The S.P.C.A. 30 M.4 military airplane (French) : a multiplace low-wing airplane
This is a 1932 NACA aircraft circular issued by NASA's Technical Reports Server, describing the S.P.C.A. 30 M.4, a French multiplace low-wing military fighter aircraft prepared for engineers and aviation researchers. The two photographs show the airplane parked on a flat airfield from the side, one front-on view with its wings and fuselage, one a lower side profile with a three-bladed propeller and Lorraine engine. A designer could take from them the stark, functional silhouette of early-1930s military aircraft set against open grass and sky.
