The last appearance of an Eagle Mk1 in a Formula One race was when Pease privately entered 101 for the 1969 Canadian Grand Prix. Pease and the Eagle-Climax car suffered the ignominy of being the only car in the history of Formula 1 to be disqualified at a World Championship race for being too slow. The basic Mk1/Mk2 chassis design continued to be used in American National Championship races into the early 1970s. In common with most cars of the time, experimental wings and other aerodynamic aids - including the eponymous Gurney flap - were added to Terry's lithe chassis lines over the years, reducing the cars' visual impact and obscuring car's most noteworthy single design feature, the vestigial eagle's-beak nose.