Z-Stoff was a name for calcium permanganate or sodium permanganate mixed in water. It was normally used as a catalyst for T-Stoff (high test peroxide) in military rocket programs by Nazi Germany during World War II.
Z-Stoff was used in the cold engine of the Messerschmitt Me 163 A airplane, in the earlier, self-contained HWK 109-500 Starthilfe RATO booster motor for manned aircraft (usually in pairs or multiples of two for such uses), and a smaller derivation of the Starthilfe unit, the HWK 109-507 booster engine used with the Henschel Hs 293 anti-ship guided missile. T-Stoff decomposed by Z-Stoff was commonly used by World War II German military to generate steam for powering of fuel pumps in airplanes and rockets.
- Lawrence Lowell (1945). "General Survey of Rocket Motor Development in Germany" (PDF). US Navy technical report. p. 19. Retrieved 2017-01-13.
- Note on "Walter Rockets" Archived June 1, 2006, at the Wayback Machine.
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