Spencer Heath Archive

Item 2215

Copied by Spencer MacCallum on May 27, 1960 from a draft of a letter by Heath that he found in a trunk in the attic at Roadsend Gardens, Elkridge, Maryland. The draft was undated, but MacCallum thought Heath had written it at the time of demonstrating at Boling Field in 1922 the first engine powered and controlled, variable and reversible pitch propeller.

   Propellers for the first Army dirigible, for the experimental Wright and Curtiss machines, for the first airplane to arise from the water, for the International Race Winner in 1910, for various Navy dirigibles, for the Navy Giant Boat, and for the N-C Trans-Atlantic flight were all furnished by me. Before the Great War my business was small and developmental in character but rose to a volume of several million dollars during the war.