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ultra stick 33 cc incidence

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ultra stick 33 cc incidence

Old 09-13-2022, 08:18 AM
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Default ultra stick 33 cc incidence

If the cg is correct and the plane wants to go down while flying and requires a lot of up elevator could the wing incidence be wrong?
Does anyone know what the correct wing incidence is for this Hangar Nine ultra stick 33 cc.

Old 09-15-2022, 06:11 AM
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I’m pretty certain that the H9 Sticks are built to 0-0-0 meaning that the thrust line, wing and stab are all set to zero. This reflects the era in which the original Phil Kraft Ugly Stik was designed.

However when dealing with a symmetrical airfoil, it will not produce any lift unless it is being flown at a positive angle of attack. With the setup you have, it requires up trim to provide that positive AOA. The fix that I would perform is to add positive wing incidence in the neighborhood of 1 degree. I also wouldn’t discount the idea of moving the CG back a little but would start with the incidence change first. The goal will be to get the incidence and CG working together to eliminate any required elevator trim.

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