Experimental Hall X-1 "Aft-Wing" Structural Framework and Static Testing (Circa 1929)

The uncovered tubular steel fuselage and wooden aft-wing framework of the experimental Hall X-1 on a test bench with a sandbag ballast. — Experimental Hall X-1 "Aft-Wing" Structural Framework and Static Testing (Circa 1929) · Donald A. Hall Estate Collection

An extraordinary technical artifact documenting Donald A. Hall Sr.'s independent post-Ryan aerospace research, this negative captures the uncovered airframe of his experimental Hall X-1 Aft-Wing design. Resting on a factory wooden horse stenciled Assembly, the airframe undergoes static structural load testing with a sandbag ballast suspended from the tailskid. The image details the welded steel-tube fuselage truss, fabric-ready vertical fin, and large cantilevered tandem aft-wing lifting surface engineered for stall-resistant flight under Hall's landmark U.S. Patent 1,895,458.