The XCOR 5K18 "Lynx" engine is seen running here on the test stand at the Mojave Air and Space Port in Mojave, CA.

Mike Massee photo

5K18 "Lynx" Engine - fueled by Liquid Oxygen and Kerosene

Mike Massee photo

The very first hot fire of the first 5K18 engine (video screenshot)

5K18 engine testing continues through winter and spring in the High Desert.

Mike Massee photo