This is a model of unknown scale of the AIM-4D, one of several different Falcon short range air-to-air missiles developed by Hughes Aircraft for the U.S. Air Force. It had a range of 6 miles, a maximum speed of Mach 4, a conventional warhead, and an infrared homing unit for guidance. The missile saw limited service in the 1960s. John and Cynthia Heyde donated this model to NASM on an unknown date.
This object is on display in James S. McDonnell Space Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.