A statement from Boeing about the recent tests of the thrusters for the CST-100 spacecraft:
Boeing Validates Performance of Crew Space Transportation Vehicle’s Attitude Control Engine: Dual-role propulsion system increases flexibility, reliability
HOUSTON, June 27, 2012 -- Boeing [NYSE: BA] recently demonstrated the dual-role propulsion features and performance of the Orbital Maneuvering Attitude Control (OMAC) engine on the service module for the company's Crew Space Transportation (CST)-100 spacecraft. The tests were conducted at NASA's White Sands Test Facility, N.M., as part of the second phase of NASA's Commercial Crew Development (CCDev) program.
"Boeing's unique service-module propulsion system combines on-orbit propulsion with ascent abort capability into a single system, allowing the OMAC engine and the majority of the propellant feed and pressurization hardware to perform dual roles," said John Mulholland, vice president and program manager, Commercial Programs. "This dual-role feature reduces the number of parts and provides operational flexibility, increasing system reliability and improving crew safety."
The OMAC engine is a heritage hypergolic propellant engine produced by Pratt & Whitney Rocketdyne. The engine provides thrust for orbital maneuvers and de-orbit burns, giving the crew precise control of the spacecraft. It also performs critical attitude control and steering functions in the event ...