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Scratch built split flap question

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Old 08-14-2006 | 07:10 AM
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LDM
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Default Scratch built split flap question

Just added split flaps to a 66 "arf Seafury . Made the bottom out of carbon fiber reinforced flite skin . My problem is that one side fits and closes like a glove , the other is off -about 1/16 of an inch , meaning that it seems to stick out and not be flush with the existing wing structure .
Will this create a airleron effect with major trim problems ? I dont know if sanding will get this as flat as i need this to be .

Also any suggestion of how deflection I need on this plane ?? 66" size , 120 engine
thanks
Ldm
Old 08-14-2006 | 10:55 AM
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Default RE: Scratch built split flap question

Major trim problems? No. Possibly even no trim problems.
It won't be a factor.
Old 08-14-2006 | 11:37 AM
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Default RE: Scratch built split flap question

Eh?
Tall Paul - I'm confused by your reply. I would have thought that this would cause a bit of an assymetric flap kind of situation?? Surely it will artificially increase the camber on one wing section?

cheers
Rick
Old 08-14-2006 | 12:02 PM
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Default RE: Scratch built split flap question

By your question, I assume that only one flap has the disagreement, and that the other flap fits properly. I would expect no significant trim changes with only .062" discrepancy on a 66" wing.. Whatever slight amount of roll that may be induced can be trimmed out... Would bug me to see misaligned flaps, tho', so would be looking to fix it for aesthetic reasons...

Dunno the specifics for the SeaFury, but split flaps usually have 45-60 degree max deflection, although nothing but fear would keep you from going to 90

Cheers!

Jim
Old 08-14-2006 | 12:22 PM
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Default RE: Scratch built split flap question

ORIGINAL: spad

Eh?
Tall Paul - I'm confused by your reply. I would have thought that this would cause a bit of an assymetric flap kind of situation?? Surely it will artificially increase the camber on one wing section?

cheers
Rick
.
That amount of difference is too small for the plane to notice much, if at all.
On my DynaFlite PT-19, I think have more than that. The usual inaccuracies in keeping the surfaces to what a perfect surface would be will be more noticeable on models.
There are usually so many of these they cancel each other out.

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