The LR-101 is one of the most common
vernier thrusters utilized in American rocketry and has become a sought-after object for item collectors and
builders of amateur rockets. Rocket engineer
Robert C. Truax, who had led the initial design studies for the
PGM-17 Thor missile had planned on propelling his '
X-3 Volksrocket' with four Rocketdyne LR-101 engines, but despite many test firings the rocket never left the ground. On the 'Galactic Aztec', the engine used
RP-2 (Kerosene) as a propellant instead of
RP-1, which was utilized in the
SM-65 Atlas and
PGM-17 Thor ballistic missiles as well as the later commercial
Delta rockets. ==See also==