Engine Model: XLR71-NA-1. Government Designation: XLR71-NA-1. Designer: Rocketdyne. Developed in: 1950. Application: Navaho II booster. Propellants: Lox/Alcohol. Thrust(sl): 533.700 kN (119,981 lbf). Isp (sea level): 245 sec. Country: USA. Status: Development cancelled 1955. Planned engine for the booster of the Navaho II test vehicle. Gas generator, pump-fed. Thrust and specific impulse values are at sea level. Two would have been installed per booster. Cancelled in favor of a version of it burning kerosene instead of alcohol fuel, the LR-83.
