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The German X-4 was a small air-to-air missile of World War II that could be fired at heavily armed Allied bombers from a distance. To prevent jamming, guidance was by wires running between the missile and launch aircraft, rather than by radio. Slated for use on the Me 262 jet fighter, the X-4 could also have been fired from such piston-engine aircraft as the Ju 88, Ju 388, and Fw 190, all of which launched test missiles beginning in August 1944. Ruhrstahl produced 1,000 X-4 airframes in late 1944, but an Allied air raid destroyed the BMW engines and production lines, a blow from which the program never recovered.

The Smithsonian obtained these skin panels from the X-4's rear fuselage as part of the the U.S. Navy Bureau of Aeronautics' transfer of World War II missile artifacts in 1948.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin Germany Type CRAFT-Missile & Rocket Parts Manufacturer Ruhrstahl AG
 Dimensions Overall (Each Panel): 2ft 7/8in. x 4 7/8in. x 1in. (63.18 x 12.38 x 2.54cm)
 Materials Galvanized steel
Tinned copper?
Rubber (Silicone)
Synthetic Fabric
 Inventory Number A19510069000 Credit Line Transferred from the U.S. Navy Bureau of Aeronautics Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.