In autumn of 1936 Dornberger asked Thiel to move from fundamental research to Wa Prüf 11 at Kummersdorf’s western testing ground. All topics regarding the engine were assigned to Thiel, and he had to further advance the propulsion, which he managed in a very short time.
Thiel’s groundbreaking ideas for the rocket engine would lead to a
significant reduction in material, weight and work processes, as well as a
shortening in the length of the engine itself. Thiel and his team also defined
the fuel itself and the best ratio of mixture between ethanol and liquid oxygen
for the engine.
Please read detailed information about the two topics in the following subitems: Fuel Optimization and Rocket Engine Development.