GP Stearman Incidence Question
11-27-2004 | 03:42 PM
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From: Seymour,
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GP Stearman Incidence Question
My GP Stearman was going along great until it came time to mount the top wing. With the N strut brackets and N struts mounted and the cabanes mounted to the top wing with all the screws still loose in all these parts I am getting a bad fit of the cabanes to the fuse. If I gently force the cabanes to the fuse the top wing incidence is +3 degrees with the bottom wing and tail at 0. Have any of you experienced a similar condition and if so what did you do? The cabane mounting angles do not seem to fit well at all when mating up to the fuse. I have checked and rechecked to make sure the top wing brackets are on the top wing, etc. and the N struts are on correctly and the cabanes mounted correctly as well. The picture does not show well the gap that is between the fuse and cabane but it is approximately 1/4". Any advise is appreciated.
11-29-2004 | 06:38 PM
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From: Seymour,
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RE: GP Stearman Incidence Question
Bax, you are absolutely correct. That is exactly what happened. After changing the N struts to upside down and backwards to what they were the wing fits perfectly. The pictures show how the it is set up now with the correct fit. Please note that the instruction manual clearly states that the arrows on the struts are to be up and forward. Now that the arrows are down and pointing to the rear everything is fine. I can only hope that I have the only kit that was marked incorrectly but I have my doubts on that. There definately needs to be some mention of wing incidence in the instruction manual. Without it, a new modeler could end up with a real mess on his hands that does not fly well at all.
11-29-2004 | 09:15 PM
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From: ypsilanti, MI
RE: GP Stearman Incidence Question
Mr Scale,
I think you will find that setting the top wing incidence to negative 2 degrees (leading edge down) will improve at least three things; pitch coupling during knife edge flight, inverted fligtht stability, and landing ease. If it's not practical to do this, raise the upper wing's ailerons a quarter inch when in the neutral position.
Regards,
DrGO
I think you will find that setting the top wing incidence to negative 2 degrees (leading edge down) will improve at least three things; pitch coupling during knife edge flight, inverted fligtht stability, and landing ease. If it's not practical to do this, raise the upper wing's ailerons a quarter inch when in the neutral position.
Regards,
DrGO
