1958•NASA STI Repository (National Aeronautics and Space Administration)Open access
A correlation of results of flight investigation with results of an analytical study of effects of wing flexibility on wing strains due to gusts
C C Shufflebarger, Chester B Payne, George L. Cahen
Open full text 1 citations
Abstract
An analytical study of the effects of wing flegibility on wing strains due to gusts has been made for four spanwise stations of a fourengine boniberairplane, and the results have been correlated with results of a previous flight investigation.The measured bending-strain amplification factors due to wing flegibility (ratio of strain for the flexible airplane to strain for the "rigid" airplane) at a station near the wing root were Log when based on the ratio of root-mean-square values and approximately 1.19 when based on the ratio of strains obtained from distributions of strain pesks.The amplification factors decreased with b each successive outboard station and then increased slightly at the tip station.When the airplane was considered to have three degrees of freedom (vertical motion and wing bending in the first and second symmetric bending modes), calculated amplification factors were in reasonable agreement with the measured results.
Open-access reader