Walter R 1-203

The Walter R 1-203 was a liquid rocket engine designed by the German inventor Hellmuth Walter .

It was developed in 1938 as a test engine. It is based on the "cold" Walter drive . As a result, there was no combustion in the combustion chamber , but the two fuel components decomposed at around 700 degrees. T-material (hydrogen peroxide) and Z-material were used as fuel . The engine could be regulated continuously via turbo pumps. The pumps were powered by chemical steam from T-Stoff and Z-Stoff (aqueous solution of sodium or potassium permanganate ). The maximum thrust of 300 kilopond (4.9 kN) was maintained for 60 seconds. The test engine was used to drive the Heinkel He 176 , the world's first functional rocket aircraft. A similar engine was later used on the DFS 194 .

This engine formed the basis for further rocket propulsion, especially the Walter RII-203 of the Messerschmitt Me 163A and the Walter HWK 109-509 of the Me 163B and the Bachem Ba 349 "Natter".