   shadow racing cars was a formula one and sports car racing team, founded and initially based in the united states although later formula one operations were run from britain. the team held an american licence from 1973 to 1975 and a british licence from 1976 to 1980, thus becoming the first constructor to officially change its nationality. their only f1 victory was achieved as a british team.http://www.racingsportscars.com/f1/entry/zeltweg-1977-08-14-14189.html ==history== ===1970â1972: early years in canam series=== the company was founded by don nichols in 1968 as advanced vehicle systems; the cars were called shadows, designed by trevor harris and entered under the shadow racing inc. banner. the first shadow, the mk.i, was entered in the canam series with george follmer and vic elford driving them. the mk.1 featured an innovative design, using very small wheels for low drag and although the car was quick, it was not the most reliable car in the field the team became more competitive the following year, replacing the harris car with a peter bryant design owing some elements to his ti22 'titanium car' with jackie oliver also arriving from this effort and finishing eighth in the canam championship. the team also found some financial backing in universal oil products (uop). shadow came to dominate the shortened 1974 series, although by this point they were competing largely against privateers, the works mclaren and porsche efforts having left the series. ===1973â1974: entry into formula one===  towards the end of 1972, nichols announced that he was entering his team into formula one with uop sponsored cars designe
American_auto_racing_teams American_racecar_constructors British_auto_racing_teams British_racecar_constructors Can-Am_entrants Companies_disestablished_in_1980 Companies_established_in_1971 Formula_One_constructors Formula_One_entrants World_Sportscar_Championship_teams