These rotary engines were largely obsolete by the 1920s, but recent upsurge of interest in WW1-era aircraft has led to the creation of a small demand for them.

John Elliot’s Fokker Triplane at Warrenton-Fauquier Airport in Virginia has succesfully been installed with a 1918 LeRhone rotary engine, which had not run since November 12, 1918, and which had ...