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Load Test Question

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proppastie

Well-Known Member
Joined
Feb 19, 2012
Messages
6,390
Location
NJ
I am at the 40% of my load test of the Aluminum Dragon. The total weight is 698 lb. on the LH wing for 5.33 Gs......The current weight loaded is 279 lb. which translate to 2.1 G..... I am getting serious oil canning on the buckling side (lower side) of the leading edge. The web and caps are not wrinkling or buckling. Is this normal, should I add span wise stiffeners to the first two bays.? I was taught the spar handles the bending. I may have reached my Peter Principal here.

When I remove the weight there is no permanent deformation (yet).

Shown sand bags in 10% increments. 20% to 100% Tractor jack to lessen tire deflection. Pictures of the leading edge deformation.

IMG_1153.JPG IMG_1155.JPGIMG_1157.JPG IMG_1158.JPGIMG_1160.JPG
 
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