Engine Model: LR8-RM-5. Government Designation: LR8-RM-5. Designer: Reaction Motors. Application: Manned rocketplanes. Propellants: Lox/Alcohol. Thrust(sl): 26.670 kN (5,996 lbf). Mass Engine: 157 kg (346 lb). Diameter: 0.46 m (1.50 ft). Length: 1.45 m (4.75 ft). Chambers: 4. Chamber Pressure: 17.00 bar. Country: USA. Status: Out of Production. Advanced version of the LR-11, 4 chambers, thrust 2700 kgf at sea level. The installation in the X-1E was modified in 1958 to increase chamber pressure to 20 atm and burn Hydyne fuel.