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misdrilled hole on on tubular aluminum spar question
"Rich S." wrote in message news "Orval Fairbairn" wrote in message news Am I missing something here? Is this a low wing or a high wing? Rich "Mid Wing" S. high wing- pat |
#12
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misdrilled hole on on tubular aluminum spar question
patrick mitchel wrote:
"Rich S." wrote in message news "Orval Fairbairn" wrote in message news Am I missing something here? Is this a low wing or a high wing? Rich "Mid Wing" S. high wing- pat In that case the strut will be in tension during flight, and compression while the microlight is on the ground (unless it's very windy). Either way, the best thing to do is consult the designer and do exactly what they say. Ed |
#13
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misdrilled hole on on tubular aluminum spar question
Capt. Geoffrey Thorpe wrote:
"Orval Fairbairn" wrote in message news In article , jerry wass wrote: patrick mitchel wrote: There's a discussion on a ul ng about a guy that built a strut braced light plane and in a fit of overkill (apparently ) decided to add a (non plans) jury strut. He drilled a hole (3/16") on the bottom of the tubular alum spar. Then realized he may have made a mistake. Whats the outcome and is there a fix without putting in a new spar. Just curious (and I didn't do it!!) Pat snip The strut is in tension and at an angle to the spar which puts a compression load on the spar. Aerodynamic forces between the strut and the root tend to lift the wing, which increases the compression on the bottom of the spar between the strut and root (supported at both ends).The moment applied at the strut from the outboard portion of the wing tends to put the top in compression, the bottom in tension. The net result (tension or compression) depends on the details of the geometry - how far out is the strut and what kind of angle is it at. In any case, I would want to put a doubler over the hole... You're SO RIGHT --I forgot to tack on the overhanging portion of the wing---Jetty -- Geoff The Sea Hawk at Wow Way d0t Com remove spaces and make the obvious substitutions to reply by mail When immigration is outlawed, only outlaws will immigrate. |
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