stunthanger.com
General control line discussion => Open Forum => Topic started by: Bootlegger on August 14, 2007, 08:16:28 AM
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Mornin Guy's,
I posted this on another thread and am lookin for the answer.
I have a kit built P Force that flies like it is nose heavy.
I have an OS 32 SX with apc prop, stock muffler and a 1oz brass prop washer.
I had to do this to get the c/g where Mike indicated it on the plans (2" back of l/e at fuse)
Like I said it flies nose heavy, but I sure don't want a tail heavy model.
How about some suggestions...
T I A
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Are you getting full control deflection? Also it could be your handle spacing. But, don't be afraid to add a little tail weight. I don't know how the 32 compares to a LA 25 or Fox 35, but, I have not added tail weight to either one. I would start off first by getting rid of that 2 ounce spinner nut. Also is the measurement equal to the spar location? Have fun, DOC Holliday
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Gil,
I'm really surprised that a kit (as opposed to the ARF) needed all that nose weight to balance. The only ones I have seen balanced OK with an FP or LA 25. Your OS32 must weigh over 9 oz with the stock muffler! I assumed that the ARF needed a lot of nose weight (8.5 oz engine) due to heavy wood in the fuselage. If I were you, I would try removing the brass weight on the engine shaft and fly it again. This should tell you if it is a nose heavy condition you are dealing with without moving the CG to an unflyable situation. My ARF balances at 2 inched back from LE and it really turns.
Steve
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Mornin Guy's,
I posted this on another thread and am lookin for the answer.
I have a kit built P Force that flies like it is nose heavy.
I have an OS 32 SX with apc prop, stock muffler and a 1oz brass prop washer.
I had to do this to get the c/g where Mike indicated it on the plans (2" back of l/e at fuse)
Like I said it flies nose heavy, but I sure don't want a tail heavy model.
How about some suggestions...
T I A
Hi Gil,
I know it is properly "square", but just how much line spacing do you have? Billy once told me NOT to add tail weight to a plane but to first increase the elevator throw and widen the line spacing....... Worth a shot.
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Guy's, Sure do 'ppreciate all the reply's .. The line spacing is 4" just like the old Hot Rock small handles. The l/o's are where Mike suggested, so I think that will be close.
I am gonna try to drop the brass flywheel washer and see what that does, oh the throws are about 40-45 deg each way.
Another flyer with P Force has his c/g at about 2 3/4" back of the wing and it isn't sensitive at all, when flyin' or landin'.
His is powered by an Older OS 35 S with tongue muffler, and I think a wooden prop. ??? So I know that engine doesn't weigh what the OS 32 SX with ball bearings weighs...
Again thanks for the help...