[1] James V. Martin was a consultant to the U.S. Air service, and an associate to General Billy Mitchell.

When viewed from the side, the wing supports formed a letter "K" shape.

The aircraft featured air tanks, and electrical power for flightsuit heating.

The prototype K.III Kitten was donated to the National Air and Space Museum in 1924.

Martin K.IV was a model III with a more powerful 60 hp Lawrance engine and floats.