Planes of Fame Air Museum in Chino, Ca. USA, has a restored, 1930s vintage, Boeing P-26A Peashooter
|The P-26 outside its hanger at Planes of Fame|
It still starts in the same way it did in the 1930s when it was a front line fighter.
With an inertial starter. You can find a brief blip on the technology at this Wikipedia link!
That means spinning up a flywheel, and using the flywheel to turn the engine and get that precious first spark!
But a mere description doesn't do the old technology justice.
Check out the video below! Those guys had to be in incredible shape!