 An order for 16 was placed by the United States Army before the prototype flew, but the prototype was disappointing and the US Army cancelled its order for H-14s.The prototype was converted to a single-engined aircraft powered by a 200 hp (149 kW) Curtiss V-X-X engine, also in a pusher configuration, during 1917, being redesignated as the Curtiss HS-1 (for H model with single engine).The prototype was re-engined for use as a testbed for the new Liberty 12 engine, becoming the HS-1L, flying in this form on 21 October 1917.