Guys,
Wondering if I can get some advise. I'm going to use an OS 1.60 2 stroke on this plane, Bisson Pitts inverted wraparound muffler. Engine was broken in on the bench using Wildcat 10% Nitro, 24 % oil, 17x10 APC prop, #8 plug. After break-in the follwing values were obtained using Wilcat 10% Nitro 18 % oil:

17x10 APC prop, Platt Spinner backplateattached (no spinner cone) 7800 rpms

18.1 X 10 APC prop, Platt backplate attached ( no spinner cone) 7200 rpms


Have not flown the plane yet. How dothese RPM values look? and which prop should I use for flight? would prefer a shorter take off run. Also,I didn't attach the spinner cone because I haven't yet received the proper screws to attach the cone toth backplate. Thanks guys. Any advice would be appreciated.,

Messer