 Most were built under license by the Burgess Company of Marblehead, Massachusetts.Fifty others were assembled after the war, from spare components and engines by the U.S. Navy at Naval Air Station Pensacola in Florida.Although the consensus in early 1917 among aviators and even the N-9s manufacturer was that the N-9 could not be looped, the pioneering early United States Marine Corps aviator Francis Thomas Evans, Sr., believed it was possible.