Douglas C-133 CargomasterDouglas C 133 Cargomaster airplane model. The C 133 was a four engine, turboprop transport that surpassed earlier Douglas military cargo airplanes in size and speed. Remarkably, the Cargomaster entered production without a prototype and featured a distinctive circular fuselage with wings mounted on top. Capable of flying the equivalent of 22 loaded railroad boxcars nonstop from Los Angeles to New York at approximately 5 cents per ton per mile, the C