 On March 4, 1911, he contracted early aviator Charles F. Walsh to build an airplane for use by his chief mechanic John Kiley at the Harkness camp established on North Island in San Diego, CA.Walsh delivered the plane to the aviation camp at North Island on April 7, 1911.This Harkness airplane was a Curtiss copy, but with four Farman-type ailerons mounted flush to the end of all four wings replacing the Curtiss-style ailerons normally located between the upper and lower wing.