I do not know. For one off - making an extra half wing is cheaper than funeral.A tall order isn't it. Can't you just test to a an acceptable load and stop there before damaging anything?
Anyone familiar with Sonja / Sonja Englert Engineering? Lots of information on her web site: Flight Test | Sonja Englert Engineering Links to two tutorial videos here: https://www.caro-engineering.com/news BJCwww.homebuiltairplanes.com
Sonja's pricing seemed very reasonable to me, may want to talk to her.
In some situations - maybe.Can't you just test to a an acceptable load and stop there before damaging anything?
But not your number. Plus some parts like skin will mess all your numbers.. just too high deflectionIf you have a proven structure that is designed to say 9G U/6 G L then you might get away with testing to 4.4G and measuring deflection without fear of damaging the structure to verify quality.
For single skin i always remeber construction of Cri-cri. And you cant beat mrs. Colomban on weight effiency.. Yes, it is on part of black aluminium, but still.. 1.8" ribs spacing but only single thin aluminium skin. Revatched all videos with cri-cri acrobatic, no cannig found.Yup, lots of variables. The BD-5 wing is a good example of the skin problem. The wing is strong enough but the skin permanently wrinkles before the spar starts to yield.
So happy to hear from you! Have watched all your videos and am a very great fan. Should I PM you with more details?That does not sound too complicated. I would have to run some numbers to get the loads and need the dimensions of the wing, weights and speeds.
I was able to get only limited data on bd4 wing 24" ribs spacing two or three layers of 7 oz fiberglass, and too many leaks. And yes, adding some stiffneres to make ribs spacing 12" was necessary..Don't have a link. Juan's site has been down for years. Maybe WayBack?
It was/is a well known 'problem' in the BD-5 world. There is/was a spar insert that was designed to eliminate the problem after doubling the number of ribs and/or shin thickness didn't fix the 'problem'.
I do not remember at what load the 'problem' manifested. Could have been past limit but I don't remember a "G" load being given by those that experienced the problem. Could have been past the tested limit load given that some of the BD-5s were likely flown rather aggressively?