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#1
June 27th 06, 04:18 PM
posted to rec.aviation.homebuilt
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Flying wires
Just out of curiosity, I notice that all of the Pitts aircraft have
flying and landing wires attached on only the main spars, and the Acro Sport aircraft have them attached on both the main and rear spars. From what I have seen, the wings on both aircraft aren't made much differently, and I can't imagine the stresses ( wing twist ) being any greater on the Acro Sport than the Pitts. Anyone know offhand why the extra wires on the Acro Sport? thanks Neal 
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#2
June 27th 06, 08:04 PM
posted to rec.aviation.homebuilt
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Flying wires
Neal:
The wing on the Pitts is swept while the wing on the Acro Sport (based on the old Gere Sport) is a straight Hershey bar wing. Consider how the average location of the lift on the swept wing of the Pitts is more in line with the wire, or perhaps even in front of it between the wire and the cabane attach point,... I haven't done the math. But on the Acro Sport, that average lift location is behind the wire, thereby requiring a wire on the rear spar to compensate for the twist imparted on the wing when the fulcrum point is the front spar. Scott wrote in message ups.com... Just out of curiosity, I notice that all of the Pitts aircraft have flying and landing wires attached on only the main spars, and the Acro Sport aircraft have them attached on both the main and rear spars. From what I have seen, the wings on both aircraft aren't made much differently, and I can't imagine the stresses ( wing twist ) being any greater on the Acro Sport than the Pitts. Anyone know offhand why the extra wires on the Acro Sport? thanks Neal
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#3
June 27th 06, 10:32 PM
posted to rec.aviation.homebuilt
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Flying wires
Thanks Scott....now I know.
Neal Scott Rodriguez wrote: Neal: The wing on the Pitts is swept while the wing on the Acro Sport (based on the old Gere Sport) is a straight Hershey bar wing. Consider how the average location of the lift on the swept wing of the Pitts is more in line with the wire, or perhaps even in front of it between the wire and the cabane attach point,... I haven't done the math. But on the Acro Sport, that average lift location is behind the wire, thereby requiring a wire on the rear spar to compensate for the twist imparted on the wing when the fulcrum point is the front spar. Scott wrote in message ups.com... Just out of curiosity, I notice that all of the Pitts aircraft have flying and landing wires attached on only the main spars, and the Acro Sport aircraft have them attached on both the main and rear spars. From what I have seen, the wings on both aircraft aren't made much differently, and I can't imagine the stresses ( wing twist ) being any greater on the Acro Sport than the Pitts. Anyone know offhand why the extra wires on the Acro Sport? thanks Neal
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