ULA, XCOR to Develop Upper-Stage Engine

By Frank Morring, Jr. morring@aviationweek.com .
WASHINGTON .

United Launch Alliance (ULA) and XCOR Aerospace are planning a joint effort to develop a low-cost upper-stage engine in the same class as the venerable RL-10, using technology XCOR is developing for its planned Lynx suborbital spaceplane.

The two companies have been testing actively cooled aluminum nozzles XCOR is developing for its liquid ...

---