Rocket Engines
Our rocket engines are built to customer specifications.  Below is a selection of engines that illustrate some of our capabilities.  Click on any engine class to learn more. (listed by order of thrust)

• XR-2P1 15 lbf N2O-Ethane
  R&D and educational, variable propellants and third fluid injections
   
• XR-3E17 56 lbf N2O-Ethane
  Stationkeeping - storable
   
• XR-3B4 50 lbf N2O-Isopropyl
  Stationkeeping - storable
  
  
• XR-3M9 50 lbf LOX-Methane
  Stationkeeping - storable
   
• XR-4A3 400 lbf LOX-Alcohol
  Auxilliary or primary propulsion
   
• XR-4K14 1,500 lbf LOX-Kerosene
  Primary propulsion, 'Rocket Racer' engine
   
• XR-4K5 1,800 lbf LOX-Kerosene
  Primary propulsion
   
• XR-5K18 2,700 lbf LOX-Kerosene
  Primary propulsion, Lynx
   
• XR-5M15 7,500 lbf LOX-Methane
  Primary propulsion, space storable

XR-3E17, 56lbf N2O/Ethane Engine

XCOR Aerospace has designed, built, and tested a new 56 lbf rocket engine. The engine, designated XR-3E17, is a direct descendent of the company’s XR-2P1 “Tea Cart” engine developed in 2000. Although it weighs just half as much as its predecessor, the new engine has nearly four times the thrust of the 15 lbf original. This regeneratively cooled engine, developed using private investor funding, is made of copper with a lightweight aluminum cooling jacket.

	The 3E17 being tested at XCOR's facilities in Mojave, CA

This spark-ignited engine is capable of an unlimited number of starts and restarts. It is fueled by a self-pressurizing propellant mixture of ethane and nitrous oxide.

The XR-3E17 engine has a number of commercial and military applications including use as reaction control system.