pumbadog You can use the APC props, heck go to a unlimited race thats about all they use. probably safe to say that unlimited racers are turning more revs than you will. What keeps people from APC is the weight, they are very heavy, and at low rpms it puts a lot of shock load on the airframe to swing them. People use the thick wood props to cut down on prop noise. What I do is get an oversize TF prop and trim it to a size that my engine likes to run. TF makes very good props from a very good wood, however they are very thin too and will flex if you rev them too much. You might possibly get more performance from a thin prop than a thick prop concidering that you are talking about a 36cc engine, thats a little diferent from a 3W106 or DA100 etc. If you want to try a thick wood prop try the NX props they slow your engine down but give you back a lot in thrust with very little noise.