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XCOR Aerospace
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Press Release
XCOR Successfully Tests New Engine


XCOR fires the XR-4K5 LOX-Kerosene engine for the first time on March 24th, 2003 at the Mojave Civilian Flight Test Center.
                                                                                                                                     - Photos by Mike Massee

Mojave, CA, Monday, March 31, 2003: Today XCOR Aerospace announced that it has successfully completed multiple test firings of their new LOX/kerosene rocket engine, the XR-4K5. The new engine is considerably more powerful than the previous isopropyl alcohol fueled rocket engine used in the EZ-Rocket. The new engine produces 1,800 pounds of thrust, and runs at two and a half times the chamber pressure of the previous engine.

According to Dan DeLong, XCOR Chief Engineer: “This is XCOR’s first engine designed to run on liquid oxygen and kerosene. The initial tests are in the heat sink configuration, and we expect to develop it further into a regenerative cooled version.” DeLong stated: “The XR-4K5 also uses our most recent electrical igniter design that is smaller and lighter than previous generations.”


The XR-4K5 also uses XCOR's most recent electrical igniter design, smaller and lighter than previous generations.

Jeff Greason, XCOR CEO said: “We are very excited about the new engine since it moves us closer to our goal of a reliable and economical vehicle for space tourism as well as educational and commercial uses. The more powerful engine and use of readily available and nontoxic fuels is a notable development in reliability and cost control of operating suborbital vehicles.

XCOR is developing the XR-4K5 for future applications, including the propulsion system for the Xerus project.”

The Xerus (pronunciation: zEr'us) project is part of a joint marketing agreement between XCOR Aerospace and Space Adventures, Ltd., that provides Space Adventures the first 600 flights to 62 miles (100 km) altitude aboard XCOR’s Xerus sub-orbital vehicle, designed specifically for space tourist flights. According to a recent study by the Futron Corp., a Bethesda, MD aerospace consulting firm, the space travel market could generate revenues of over $1 billion annually by 2021.

XCOR Aerospace is a California corporation located in Mojave, California. The company is in the business of developing and producing safe, reliable and reusable rocket engines and rocket powered vehicles.


XCOR Employees prepare the test stand before the first run of the XR-4K5.

XCOR Aerospace is a California corporation located in Mojave, California. The company is in the business of developing and producing safe, reliable and reusable rocket-powered vehicles and propulsion systems that enable affordable access to space.

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