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Engine Model: XLR20AJ-2. Government Designation: XLR20-AJ-2. Designer: Aerojet. Developed in: January 1946. Application: Lark. Propellants: Nitric acid/Gasoline. Thrust(sl): 6.660 kN (1,497 lbf). Country: USA.

Development begun January 1946. Blast turbine, three levels of thrust (600/1000/7500 lbf). Replaced NM Lark.

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