Posts Tagged ‘1972 Italian Grand Prix’

image

Inboard front suspension, top rocker, lower wishbone and inboard mounted coil spring/Koni shocks (Schlegelmilch)

Mario Andretti psyches himself up before a practice session in his Ferrari 312B2 prior to the 1972 Italian Grand Prix…

Andretti qualified the Ferrari 7th and finished 7th, teammates Jacky Ickx and Clay Regazzoni proved the cars pace by popping the car on pole and 4th.

image

Andretti, Ferrari 312B2, Monza 1972 (Schlegelmilch)

Jacky lead the race after Clay Regazzoni’s car clipped the back of Carlos Pace’ March when the latter spun at the Vialone chicane. Ickx snuck back into the lead only to lose it when the Flat-12 failed; Fittipaldo took the win and title in his Lotus 72D Ford.

image

The Ickx’ and Andretti Ferrari 312B2, the #10 2nd placed Surtees TS9B Ford of Mike Hailwood and #9 de Adamich TS9B DNF. Note Ferrari rear suspension detail as per the text (unattributed)

Background…

The Ferrari 312B2 made its debut in Monaco GP 1972, it was a new car rather than a development of the original car for which the Ferrari 3 litre flat-12 was designed, the 1970 312B.

Said engine had a shorter stroke, aimed to increase revs and thereby increase power. The nose cone was low and squarish, the flanks more straight than the rounded shape of the earlier cars, and the rear wing attached to an appendage of the roll-bar.

The rear suspension was redesigned with twin struts and spring/damper groups mounted above the gearbox and connected to the hub with tubular arms. The aim was to reduce unsprung weight. The coil spring-shocks were shifted towards the centre of the car above the gearbox. The car remained a handful as drivers struggled with the handling in combination with the Firestone tyres, a continuation of some of the problems of 1971.

andretti

Andretti’s 312B2 on the way to 4th place in the 1971 German GP, Stewart won in Tyrrell 003 Ford (unattributed)

Ferrari were struggling with direction at the time after several difficult years, the situation climaxed halfway through 1973 when Luca Di Montezemolo was brought in from Fiat to sort things and provide clear leadership.

312B2 wasn’t a great Ferrari, Jacky Ickx able to scored just a single win with the B2 in 197, the Dutch GP at Zandvoort in rainy conditions whilst teammate Clay Regazzoni placed 3rd twice.

In 1972 Ickx only won the German GP, despite 4 poles. Despite the disappointing results, It raced on into 1973came in action in 1973, Merzario scored 4th at Kyalami before the B3 appeared, a lousy car. with Ickx decamping prior to the German GP…The teams resurgence began with the 1974 B3 variant and the powerful Lauda, Montezemolo, Forghieri cocktail.

Design and Specifications…

image

Chassis Type 621/A monocoque of ‘Aero type’ with aluminium panels riveted onto  tubular steel spaceframe structure with a partially stressed engine.

Suspension; Front Double wishbones: upper rocker arm, lower wishbone, inboard spring/damper units and anti-roll bar. Rear; Single upper radius arm, horizontal spring/damper units mounted atop the transaxle and anti-roll bar.

Engine; Type 001/1, Flat-12 derived from the 001, light alloy cylinder block and head, DOHC, 4 valves, Lucas fuel injection, Marelli electrnonic ignition. Aluminium wet cylinder liners, bore/stroke, 80 x 49.6 mm, 2,991cc, compression ratio 11.5:1. 480bhp@12500rpm

Gearbox; 5 speed Ferrai transaxle with slippery diff. Brakes; Lockheed discs and calipers, inboard at rear. Rack and pinion steering.

Tyres/Wheels; F/R 8.6-20-13″, 13.5-24.0-15″ Firestones. Wheels: cast light alloy; front 10×13″, rear 15×15″

image

Andretti, 312B2, Monza 1972 (unattributed)

Etcetera…

imageAnother couple of Schlegelmilch shots on Andretti at Monza…

image

 

 

 

 

 

 

 

 

 

image

 

 

 

 

 

 

Credits…

Rainer Schlegelmilch, f1technical.com

Tailpiece: 1971 Monza pre-race engine changes, 312B2…

image

 

 

image

The ever innovative Derek Gardner with an ‘aero-tweak’ being tested on Francois Cevert’s Tyrrell 002 Ford during Italian GP practice at Monza on 10 September 1972…

This huge sleeve over the exhausts is cowled from the oil coolers back, the idea being to harness the exhaust gas energy to entrain air through the sleeve and enhance airflow and hence better cooling thru the oil rads.

Francois hadn’t done too many laps when the ‘prophylactics’ parted company with the car at very high speed, bouncing their way into lightweight schrapnel around the famous autodrome, fortunately ‘002’ was well clear of any following cars at the time!

The shot below shows a standard ‘006’ rear end to give an idea of how the car appeared sans ducts. Ken Tyrrell and Jackie Stewart discuss the sublime weather before Francois is sent on his way. These cars evolved a lot throughout 1972/3, the Tyrrells arguably (Lotus 72 pace duly noted!) the quickest cars of the era from the time ‘001’ first raced at Oulton Park later in 1970 until Stewart’s retirement and Cevert’s death at Watkins Glen at the end of 1973.

tyr arse

Date and place unknown, 1973 Tyrrell 006 Ford, Cevert up (unattributed)

Monza ’72 wasn’t a good race for the ‘Boys in Blue’ at all though, JYS popped a clutch on the line and was lucky not to get ‘whacked up the clacker’ at a million miles an hour and Francois’ engine ‘popped’ on lap 14. Emerson Fittipaldi took the race and the ’72 title in his Lotus 72D Ford.

tyr franc

FC looking very ‘chillaxed’ prior to the ’73 British GP at Silverstone, Tyrrell 006 Ford (unattributed)

You might find this story about Cevert’s early career of interest if you haven’t already seen it;

https://primotipo.com/2014/11/07/francois-cevert-formative-years/

I wrote an article a while back about Team Tyrrell and innovation, have a read of it if you haven’t. Its amazing just how ‘edgy’ Ken’s boys were over the years given their resources relative to bigger, better funded teams;

https://primotipo.com/2014/09/16/tyrrell-019-ford-1990-and-tyrrell-innovation/

tyr fran silvers

Roll on into mid-1973 and Derek was considering his overall design and aero alternatives for his 1974 car…

Here Francois is testing ‘005’ during British GP practice at Silverstone in mid July, JYS did a few laps in the same car carrying #42. It looks remarkably cohesive for a car designed originally with a totally different bluff nose aerodynamic concept!

tyr brit

Compare and contrast the ‘normal’ bluff nose Tyrrell ‘006’ Cevert races here in front of James Hunt’s March 731 Ford at the British GP, Silverstone in 1973, with the ‘005’ chisel nose he tested in practice above. Hunt was a splendid 4th, Cevert 5th, Revson took his first GP win in a McLaren M23 Ford (unattributed)

It was a good year until the USGP, JYS took his third title in the ‘low polar moment of inertia’, short wheelbase, twitchy but very quick in both Stewart and Cevert’s hands, Tyrrell 005/006 cars.

Click on this link for a short story about those cars;

https://primotipo.com/2014/08/25/jackie-stewart-monaco-gp-1973-tyrrell-006-ford/

Gardner had a pretty handy additional test pilot in Chris Amon who was contracted the drive the spare Tyrrell 005 in the end of season North American GP’s at Mosport and Watkins Glen. Chris was always rated as a test-driver by all he raced with from Ferrari’s Mauro Forghieri ‘down’.

Amon raced 005 in side radiator/chisel nose spec in Canada, he didn’t race it at Watkins Glen after Francois’ fatal accident on the Saturday resulted in Ken Tyrrell withdrawing the teams cars for the race, which would have been the retiring Stewart’s 100th GP.

tyr amon

Chris Amon 10th in Tyrrell 005 Ford in the Canadian GP, Chris has ‘modified’ the cars nose during the race. JYS was 5th in 006, Cevert DNF after a collision with Scheckter, Peter Revson won the race in a McLaren M23 Ford (unattributed)

Derek Gardner tested the ‘chisel nose, side radiator’ aerodynamic approach pioneered by the Lotus 56 at Indianapolis in 1968.

After the history making changes at the 1973 seasons end Derek Gardner threw out the conceptual approach he had decided upon for 1974. The car was to be a ‘highly strung thoroughbred’ from which maestro’s Stewart and Cevert could extract every ounce of performance. His change was to a much more forgiving chassis attuned to the developmental needs of ‘cub drivers’ Jody Scheckter and Patrick Depailler for 1974, his ‘007’ design the very effective result.

tyr 007

Tyrrell 007 Ford cutaway; aluminium monocoque chassis, Ford Cosworth 3 litre DFV V8, Hewland FG400 5 speed transaxle, disc brakes inboard front and rear, wishbone front suspension with coil spring dampers, rear suspension by single upper link, lower parallel links, radius rods and coil spring/damper units, adjustable roll bars (unattributed)

Tailpiece: The ’74 Tyrrell 007 Ford in Depailler’s hands, Swedish GP in which he was 2nd and Scheckter’s 1st, winning the South African’s  first GP. Evolution of Derek Gardner’s aero thinking clear from ’73-’74, mind you he went back to a bluff nose for his outrageous P34 6 wheeler for 1976…

tyr pt

(unattributed)

Credits…

Rainer Schlegelmilch, Doug Nye ‘History of The GP Car’