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Discussion in 'Composites' started by PittsS1S, Oct 26, 2019.
Where to find your build log ?
In Member Project Logs with my name on it... https://www.homebuiltairplanes.com/forums/threads/billskis-fiberglass-bird.8344/
Thank you Billski
Today,after a long talk with my civil aviation administration,i am allowed to build my all spruce wings with my mods and to study,design a new set of carbon wings.I really thank all of you for your precious help to show me the path to follow
Another point of view for you to consider:
The internal structure in the Wolf wing, both the Wolf Pitts and the Wolf Pro, is almost identical to the standard design. Those wings have the high roll rates that you want, and require no additional bracing for torsion. All spars are 1/16” thicker (not taller), and the upper spar splice has an additional reinforcement that extends slightly outboard of the center section box. They use the plywood leading edge.
The wings are 12 g wings. They are light, pull with less drag (especially with the Wolf RV landing gear and the Wolf cowling), roll very fast, and have good aileron centering and feel without spades.
All of this is not intended to discourage you from designing composite wings for the Pitts fuselage. It is intended to encourage you, should you really want composite wings, to develop a clean, new, all composite design. Only by doing that is there a possibility of a slight performance improvement over the extant Wolf wings. Even then, the resulting aircraft will not score well in competition because of its small size.
Totaly agreed with you about the performances the Wolf wings give.
But there a cost for them as i am not in the US .At least 14000 Euros to get them here,and i need to have some tests done on the timber that will be used for the spars,that are mandatory for my civil aviation administration,so more Euros ...
I can build my wings as i have design them for less than 4000 Euros ,uncovered. So that let me 10000 Euros to build some carbon wings,only of course if i see this is possible and worths the work and the cost.
My spruce wings are a little different than the Wolf,but not so much.
Less area toward the tips,more toward the center.
Upper spars splices reinforcement as done by Wolf or Raven
Leading edge 2 x 8 mms birch plywood or biax carbon as well for the tips
Stainless drag and anti-drag wires ( i have them ) or titanium
Use of torque arms ( as done on the S1-11B) at the driven hinges,so one per wing
Blade ailerons hinges of 3/8" thick
10"3/4 ailerons chord almost full span
19" from front to rear spars instead of 19"1/2
3/8" taller spars all 11/16" thick
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