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This supercharger (Serial No. 1) was installed in the Wright Apache XF3W-1, Bureau No. 7223, flown by Apollo Soucek in 1930 when he made a world record altitude flight to 43,166 ft over Washington, D.C. This is a NACA. Model 2E Roots-type blower case built by the Allison Engineering Company for the U.S. Navy Bureau of Aeronautics. It is one component of the supercharging system that also included an air intake duct (or scoop), a driveshaft, intercooler, and exhaust. This system was connected to a Pratt & Whitney Wasp R-1340B engine that powered the XF3W-1 aircraft, and it made possible the high-altitude record.

 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 United States of America Type PROPULSION-Accessories (to an Engine) Manufacturer Allison Division, General Motors Corporation
 Physical Description Engine driven supercharger; twin shaft central compression design; system includes supercharger, 1 intercooler, 4-ducts, 1 lever, and 9 exhaust stacks; has 4 mount brackets. Dimensions 3-D: 43.8 × 50.8 × 39.4cm, 45.8kg (1 ft. 5 1/4 in. × 1 ft. 8 in. × 1 ft. 3 1/2 in., 101lb.)
 Materials Supercharger - Magnesium alloy
 Inventory Number A19350010000 Credit Line Transferred from the Navy Department, Bureau of Aeronautics Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.