First Liquid-fueled Flight
Goddard began experimenting with liquid oxygen and liquid-fueled rockets in September 1921, and tested the first liquid-fueled engine in November 1923. It had a cylindrical combustion chamber, using impinging jets to mix and atomize liquid oxygen and gasoline.
In 1924–25, Goddard had problems developing a high-pressure piston pump to send fuel to the combustion chamber. He wanted to scale up the experiments, but his funding would not allow such growth. He decided to forgo the pumps and use a system applying back pressure from an inert gas.
On December 6, 1925, he tested the simpler back-pressure system. He conducted a static test on the firing stand at the Clark University physics laboratory. The engine successfully lifted its own weight in a 27-second test in the static rack. It was a major success for Goddard, proving that a liquid fuel rocket was possible. The test moved Goddard an important step closer to launching a rocket with liquid fuel.
Goddard conducted an additional test in December, and two more in January 1926. After that, he began preparing for a possible launch of the rocket system.
Read more about this topic: Robert H. Goddard
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