Dallas - - -Site of a single US Grand Prix in 1984, the race was run in blisteringly hot conditions on a 3.9 km circuit and won by Keke Rosberg (Williams-Honda).
De La Rosa, Pedro - - -After driving for a number of teams, Pedro de la Rosa is working as test driver for Jaguar and has been promised a drive in the 2002 season.
Dennis, Ron - - -A former race mechanic, Ron Dennis has used his natural business skills to become a major player in Formula One and now heads the powerful, and highly successful, McLaren organisation.
Detroit - - -Site of seven Grands Prix, five called USA-DETROIT, run in 1982-86 when the U.S.A. hosted two G.P.s each year, and two editions of the U.S. GRAND PRIX, in 1987-88. All seven races took place on the same 4.023 km downtown circuit. Brazilian Ayrton Senna won the final USA-DETROIT race, in 1986, and the two subsequent U.S. GRAND PRIX events, in 1987-88, to score a "hat trick" on the streets of "Motor City".
Differential - - -Mechanism, usually inside the gearbox casing, that drives and regulates both driveshafts, allowing them to rotate at different speeds, hence its name.
Digital TV - - -Digital TV uses digital signals to transmit broadcast information with CD-quality sound and much sharper quality images than those produced by traditional analog signals. BERNIE ECCLESTONE has spent a considerable amount of money to buy and develop the equipment to produce DTV.
Dijon - - -Major centre in the Côte d'Or wine region of east central France, the Dijon-Prenois circuit was home to five editions of the FRENCH GRAND PRIX, in 1974, 1977, 1979, 1981 and 1984. A single edition of the SWISS GRAND PRIX was also run on the 3.8-km track in 1982.
Donington Park - - -This 4.023-km race track outside Derby was a famous pre-war site of the British Grand Prix. In the modern era, it was host to the 1993 European Grand Prix, won memorably by McLaren's Ayrton Senna.
Downforce - - -The force created by air flowing over and around the bodywork, wings and suspension of a race car that promotes adhesion to the track as speed ncreases.
Drive-by-wire - - -See FLY-BY-WIRE.
Dutch Grand Prix - - -See GRAND PRIX OF HOLLAND.