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General control line discussion => Open Forum => Topic started by: phil myers on March 18, 2010, 03:15:08 PM
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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..
Phil
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Hi Phil. Many Ringmaster EXPERTS on this forum, so you will get lots of answers (most all different). My own advice is; either of your 2 engines should be fine. Pick the lightest one. A Ringmaster will fly OK at 30 oz., but much better closer to 25. You can do like I did, and build up the fuselage, wing leading edge, and forget paint (use colored silkspan). I have one at 17 oz. with an OS 15, and another at 23 oz (OS 25). Of course, these lite mods don't take well to crashing!
Floyd
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Do a search on Ringmaster and settle back for some reading. H^^
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Just go here and ask anything you like on the S1 Ringmaster. They will answer all the questions you can come up with. y1
http://www.brotherhoodofthering.info
Stand by to be amazed. LL~
"Billy G" D>K
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Thanks for the info guys. I've got lots of reading to do now! I was hoping my ASP .21 would be ok to use, its had 1hrs running in and will turn 9x4 apc at 11700 rpm with 'straight' fuel (+r/c carb).
Cheers Phil
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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