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Engine Model: XLR13-AJ-5. Manufacturer Name: X45ALD-4000. Government Designation: XLR13-AJ-5. Designer: Aerojet. Developed in: June 1948. Application: B-29 ATO. Propellants: Nitric acid/Amine. Thrust(sl): 17.600 kN (3,957 lbf). Burn time: 60 sec. Country: USA.

Development begun June 1948. Ceramic chamber and nozzle, nitrogen pressure-fed, droppable but no recoverable.

Engine Model: XLR13-AJ-7. Manufacturer Name: X60ALD-4000. Government Designation: XLR13-AJ-7. Designer: Aerojet. Developed in: 1948. Propellants: Nitric acid/Amine. Thrust(sl): 17.600 kN (3,957 lbf). Burn time: 60 sec. Mass Engine: 363 kg (800 lb). Diameter: 0.81 m (2.65 ft). Length: 3.43 m (11.25 ft). Chambers: 1. Chamber Pressure: 21.00 bar. Country: USA.

Modification of -AJ-1. Regeneratively cooled by fuel, droppable.

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