34 ^ _ ^ W t A - ^ ^ FT"TGHT. Ta "^lRCRAfT ENGINEER

FLIGHT, January 8th, 1941

AIRCRAFT/SECTIONS The Importance oj^J^rsionaTa^fei/ as Flexural Rigidity in Sfee/ Alloys,

/Aluminium AjjfisKand Magnesium Alloys E. Vk THOMAS^h.D. , /M.Sc . , A.M.I.C.E., A.M.I.Struct.E.

IN early structural design\strutsjwere env^geda*ngid members of robust prnpIWi on