I was considering getting a 24V 6-7-8kW modell from a scrapyard and drive it on 12V only. For my goals a continous 1-1.5 kW would be acceptable, with few seconds / half a minute peak power of 2 - 2.5kW.
I know even though they might overheat in no time... Well, it's an option to try anyway. If somebody has a huge truck starter at home, they could hook it up on a car battery and see what happens.
(I saw a small car conversion in Hungary done by a group of students. They got a rally small Fiat 126 "car" and somehow they acquired a pair of Ilyushin airplane starter motor. That runs ok. but of course that motor might be a completely different construction.)
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