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Metal Construction Development. Part II : Strip Metal Construction - Wing Spars (1929)
NASA Technical Reports Server (NTRS) · leaf 24
Fig. 7 W I V ^*-13.25^ -13. 25^-^ -28" FiR.5 ^;l"r Developed, width 2.014 1.995 2.269 Radius of gyration® .0786 .1123 .1774 ©about axis through C.G. and parallel to flats. Thickness of material in each case .015" Fig.6 Fig.14NASA Technical Reports Server (NTRS)
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