A guy who had been in the air force told me about their electrical generators. They used them to set up temporary air traffic control installations to guide fighters to targets and stuff. The generators would kick off after X hours of continuous operation, to protect them from destroying themselves (due to heat, I presume). That's standard on civilian versions of the generators. But the air force wouldn't buy them unless there was an override. If you need that generator so that you can control the 10 more minutes of an air battle, even if it destroys the generator, you can get it.

Generally known as BattleShort

https://en.wikipedia.org/wiki/Battleshort

Or, Id rather damage the bilge pump, than not have it when we're flooding...

Older military aircraft used to have a 'War emergency power' setting (WEP), it produced more than 100% of the engine's normal rated power but it decreased the operating life of the engine substantially and could only be run for a few minutes.