rented a flat in Clapham in January 1964 close to BRO and together with Brabham they settled on a relatively simple SOHC configuration, compatible with the block and fitment into the unused BT19 spaceframe chassis when the engine for which it was designed, the Flat-16 Coventry Climax was not used.

To expedite things in the UK, whilst simultaneously mailing drawings to Australia, Phil  commissioned Sterling Metals to cast the heads. Prior to his return to Australia in September 1964, HRG machined an initial batch of 6 heads, fitting valves and seats to Irving’s specifications.

‘Laystall in the UK also made the crankshaft. Constructed from a single steel billet the ‘flat’ nitrided crankshaft was a wonderful Irving design. I don’t recall any updates or changes to the design to the crankshaft over the years the RB engines were built. It was supplied in 2.5, 3 and 4.2 litres for the Indy engines. Also 4.4 litres and 5 litre sportscar versions. All crankshafts were of the same bearing dimensions etc’.

‘The term of ‘flat-crank’ refers to the connecting rod journals being opposite each other and not in multi-plane configuration as is usual in production V8’s. It meant  not such a well balanced engine at low revolutions but it actually converted the engine to virtually two four cylinder units and either cylinder bank would run quite smoothly on its own. The layout also enabled superior use of exhaust configuration eliminating the need for crossover exhaust pipes to obtain full extraction effect’.

crank

Crankshaft was made by Laystall to Phil Irvings design, pistons and rings by Repco subsidiaries. (Repco)

Pistons…

‘Repco is a piston ring manufacturer and very experienced in ‘ring design which meant that we were ahead in terms of the ring design. The famous SS55 oil rings were well known already around the world. The pistons were Repcos’. No other F1 engine constructor of the sixties made their own pistons. The experience gained with the supply of Coventry Climax pistons and rings contributed to this success.’

Bearings: Vandervell Interlopers! And ‘Racing Improves the Breed’…

‘Repco was already supplying engine bearings to various manufacturers globally from the Tasmanian based Repco Bearing Company, we obtained these components as required.

During 1966 an advert appeared in a British motoring magazine, ‘French Grand Prix won on Vandervell bearings’. Vandervell are of course a British bearing company, Repco were furious and telex messages to and from BRO (Brabham Racing Organization) revealed that Jack Brabham was not happy with the depth of the lead overlay on our copper/lead crankshaft bearings.

Our bearings had a lead overlay of .001inch and the Vandervell bearings an overlay of .0005. So I was instructed to pack away all our existing bearings and mark them not for use, our bearing company came up with the improved design bearings with the lesser overlay in time for the next GP. Racing certainly improves the product!

Before I transferred to the RB project and worked in Repco merchandising I received brochures and information about a new Repco alumina/tin bearing known as the ‘Alutin’ and advertised by Repco as a new high performance product. Repco were promoting them as a breakthrough design. I learned these new bearings had been unsatisfactory under test in the F1 engine and within a short period no more was said about the new product ‘Alutin’ . They were inclined to ‘pick up’ on the journals at high rpm. Another example of how racing  improves the product. This had not been evident in automotive engine testing by Repco to that date.’

ad

‘Racing Improves the Breed’…Repco Ad 1966

Outsourced Items…

‘There were some components we did source outside the Repco. There were cam followers, Alfa Romeo cam buckets, valve springs from W&S, valves manufactured by local company Dreadnaught. The ignition system was sourced from Bosch by Brabham.

The collets were from the UK and were a production car or motorcycle collet, the name escapes me. We made the valve spring retainers and collet retaining caps. Over the project we made  changes to the collet retainer material from aluminum  to heat treated aluminium bar and later titanium. Not a lot was gained as titanium fatigues as well, as we found out.’

Lucas Fuel Injection…

‘The fuel injectors and fuel distributor were Lucas items, although the system was in early stages of development. The system consists of an injector for each cylinder, in our case installed in the inlet trumpet a short distance from the inlet port in the cylinder head.

The system is timed with a fuel distributor in the engine valley driven from the chaincase by the distributor drive gear. The fuel is supplied at 100psi from an electric pump. The fuel pressure supplies and operates small shuttles which are constantly metering supply according to the length of shuttle travel. The amount of fuel supplied to the injectors is controlled by a variable small steel cam which is profiled to suit the particular engine size etc. The steel cam therefore controls the actual fuel mixture and is linked to the throttle inlet slides’.

‘It is interesting to note that although the fuel distributor can be timed to any position in the engine cycle, injecting at the point of the inlet valve opening or with it closed or wherever, it does not make any important difference in engine performance but as Phil Irving explained to me there is a point of injection that lowers engine performance so therefore the fuel distributor is timed in each installation to avoid the undesirable point of injection. The air inlet trumpets were cut to length spun and profiled’.

‘The chaincase was a magnesium casting and the ‘620’ 1966 World Championship engine used a single row handmade chain imported from Morse in the US. We cut all the sprockets and manufactured all the camshaft couplings etc. We used an SCD hydraulic chain adjuster, a standard BMC component.

The cam chain was driven by a small jackshaft which was fitted in the front two original camshaft bearing spaces of the original Olds block. The jackshaft was driven by a Morse duplex chain from the crankshaft sprocket, also Repco made. The crankshaft had a small gear driving the oil pump mounted underneath the chain case.’

chain case

Assembly of chain in the magnesium timing case of an RB620 engine (Repco)

Oil Pump…

‘The oil pump was a wonderful Irving design, simple to service but a small work of art. It featured flexible supply hoses with snap fittings and was a combination of oil supply pump which supplied the engine with oil up through a gallery in the chaincase and also a slightly larger scavenge pump connected to each end of the engine sump, also a magnesium casting. The pump assemblies, sump and all components were made by Repco.

The system consisted of a sump with an inertia valve located in its lowest point. If the car was braking the inertia moved the valve forward which opened a cavity in the front of the sump causing oil to be drawn from the front. Under acceleration the inertia valve moved backwards and the forward cavity closed and the rear cavity opened. This meant a minimum of blowby and air to be pumped by the scavenge system. I don’t recall any failure of this system apart from the  Sandown debut race of our ‘620’, 2.5 litre engine in January 1966′.

‘The ‘Tasman’ cars were held on the grid for rather a long time, the oil had cooled in the Repco Brabham. Jack left the line with plenty of revs, the cold oil and resulting oil pressure split the pressure pump gears. The first engines used cast Fordson Major tractor pressure pump gears and one gear had split due to the extreme pressure. Jack Brabham did  3 or 4 laps from memory.

I arrived at work on Monday morning and in typical Irving style found a drawing  for the supervisor for the construction of new steel gears and a ‘Do Not Use’ request for all stock Fordson gears. Phil had arrived at the drawing office on Sunday evening after the Sandown meeting and made the modifications straight away’.

‘The chaincase featured a couple of inspection caps which were removed to allow for chain tension adjustment etc. We made these caps and when it came to cutting the retaining threads in the chaincase we could not obtain the required thread tap anywhere. Phil had specified similar threads to the Vincent Motorcycle chain adjuster cap threads so that’s exactly what we used. Phi Irving brought in the original Vincent Motorcycle thread tap and we used that to thread all the chaincases under manufacture at the time, actually going back to valve spring collet retainer caps.

I recall that the first engines used BSA Motorcycle collet retainers. One of the things I enjoyed so much working with Phil was that he did not waste time on risk taking design, he used tried and tested systems from his past. He once said ‘There is really nothing new, it is just changed around in some way’… well he sure proved that with the first RB620 engine!’

chaincase componentry

Cylinder Heads…

‘The cylinder heads were cast aluminum of cross flow design, the cam covers cast magnesium. All our cast magnesium and aluminum components were supplied by CAC in Fishermans Bend, with the exception of the first batch of 6 heads cast in the UK. (Commonwealth Aircraft Corporation).

Phil was remarkable with his engine design skill in that he could see the item in reverse or 3 dimension and could design all the sand boxes etc and patterns required to arrive at the finished item.

The engine used no bolts as the original Olds did. Cylinder heads, cam covers, main bearing caps, sump, oil pump and chaincase were fitted with or retained by high tensile studs.That was my department and apart from the first couple of prototypes I made all the studs for the 1966/67 RB engines. Some were quite a challenge and the thread specification and tolerances were exacting.

The crankshaft rear bearing seal was a slipper ring design with a bolted on ring retaining flange. The slipper rings were supplied by our Russell Manufacturing Co, we made the outer flange in the factory. The steel flywheel was turned and made by Repco’.

Conncting Rods and Ease of Servicing…

rod

RBE conrod drawing (Repco)

‘We used modified Daimler connecting rods, competition Chevrolet and Repco rods. In later engines we occasionally used Warren rods from the US.

In the valley of the engine a small drive housing held the vertical ignition distributor and also the fuel distributor. Sometimes in the larger engines we also fitted a mechanical fuel pump to this housing. The type 620 engine engine had throttle slides running on small grooves with 1/8 inch steel rollers to prevent lock ups which would be a disaster. The slide covers were  fastened directly to the cylinder head and in later engines were changed to fully assembled units and fastened directly to the cylinder heads for ease of changing if required. They were then complete units with studs bolting them to the inlet flanges’.

A big feature of servicing the RB620 engine was that either cylinder head could be removed without disturbing camshaft timing or the camshaft from the cylinder head, a great time saver. (See the photos in the block section above which clearly shows this)

The oil pump can be removed in one small unit and replaced with no other dismantling. Or the two cylinder heads can be removed without disturbing the timing of the camshafts or the chain case. All very important design features, ‘in the field’.

engine assembly

RB620 engine assembly early 1966, Maidstone (Repco)

First Test…

The first engine, a 2.5 litre Tasman Engine ‘E1’ was fired up on March 26 1965, almost 12 months to the day Phil Irving commenced its design.

It was initially run with Weber 32mm IDM carbs and after a checkover fitted with 40mm Webers. The engine produced 235BHP @ 8200RPM, equivalent to a good Coventry Climax 2.5 FPF at the time.

Repco committed to build 6 engines for the 1966 Tasman Series, later changed to three 2.5 litre Tasman engines and two 3 litre F1 engines, the first race for the new engine was the non-championship South African Grand Prix on January 1 1966, the next part in the Repco story is the 1966 race program for the new engine.

rb 20 dyno long shot

‘2.5 litre 620 V8 E1 on the Heenan and Froude GB4 dynamometer in Cell 4 at Richmond, probably circa 1964/5. The exhausts lead straight out through a hole in the wall. Also there was minimal noise insulation in the tin shed that served as a test cell. Vickers Ruwolt across the road blamed us for the large crack that developed in their brick wall on the other side of Doonside Street!’ recalls Nigel Tait (Tait/Repco)

Photo & Other Credits…

Autocar, ‘Jack Brabhams World Championship Year’, Repco Record, ‘Doug Nye with Jack Brabham’, Australian Post, ‘From Maybach to Repco’ Malcolm Preston, Rodway Wolfe Collection, Nigel Tait recollections and his Collection, Repco Ltd photo archive

Etcetera…

letterhead

Original RBE Pty.Ltd. Letterhead. Jack Brabham had no financial (equity) or directorship involvement in this company, it was entirely a Repco subsidiary.

wade

‘E1’ was the RB620 prototype Tasman 2.5 litre engine. Most of the entries in this exercise book are dated, this one is not, but its mid 1965, the book records the use of cams with the ‘Wade 185’ grind and the valve timing, no dyno sheets sadly! (Wolfe/Repco)

repco 1

Have a look at this Repco film produced in mid-1965…

It covers some interesting background on the relationship between Brabham and Repco, footage of Jack at home in the UK, the Brabham factory in New Haw, some on circuit footage at Goodwood and then some sensational coverage of the 1965 Tasman Series in both NZ and Oz. The latter segues nicely into footage of the first ‘RB620’ 2.5 Tasman V8 engine ‘E1’ on the dyno at the Repco Engine Laboratory, at Russell Manufacturing, Richmond in ’65…

Next Episode…

Racing ‘RB620’ in 1966…

Tailpiece: #1-RBE620 2.5 litre ‘E1’, the prototype Tasman 2.5 V8, fitted with Webers on the GB4 dyno, Repco Engine Lab at Russells, Richmond 1965. The box over the Webers is for airflow measurement notes Nigel Tait…

rb 620 on dyno

(Tait/Repco)