Howard Ketcham's Atomic sports car for tomorrow
That's right!
The design incorporated a heat reflecting solar dome and the engine had no moving parts since it was atomic-powered!
Another blind alley but interesting thinking..
Googling Howard Ketcham shows him to have been an expert with colour and he worked closely with the motor industry using his ideas. As I said before though, I haven't found any other sketch of a car by him.
Well done!