Hello netters,over here in Germany ,I had to do a spar and WAF load test for my Kr. Mr. Otto Bartsch from the OUV(the German association for experimentals and a aerodynamic ingeneer at Messerschmitt Boelkow Blohm (MBB) did a very simple but efficient Job.To demonstrate the strength of the spars he did not covered them with plywood.He also wanted to see If the bolts would split the wood under high loads. The complete test was very successful. The very slightly bent on the WAF's ( pic far right) was the result of a not calculable load (more than 7 g's supposed by Otto Bartsch) caused by an aprupt stop of the loading shovel.To prevent this bending under very high loads,Otto Bartsch recommended to switch to an one bolt systhem.I hope that the documentation is instructive on the basis of the fotos .
Herbert F?rle, Gemany Kr https://www.dropbox.com/s/jvxw8xdz990kwn0/SWScan00013.BMP?dl=0 Von meinem iPad gesendet
