Lotus 77

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Lotus 77 (John Player Special Mk.II)
Lotus 77 Sears Point.jpg
The Lotus 77 on the Sears Point Raceway
Category Formula One
Constructor Team Lotus
Designer(s) Colin Chapman
Geoff Aldridge
Martin Ogilvie
Predecessor 72 / 76
Successor 78
Technical specifications
Chassis Aluminium monocoque
Suspension (front)Lower wishbone, top rocker
Suspension (rear)Single lower link with double, parallel upper; twin radius rods
Engine Ford-Cosworth DFV 2993cc V8, naturally aspirated, mid-mounted
Transmission Hewland FG400 5-speed manual
Power465 hp (347 kW) @ 10,800 rpm [1]
260 lb⋅ft (350 N⋅m) torque
Tyres Goodyear
Competition history
Notable entrants John Player Team Lotus
Notable drivers Flag of the United States.svg Mario Andretti
Flag of Sweden.svg Gunnar Nilsson
Flag of Sweden.svg Ronnie Peterson (one race)
Debut 1976 Brazilian Grand Prix
First win 1976 Japanese Grand Prix
Last win1976 Japanese Grand Prix
Last event1976 Japanese Grand Prix
RacesWins Podiums Poles F/Laps
161511
Constructors' Championships0
Drivers' Championships0

The Lotus 77 was a Formula One racing car designed by Colin Chapman, Geoff Aldridge and Martin Ogilvie for the 1976 Formula One season.

Contents

The car was a stop-gap means to an end for Lotus, who were fighting back after the failure of the Lotus 76 and the obsolescence of the Lotus 72 in 1975. Three chassis were built and, as of 2018, all are still in existence.

Design and development

The Lotus 77 featured a slimmer, lighter monocoque design over the 72, but was similarly powered by the Cosworth DFV. It featured improved aerodynamics and repositioned radiators to aid better cooling. The front brakes were initially inboard, in line with its predecessors, but were moved outboard in a more conventional design part-way through the season. The suspension was designed around a series of rocker arms instead of the usual set up of wishbones. The idea behind the new system was to set the suspension up for a specific track, taking into account ride height and road surface, and the 77 was dubbed 'The Adjustacar' as a result. It worked in a fashion, but inexperience with such an infinitely adjustable car meant that optimum settings were often not achieved.

Front end of the Lotus 77 Lotus 77 Mont-Tremblant 04.JPG
Front end of the Lotus 77

It was quickly deemed that this suspension arrangement wasn't suitable and Len Terry was brought in to design a more orthodox system with rocker arms and outboard brakes. Later in the season Lotus hired Tony Southgate from Shadow to act as chief engineer. He moved the oil radiator to the nose to improve weight distribution and also added a cockpit-adjustable rear anti-roll bar and a lighter compressed-air starter.

All drivers reported the steering and ride were occasionally vague and unresponsive and that the car lacked straight-line speed. Andretti did not care for the car, proclaiming it to be a 'dog'. This motivated Lotus to accelerate research and create the Lotus 78.

Racing history

Andretti skipped the Monaco Grand Prix to race in the Indianapolis 500.

Lotus 77 in an exhibition Andretti Lotus 77 2.jpg
Lotus 77 in an exhibition

After a slow start to the season, the 77 proved to be best of the rest behind Ferrari, McLaren and Tyrrell. Andretti worked hard to develop the car, and from mid season onwards, the 77's performance picked up. It was however best suited to tracks with long corners such as Anderstorp, where Andretti led easily before engine failure put him out. At Zandvoort and Mosport Park tracks he finished on the podium.

Colin Chapman vetoed Andretti's request to race the Lotus 78 at Zandvoort, so Mario reluctantly raced the 77 until the end of the season. The final race was run in monsoon conditions at Fuji Speedway in Japan. Andretti's car was very well set-up for the track, with the car set to its narrowest width and with virtually flat rear wing; [2] Andretti drove a clever tactical race to win by a lap from Patrick Depailler and new world champion James Hunt. Andretti was glad to put the 77 aside to concentrate on developing the 78 for the 1977 Formula One season.

Complete Formula One World Championship results

(key) (Results in bold indicate pole position; results in italics indicate fastest lap.)

YearEntrantEnginesDrivers12345678910111213141516PointsWCC
1976 John Player Team Lotus Ford Cosworth DFV 3.0 V8 BRA RSA USW ESP BEL MON SWE FRA GBR GER AUT NED ITA CAN USA JPN 294th
Ronnie Peterson Ret
Bob Evans 10DNQ
Mario Andretti RetRetRetRet5Ret1253Ret3Ret1
Gunnar Nilsson RetRet3RetRetRetRetRet53Ret1312Ret6

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References

  1. "Engine Ford Cosworth". STATS F1.
  2. Brown, Allen (8 June 2018). "Lotus 77 car-by-car histories". OldRacingCars.com. Retrieved 12 June 2018.