Space

June 27, 2012

Boeing validates performance of CST vehicle’s attitude control engine

Boeing recently demonstrated the dual-role propulsion features and performance of the Orbital Maneuvering Attitude Control engine on the service module for the company’s Crew Space Transportation-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 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 of an aborted ascent. Because the engine has been modified to accommodate additional burn time for the CST-100 spacecraft, the test team conducted a series of demonstration firings on two development OMAC engines to ensure the integrity of the modification.

The tests used equipment previously used by the space shuttle program to test Orbiter Reaction Control System engines. The test firing of smaller propulsion engines in the near-vacuum environment at White Sands provides a more realistic simulation of on-orbit conditions. The OMAC test series included 20 engine firing sequences of varying numbers of pulses and durations to validate engine and valve performance as well as durability.

Boeing has successfully completed 46 CCDev milestones to date. The team is on schedule to complete remaining CCDev-2 milestones this summer, including service module propellant tank tests and a forward heat-shield jettison test that will provide additional data on important components of the spacecraft design.

Boeing’s CST-100 is a reusable spacecraft that will provide commercial crew transportation services to low Earth orbit, enabling the return of U.S. access to the International Space Station by 2016.




All of this week's top headlines to your email every Friday.


 
 

 

NASA launches new Micro-g NExT for undergraduates

NASA is offering undergraduate students an opportunity to participate in a new microgravity activity called Micro-g Neutral Buoyancy Experiment Design Teams. The deadline for proposals is Jan. 28, 2015. Micro-g NExT challenges students to work in teams to design and build prototypes of spacewalking tools to be used by astronauts for spacewalk training in the...
 
 
launch1

Storm fails to quench liftoff of secret reconnaissance satellite

The fiery launch of an Atlas V (541), among the most powerful of the venerable Atlas family, briefly dispelled the gloom over Californiaís Central Coast on the evening of Dec. 12. A team of personnel from United Launch Allianc...
 
 

Lockheed Martin wins Alaska spaceport bid

ANCHORAGE, Alaska – The state-owned space agency Dec. 12 named Lockheed Martin the winner of a bidding process to reconfigure a launch pad to accommodate larger rockets than what the Kodiak Launch Complex can currently handle. Lockheed Martin beat out three other bidders to reconfigure launch pad one at the Kodiak site, officials with the...
 

 
LM-orion-recover

Orion spacecraft heading home after successful at-sea recovery by U.S. Navy, NASA

Engineers are getting their first look at the Lockheed Martin-built Orion spacecraft following its successful flight test and recovery Dec. 5. With the spacecraft recovered from the Pacific and brought to port in San Diego, tec...
 
 
Northrop Grumman image

Northrop Grumman to supply navigation system for SBIRS GEO-5 satellite

Northrop Grumman image Artist’s rendering of the Space-Based Infrared System’s Geosynchronous Earth Orbit satellite.   WOODLAND HILLS, Calif. –¬†Northrop Grumman has been selected by prime contractor Lock...
 
 
boeing-spacecraft

Boeing CST-100 spacecraft moves another step closer to flight

Boeing and NASA recently completed the Ground Segment Critical Design Review and set the baseline design for the company’s Commercial Crew Transportation System, moving a step closer to the planned early 2017 voyage to th...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>