Is it one of the older ones or the new one?

A friend had one of the early ones, back in the mid 70's and flew the heck out of it for a couple seasons. It ran quite well...strong for it's displacment, and spun a 9X6 Top Flite wood (sorry, no r.p.m. figures )

I recall it ran great on our club fuel, 10% nitro, 20% oil, until our fuel maker decided to (unknown to us ) use all synthetic oil in our next batch of club fuel, and the Wankel lost it's seals, and most of it's compression and power. (several guys cooked their engines actually, but that's another story )

I think that as long as you don't over-prop it and/or over heat it and use a fuel with castor (as I know you will Jens, because you have much experience![8D]) it should last for quite a while...(who knows for sure, aye!?)