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.


 
 

 

President proclaims Memorial Day as ‘Day of Prayer’

President Barack Obama May 22 saluted the service and sacrifices of America’s military members–past and present–and proclaimed Memorial Day, May 25, 2015, “as a day of prayer for permanent peace, and I designate the hour beginning in each locality at 11 a.m. of that day as a time during which people may unite in prayer....
 
 

Air Force leaders’ Memorial Day message

Secretary of the Air Force Deborah Lee James and Air Force Chief of Staff Gen. Mark A. Welsh III send the following Memorial Day message to the Airmen of the Air Force and their families: To the Airmen of the United States Air Force and their Families: On Memorial Day, Americans pause in solemn remembrance...
 
 

Headlines May 22, 2015

News: Second Marine killed in Hawaii Osprey crash identified - Marine Corps officials have identified the second Marine to die as a result of the May 17 MV-22B Osprey crash as Lance Cpl. Matthew J. Determan of Maricopa, Ariz.   Business: Israel defense exports plunge to seven-year low - Israeli defense sales last year plunged to their...
 

 

News Briefs May 22, 2015

Ukrainian officer hit with third charge in Russia A third charge has been filed against a Ukrainian military officer who has been behind bars in Moscow for nearly a year over the deaths of two Russian journalists in Ukraine. Nadezhda Savchenko, who worked as a spotter for Ukrainian troops fighting separatist rebels in eastern Ukraine,...
 
 
Army photograph by C. Todd Lopez

Smart-mortar will help Soldiers more effectively hit targets

Army photograph by C. Todd Lopez Nick Baldwin and Evan Young, researchers with the Armament Research Development and Engineering Center at Picatinny Arsenal, Pennsylvania, discuss the 120mm Guided Enhanced Fragmentation Mortar ...
 
 

Air Force assigns new chief scientist

The Air Force announced the service’s new chief scientist to serve as a science and technology adviser to the secretary of the Air Force and the chief of staff of the Air Force, May 21. Dr. Greg Zacharias will be the 35th chief scientist and is ready to “dive in” to his new role. “I...
 




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>