Hey Randy:
Getting ready to try one of your AT36's on a pipe. Will be using a pipe I got from you a while back, pretty sure it was the 32-40 size quite pipe. At the time I was planning to use it on both an Enya 32 RE and a Enya 40XZS side exhaust. Can you give me some starting points on the AT36 for pipe length and launch RPM ? Also what's your recommended prop for this set-up ? The plane is one of Randy Powell's Ringmaster Delux, which is a profile. Projected weight will be ~48oz, and wing area is 615. Do you think the AT36 with a pipe will get the job done ?
It will pull it very easy, I would start with a 17 inch pipe lenght from first baffle to glo plug, Use a Bolly 11.25 x 4N or a Magic 12.2 x 4.2 cut to 11 inches. set it on the ground right at the point that it is between a 4 and 2 cycle..just sort of cackling in between both, Use 5% nitro 22% oil 1/2 1/2.
You will drop to a fast 4 cycle within 1 lap after launch,
This will be very close, if it goes too fast depitch, if it is slightly too slow pitch up, If it slows in the top of the manouvers add nitro, if it speeds up in manouvers decrease nitro. Use the needle to set the engine run..not to speed or slow the plane
Randy