Douglas C-133B Cargomaster

The C-133 was the first U.S. Air Force transport to use turbo-prop engines. The Cargomaster was designed to carry complete Inter-continental Ballistic Missiles. Later C-133s were built with clamshell rear loading doors that allowed the Titan missile to be carried in one piece rather than disassembled. The Cargomasters only served from 1957 to the early 1970s due in part to serious problems with metal fatigue in their long thin fuselages. A total of fifty C-133s were built.