Looking at an old DC 3 engine at the Teterboro Air Museun, I noticed the twisted wiring from bolt to bolt. Because of the configuration its purpose was quickly apparent. The internet provided much more info re a subject of which I had been completely unaware. It offered that aircraft and racing cars are so equipped because of vibration.
Does this apply to regular in-line engines in small aircraft or just to radials? What about jets that presumably have less of the destructive vibration.
I assume that regular automotive engines are exempt because they are seldom run at close to full power.