Only one Monocoach H was built but it acquired many names. It was sometimes the Twin Monocoach and also the Monocoupe H Monocoach, Zenith and Zephyr, the last of which applied to the Menasco-powered version in the photo . The name used here is the manufacturer and model in the US civil register. Lambert was acquired by Monocoupe and it continued to promote the aircraft. Jane's called it a Monocoupe but no aircraft were built by that company. Monocoupe was the registered owner when N15433 was cancelled in 1948. Photo by: Rudy Arnold / Smithsonian Institution