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proppastie

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Well on the other side of the coin...the Aluminum Dragon Spar using the EAA Metal Design Spread Sheet is 5.33 limit....8 ultimate, x 1.5 FOS = 12.......mostly because I do not trust my stress analysis expertise more than anything else. Will be load tested to 5.33, (hope it passes)
 
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Pops

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You are completely correct in gust loads can get very large. Why the negative G strength is so important. The JMR is placarded for "No Aerobatics" even though rated at 6.7 G's. Always wondered about the Tailwind with the small single strut with no jury struts in the negative G loading.

Thank you. Saying the same thing in Redneck talk :)
 

Pops

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Well on the other side of the coin...the Aluminum Dragon Spar using the EAA Metal Design Spread Sheet is 5.33 limit....8 ultimate, x 1.5 FOS = 12.......mostly because I do not trust my stress analysis expertise more than anything else. Will be load tested to 5.33, (hope it passes)
Why I did not subtract the weight of the wings. Want to error on the conservative side. So the JMR is really stronger than the rated 6.7 G's with the 50%.
 
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