- Lotus 56
The Lotus 56 was designed by
Maurice Philippe as Lotus 1968 entry in theIndianapolis 500 , replacing the successfulLotus 38 .Based on
Parnelli Jones ' STP Granatelli turbine car ("Silent Sam") that almost won in 1967,Colin Chapman 's team again produced an even more innovative design. The 56 was shaped like a wedge on wheels, in the same vein as the laterLotus 72 , which was also designed by Philippe (who had replacedLen Terry , the designer of previous Lotus Indy 500 cars) [Setright, L.J.K., "Lotus: The Golden Mean", in Northey, Tom, ed. "World of Automobiles" (London: Orbis, 1974), Volume 11, p.1233.] and Chapman. The engine of the 56 was also noteworthy, as it was aPratt & Whitney gas turbine engine of over Auto bhp|500|-1 and 1560 nm (1150.44 lb/ft) . To get the best out of the power produced, the 56 was fitted withfour wheel drive , something also used on theLotus 63 without success.Jim Clark was enthused about the car in testing, but he was tragically killed in an F2Lotus 48 in April 1968 before he could qualify the car at Indy - an occasion in whichMike Spence died in the 56, adding more tragedy toTeam Lotus .Nevertheless,
Graham Hill ,Joe Leonard , andArt Pollard were entered for the race, with Leonard claiming pole position. In the race Leonard was leading with ease with just a handful of laps to go when the engine failed. Lotus' innovation incurred the wrath of the governing body of American motorsport, and USAC deemed turbine cars and four wheel drive illegal shortly after, much to Chapman's frustration.The 56 would not be a total loss in any event. It inspired the
Formula Ford 61 and, in combination withwing s (pioneered by the 49), would transform Formula One. [Setright, p.1234.]Formula One
Undeterred by USAC's decision to ban the 56's technology, Chapman developed the car as a potential F1 machine after the failure of the
Lotus 63 , but while the car was promising, it was too heavy and too overcomplicated for F1.Emerson Fittipaldi tried the car in the 1971 Race of Champions and International Trophy non-Championship meetings. AtBrands Hatch , during wet practice, the 56 was far and away the fastest car on the track, but the race was held in dry weather and the car was lost in midfield. At the Silverstone-based International Trophy, the car only lasted three laps of the first heat before suspension failure forced Fittipaldi's retirement. Dave Walker ran the car in the Dutch Grand Prix, and had progressed from 22nd to 10th in five laps of the very wet track, before sliding off the road and into retirement. Fittipaldi used the car again in that year's1971 Italian Grand Prix and managed to bring the fragile design home 8th. By then Chapman decided to cut his losses and abandoned the 56, the four wheel drive concept and the gas turbine engine to concentrate on theLotus 72 (heir to the 56's wedge and 49's wings), [Setright, p.1234.] which went on to win the drivers' and constructors' championships for Lotus in 1972.Notes
ee also
Gas turbine
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