eight wins during 1971 and 1972 and gave Stewart the 1971 World Drivers' Championship. For 1972, Gardner tried inboard brakes on the 005 but proved unable to work out their problems. During his early years in F1, "Uncle" Ken, as he was often known, reached the peak of his career. The 006, with its tall airbox, appeared in 1973 and was better than the 005. However, Tyrrell was profoundly affected by the death of Cevert in practice for the 1973 US Grand Prix, leading to Stewart announcing his retirement, the World Championship already his. With the death of Cevert and the departure of Stewart, Tyrrell in 1974 hired Scheckter and Patrick Depailler and Gardner designed the less-twitchy 007. It was good enough for Scheckter to place third in the World Championship and for Depailler to be ninth in his rookie season and for the team to continue to campaign the car during 1975. In the following years, the Tyrrell team slipped down the rankings to mid-field, despite having employed natural talents such as Scheckter, Depailler and Ronnie Peterson, as well as lesser lights like Jean-Pierre Jabouille, in a third 007 in 1975. Still, Tyrrell found the time to introduce new concepts for F1. In 1976, the Tyrrell team created the six-wheeled P34, with four front wheels. The Gardner-designed single-seater achieved a race victory but it was abandoned after Goodyear refused to develop the small tyres needed exclusively for the car as it would detract from the efforts in the ongoing tyre war with other tyre manufacturers. In the early 1980s Tyrrell's fortunes declined to the point where he had to run his team without sponsorship. Tyrrell still retained his eye for talent, bringing Michele Alboreto, Stefan Bellof and Martin Brundle to F1, but was not able to retain them. Without the proper funding, Tyrrell was the only entrant with the Cosworth DFV at a time when all other teams had switched to turbocharged engines. Alboreto scored the engine's last win in 1983, but in 1984 the team was excluded from the championship after being found to have run underweight cars before adding ballast during pit stops. Tyrrell denied this and felt his team was being singled out for refusing to run more expensive turbos. In the early 1990s Tyrrell relinquished much of the company's control to his sons and to Harvey Postlethwaite, who was the first to introduce the high-nose