Propellant Tanks and Engine, BMW 109-558
- BMW (Bayerische Motoren Werke)
- This liquid-fuel rocket engine was most commonly used as the sustainer motor for the Henschel Hs 117 antiaircraft missile. Designed by the BMW rocket-engine group at Berlin-Spandau, under the direction of Helmut von Zborowski, the 109-558 used concentrated nitric acid as an oxidizer and a composite hydrocarbon mixture codenamed "Tonka" as fuel. Initial thrust was 375 kg (825 lb), falling to 60 kg (130 lb) in the last 24 seconds of burning as a result of falling tank pressures in the gas-pressurized tanks of the missile. In order for the Hs 117 not to exceed the velocity at which it was stable, the engine's thrust could be regulated. Gears on the head of the nozzle were mechanically linked to two flat sliding valves in the nozzle heads. The gears, missing on this artifact, were actuated by an electromotor regulated by a Mach meter.
- The U.S. Air Force transferred this artifact to the Smithsonian in 1949.
- Alternate Name
- BMW 109-558 Rocket Engine and Propellant Tanks
- Credit Line
- Transferred from the U.S. Air Force
- Inventory Number
- Restrictions & Rights
- Usage conditions apply
- PROPULSION-Rocket Engines
- Aluminum and magnesium cylinders.
- Overall: 1 ft. 1 1/2 in. wide x 8 ft. 1 in. deep (34.3 x 246.4cm)
- Country of Origin
- See more items in
- National Air and Space Museum Collection
- Steven F. Udvar-Hazy Center in Chantilly, VA
- James S. McDonnell Space Hangar
- National Air and Space Museum
- Record ID
- Usage of Metadata (Object Detail Text)
- Not determined
- GUID (Link to Original Record)