Reaction Motors XLR-99 Rocket Nozzle no longer for sale
Rare X-15 Program Artifact

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Update: Sold

The Reaction Motors XLR-99 rocket engine nozzle sold for the buy it now price on eBay. The XLR-99 engine propelled the North American X-15 rocket plane in the 1960s. This is a museum piece that deserves a good home where it will be displayed to the public. It is 43 inches tall, 30 inches in diameter, and weighs about 200 pounds.

Reaction Motors XLR-99 rocket nozzle

The XLR-99 was a 57,000-pound thrust rocket that could be throttled by the X-15 pilot.

Reaction Motors XLR-99 rocket nozzle

XLR-99s powered the X-15s to speeds over 4,500 miles per hour and altitudes above 60 miles.

Reaction Motors XLR-99 rocket nozzle

Liquid Oxygen and Anhydrous Ammonia fuel were circulated through the tubes surrounding the engine to cool the nozzle and preheat the propellants.

Reaction Motors XLR-99 rocket nozzle

The nozzle is about 43 inches tall.

Reaction Motors XLR-99 rocket nozzle

The nozzle is about 30 inches in diameter.

Reaction Motors XLR-99 rocket nozzle

The nozzle weighs about 200 pounds.

Reaction Motors XLR-99 rocket nozzle

Reaction Motors XLR-99 rocket nozzle

Due to tolerances being out of spec, this particular nozzle was never incorporated into a complete engine.

Reaction Motors XLR-99 rocket engine at AFFTC Museum

This complete XLR-99 engine is displayed at the Air Force Flight Test Center Museum at Edwards Air Force Base.

X-15-1 56-6670 with XLR-99 rocket engine in 1961

The North American X-15-1 56-6670 is prepared for an early XLR-99 flight in 1961. NASA Photo e881302.

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