stunthanger.com
Design => Stunt design => Topic started by: Greg L Bahrman on June 17, 2006, 10:13:03 PM
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Remember when we were kids and I build my Ringmaster. Man that thing had a minimum of 1 inch rudder offset maybe more. So far all my recent planes have had adjustable rudders and thats a good thing because after watching Brett trim a plane, the first thing he did was cut the rudder off and re-glue it close to straight. So I went back and adjusted my rudders close to straight and the planes flew better. So my real question is should I continue to make adjustable rudders or are we advanced enough or knowledgeable enough to be able to say that making an adjustable rudder is a waste of time. Just glue it on your Magnum almost straight and be done with it. Your thoughts please...
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I have built a couple of airplanes with wing structure which made adjustable leadouts unpractical. I made them with adjustable rudders and got them flying pretty good. Doing an adjustable rudder as an experiment is a good thing just to be able to see what it does for you. I think the ideal, which I've never done, is both adjustable leadouts and adjustable rudder.
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So my real question is should I continue to make adjustable rudders or are we advanced enough or knowledgeable enough to be able to say that making an adjustable rudder is a waste of time. Just glue it on your Magnum almost straight and be done with it. Your thoughts please...
If I was going to make something unadjustable, I would be more tempted to make the leadouts fixed, rather than the rudder. But that doesn't mean it's a good idea.
I think the rudder is far more critical. Not so you can dial in more offset to get more line tension, but, to cover building errors and day-to-day variations in the models alignment. You'd be amazed how much the alignment changes from moment to moment through the day.
Brett
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Thanks Jim, Thanks Brett
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It is certainly NOT a trivial exercise to make and install an aerodynamically neutral fin/rudder. Even if it LOOKS straight, it might not be....and there is always the offset prop wash vector that makes it impossible to pre-determine.
Why not? its an easy thing to do.