“Black Betsy”: The 6000C-4 rocket engine, 1945–1989. Part I

EUGEN SÄNGER - Meritorious Space Pioneer

“…New knowledge gained from the article led Wyld to opt for regenerative cooling. Based on this concept, he built a demonstration model rocket engine with a thrust of over 400 N and an exhaust velocity of over 2000 m/s [5,6,7]. The model rocket engine proved successful and was a basis and the reason for establishing Reaction Motor Inc. (RMI), the first corporation manufacturing special-purpose rocket engines.…”