I can't remember the name but I think it was a Disney movey and it involved an old fashioned flying car. After that, I can't remember anything except Star Wars.
Possibly Fred Macmurrey in one of the Blubber movies called "The Absent Minded Professor". But seeing you only remember Star Wars, I doubt if it was what I was thinking.
Nope Adrian definitely named it with Chitty Chitty Bang Bang. I looked up the name and the poster matched my memories.