You bet, and they were the prime factor that gained us air superiority over Europe.
I remember puting a see through visable P-51 model together as a kid. It had a working prop with a small electric motor inside the engine, and the landing gear lowered and raised by electric motor. Alas, no longer available on the model scene! Its my second favy aircraft of all time, the Spit though will always be my first. The nearest Spit to me ( Vermont) is at the Hamilton,Canada, Air Museum.