Today's SMH has an article about the announced Land Speed Record attempt by the folks who currently hold the record. They've announced that their planned 'car' will consist of two rockets and a jet engine and that they hope to reach speeds of 1600km/h+.
I read the article and wondered to myself when does a car actually stop being a car? I mean, the way I classify a car is a vehicle with 4 wheels and has an engine driving those wheels to carry someone from point a to point b. This thing, in my mind, isn't a car anymore. It's an object on wheels, that has a couple of rockets attached to it to push it along. The rockets or engine aren't driving the wheels. How is it different to an aeroplane with no wings or even a rocket on it's side?