da Rock

I'm running OS91 2-cycles on all my 60-90 size warbirds: H9 Spit, Thunderbolt, Corsair and Hellcat and the new TF P40. The Master Airscrew 14x7(3) is what's on all of them. I was worried at first the pitch would hurt landing approaches. No problem. The OS idles down perfectly and the airframes all seem to provide enough drag to get the airspeed down. That's a really lucky thing, as there are almost no 3 blades around.

BTW, the Hellcat clocked 113mph on radar a couple of months ago. Then came in to land as slow as can be. So that prop and engine can do it all.

I've recently gotten a Zinger 3-blade to test. It's got bolt in blades, so testing pitch and diameter is going to be possible. That's planned for the spring and will be done with the P40. It's got a huge spinner that can hide the huge hub setup on that Zinger. Man, I wish there were more 3s available. It really looks to me like our RC modeling community has shot itself in the head with the "efficiency" bullcrap.