Walter HWK 109-500

Walter HWK 109-500 as a cutaway model in Cosford

Walter HWK 109-500 with umbrella package (left) on an Arado Ar 234

Arado Ar 234 with Walter launchers

The Walter HWK 109-500 was a liquid rocket engine in World War II . It worked with the "cold" Walter drive , i. That is, instead of combustion, only a chemical reaction took place. T-Stoff ( hydrogen peroxide ) and Z-Stoff (aqueous solution of sodium or potassium permanganate ) were used as fuel. The engine was combined with the fuel tanks in one container to form the start-up rocket. It delivered approximately 500 kp (4.9 kN) of thrust for 30 seconds  . From 1937 mainly heavy bombers or cargo gliders were using this start-up rocketfitted. After take-off, the reusable Walter launch rockets were dropped and floated to earth on a parachute stowed in the front of the engine.

Web links

Commons : Walter HWK 109-500  - Collection of pictures, videos and audio files

• Walter HWK 109-500, Working Group Historical Air Force Berlin