Experimental High-Wing Cabin Monoplane Engine Run-Up (Circa 1927)

Frontal view of an experimental high-wing cabin monoplane with an uncowled radial engine on a paved runway with wing markings. — Experimental High-Wing Cabin Monoplane Engine Run-Up (Circa 1927) · Donald A. Hall Estate Collection

An experimental high-wing cabin monoplane sits positioned on an airfield runway during an engine run-up, showing an uncowled radial engine fitted with a Hamilton Standard metal propeller. With experimental Department of Commerce registration lettering visible along the wing undersurface, Donald A. Hall Sr. recorded this aircraft during the intense period of commercial prototyping leading to the boom in American cabin monoplanes.