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XLR25-CW-1

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AKA: LR25. Status: Out of Production. Thrust: 66.88 kN (15,035 lbf). Height: 1.45 m (4.75 ft). Diameter: 0.46 m (1.50 ft).

Upper chamber was 2270 kgf and lower chamber 4540 kgf. Duration 175 seconds at full power or 650 seconds at 1140 kgf. Bell was to have provided the engine, but their contract was cancelled due to cost/technical problems. The X-2 engine was developed by a rocket team that had been founded by Goddard at the Naval Engineering Experiment Station at Annapolis, Maryland. During 1942-1945 the team had developed a variable-thrust rocket motors. This required hundreds of proving-stand tests, but eventually producing a successful motor, later used on the Bell X-2 rocket plane.

Chambers: 2. Throttled thrust(vac): 1,140.000 kN (256,280 lbf). Engine: 157 kg (346 lb). Thrust to Weight Ratio: 43.43.