ORIGINAL: Konrad
Ed,
The Senior Pattern Association (SPA) doesn't allow full wave tuned pipes? I'm way out of it as I don't follow any class of competition now. Rather sad if one thinks about it. My weapon of choice was the Page ''Mach 1'' on pipe and I thought is was dated when I campaigned it. Yes, a few of my last builds did suffer Curare-idus (bent stabs) It didn't help! I later flew the EUA1s and XLTs
The image thing was mentioned by the OP.
All the best,
Konrad
No, they do not. I'm certainly not expert on what they do and do not permit, but the customary tuned pipes that we are used to and flying with the retractable landing gear tucked up into their wheel wells are not permitted. I don't want to steal this thread talking about that stuff.
It's funny, but when trying to match the performance of an engine like the HB .61 PDP with a smaller/albeit higher horsepower smaller engine, it just never works out the way that some folks would like. The larger, older engine usually stomps the dickens out of the smaller engine with more horsepower. It's probably because the smaller engine has to turn a smaller prop faster in order to produce the lauted superior HP figure. This is something that I intend to experiment with in the coming months. I've flown an old original Kaos (60) size with smaller, but more powerful, engines and then compared the performance to the same model with K&B & HB .61 PDP engines. There is just something about the raw power of the larger displacement engines that the smaller, but more powerful engines, can't quite equal. I'm sure someone will have flown a sleeker old patternship with a smaller engine and liked it. But it just hasn't happened to me as yet.
Ed Cregger