I have related this story many times, but one more won't hurt. About ten years ago, I arrived at Parowan for a Regional contest just as a self-launcher camp was finishing. The ramp was littered with engine parts that were being worked on and there was the flash of a welder as someone re-attached a silencer. All the self-launcher pilots appeared to be either working on, testing or discussing engines. It reminded me of a vintage British car rally where the focus is on how you keep them running not how you drive them!

Electric motors have few moving parts and almost never fail to start when required.

Mike