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Mar 12, 2007, 05:10 PM
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birdseed's Avatar
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Is dihedral on a delta wing bad?


Hi all,
Im just glued a wing to a eurofighter, the instructions state the bottom surface should be level, but ive managed to put about 2 degrees dihedral onto the wing.

How bad news is this? Not that i can do anything about it now anyway.

( Its a PJP eurofighter 60" lenght , 40" wingspan)
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Mar 12, 2007, 05:26 PM
B for Bruce
BMatthews's Avatar
That much you'll never notice.
Mar 12, 2007, 10:40 PM
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vintage1's Avatar
I hope you are right. I made many delta chuck gliders in my youth, and often had to put anhedral on to eliminate 'dutch rolling'.

Needless to say there was very little science in these early design efforts
YMMV.
Mar 13, 2007, 09:07 AM
Registered User
I'm inclined to agree with V1 here, especially as the instructions are, in effect, telling you to put anhedral into the wing. I made a delta slope soarer which accidentally had a bit of dihedral, in order to prevent dutch roll, I chopped the tips and stuck them back on with anhedral to make a gull wing delta.

Which was a pile of crap

Suck it and see though, but if you can see a way to undo it, then it will probably be worth the effort.

Cheers
Mar 13, 2007, 10:35 AM
Registered User
probably the anhedral on the canard surfaces will help preventing the dutch roll tendency, though all highly swept wings seem to benefit from some anhedral.


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