Engine Model: LR54. Government Designation: XLR54-NA-1. Designer: Rocketdyne. Application: F8U-1. Propellants: H2O2/Kerosene. Thrust(vac): 26.400 kN (5,935 lbf). Chambers: 1. Country: USA. After the failure of the Reaction Motors XLR-40 for use in the F8U-1 fighter, Vought elected to continue the project using a Rocketdyne XLR-54 engine which gave 6000 pounds of thrust. Although the project never reached flight status, dummy engines were installed above the F8U-1's tail cone just behind the rudder.