Hi, I've been given plans for a 42" profile Ringmaster (designed by Matt Kania) was wondering what the final weight should be? I've got 2 engines to try s.c.25 or asp .21 or maybe neither is really powerful enough I don't know for sure. Its not for competition use just sport flying, loops, lazy 8s, wingovers Any comments would be much appreciated thanks..
I don't know what an SC 25 is, but I would expect an ASP 21 would probably be fine - quite preferable to a McCoy or Fox 35 as far as I am concerned. I would start with an APC 9-4 and let 'er rip. I have seen quite a few kit versions with 15FPs and they flew just great, so just about anything you scratch-build is likely to be lighter and better.
As Floyd mentions, there are *many, many* previous threads here and on SSW on this topic, what to change, and how to set up the airplane. Mostly, it's about beefing up the weak points (wing/fuse joint and bellcrank mount), where you can safely save weight, and were you better leave it alone. After 60 years and recently several World and National champions worked it out, it's a solved problem.
With the wrong (old) engines and the classic trim setup, it's the same barking dog it was back in the 50's. With the right engine and proper trim setup, it's fully capable of flying 500-point stunt patterns. A classic example of the fact the trim and power are vastly more important than the design.
Brett
Topic: Profile Ringmaster (Read 1319 times)