Dear All
I have a converted Ryobi 31cc engine in my 1/6th scale Spitfire.
I am getting 6100 rpm on an 18/8 prop, this is not quite enough for the spit.
The question is what kind of rpm are other people getting with this set up.
A friend of mine told me that some people are getting nearer 7000 with this set up.

Regards Phil G.