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Sig Mustang 450

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Old 10-19-2011, 09:52 AM
  #1
kenh3497
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Default Sig Mustang 450

I'm in the process of finishing a build on a Sig Mustang 450 I started 30 or so years ago. I know this airplane was outdated almost if not before it left the factory!! Anyway, the directions suggest 2 to 3 inches of dihedral under each wing tip. This seems more that excessive. Any suggestions? I was thinking flat across the top and let the natural taper of the wing set the dihedral on the bottom????? It will be a sport flyer only and I think I'm going electric. The wing is under cambered at the tips and is supposed to have about 3/16" washout though mine looks like it will wind up at about 1/8".

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Ken
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Old 10-19-2011, 10:38 AM
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djlyon
 
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Default RE: Sig Mustang 450

yup it's to much dihedral. It's based on old radios and receivers that often needed a little help with stability. I just finished an old Jack Stafford formula 2 mustang that called for the same dihedral. I reduced it to what I thought looked good. It came out 2.5 inches total or 1.25 per tip. It fly's great. It's is the 600 sq.in. wing.

Denis
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Old 10-22-2011, 04:41 PM
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kenh3497
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Default RE: Sig Mustang 450

I flipped the wings down side up and measured the dihedral with a flat top. It is around 1 1/2 inches. I'm thinking maybe not quite enough, so I think I'll set it a 2 to 2 1/4 inches. It's going to a "what ever looks good" dihedral setting
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