I have found a candidate motor for use as a generator:

http://surpluscenter.com/item.asp?UI...tname=electric

I believe this motor has 8 poles, a synchronous speed of 900 rpm and
full load slip of 12%. So it should be around 70-75% efficient,
shouldn't it?

Would this be a suitable motor for further experiments with
self-excited induction generators? It's used, but it's cheap, small,
and seems efficient enough.

Doug