Parasol-Wing Training Monoplane Outside Corrugated Hangar (Circa 1924)

A parasol-wing monoplane with an uncowled rotary or radial engine parked outside a corrugated metal hangar as a young pedestrian walks past. — Parasol-Wing Training Monoplane Outside Corrugated Hangar (Circa 1924) · Donald A. Hall Estate Collection

Resting outside a long corrugated metal hangar, a parasol-wing monoplane trainer—matching the French-designed Morane-Saulnier MoS-30 evaluated by the U.S. Army Air Service—sits on the dirt ramp with a youth in a heavy winter coat walking past. Featuring swept wing struts, an open front engine bay, and circular rudder insignia, the negative illustrates the foreign and domestic parasol airframes Hall analyzed while compiling wing efficiency data.