YS 70 DZ 11x14 APC at 11,300 on 55% nitro

YS 115 14x13N 10,550 on 55% nitro

Worked 91FZ 12x12 APC 13,500 on 65%

The 115WS will also tune close to the same numbers as the 14x13N on a 13.5x13.5 regular blade and works well on planes over 150mph.

Jeff, I have an old F1 Rivets kit I'm going to start working on once I get caught up. Was thinking about putting a 70 in it. Will be interesting to see what it does as compared to the K&B 7.5 RIRE or ST X40 that were in use when the airplane was designed.

It will be slower as I have done it in a old F1 plane but it was only on 20%. should do 15-160 on a 11x13 cut down to a 10.25x13 on 50-55%