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Old 07-29-2004 | 01:55 PM
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Campy
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Default RE: Incidence question

ORIGINAL: TuNeD PiPe

Hi all

I am busy putting a new horizontal fin on my Stick 60 and want know what the effects are of adjusting the incidence of the horizontal fin. (i.e what will the effect be if the horizontal fin has a bit of positive incidence , will it pitch up or down?)

>Positive incidence on the horizontal fin will cause it to pitch down.

>If no incidence is called out on the plans or in the instructions,
>set the incidence to 0 on the main wing and 0 on the horizontal fin.
>The main wing and horizintal fin should be parallel to the thrust line when
>setting the incidence.

Previously I had just glued the horizontal fin without worrying about incidence.Before I had to fly with quite a bit of up trim which I think is becasue the wing's incedence was slightly negative.That I can fix if I have to, by putting foam under the front of the wing.But before I glue the new horizontal fin in place I would like to know wether I should give it a bit of negative incidence or just make sure that it is parallel to the thrust line and then adjust the wing's incidence to make the plane fly level.Before I had lost a lot of travel on the elevator because I think the incidence was not right.I know that the C of G may also effect the pitching of the plane,but that I have set to be slightly nose-heavy).

Thanks!