X-405 Manufacturer Name: X-405. Government Designation: LR50-GE-1. Designer: General Electric. Application: Vanguard 1st stage. Propellants: Lox/Kerosene. Thrust(vac): 134.800 kN (30,304 lbf). Thrust(sl): 123.800 kN (27,831 lbf). Isp: 270 sec. Isp (sea level): 248 sec. Burn time: 145 sec. Mass Engine: 191 kg (421 lb). Diameter: 1.14 m (3.74 ft). Chambers: 1. Chamber Pressure: 42.00 bar. Area Ratio: 5.50. Thrust to Weight Ratio: 71.96. Country: USA. First Flight: 1957. Last Flight: 1959. Flown: 12. X-405 used on Rocket Stages Used on stage: Vanguard. on launch vehicle: Vanguard.                   Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2007 except where otherwise noted.

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