Nasa completed the first successful test of the ullage settling motor this past week. The ullage settling motor is a small solid rocket that does exactly what the name implies. After 1st stage separation, the rest of the vehicle, including the fuel for the 2nd stage motors, is in free fall. Before ignition of the 2nd stage motors, the ullage settling motor fires, giving a comparatively slight acceleration that forces the fuel in the tanks to settle at the bottom and creates a proper ullage space. Pushing the fuel down before main ignition has a major benefit: it prevents fuel vapor from being sucked into the rocket motor. This can cause uneven combustion in the motor and cavitation damage to the turbopump impellers. The first Ares I test flight, called Ares I-X, is scheduled for 2009.
- SpaceX's Falcon 1 finally makes orbit
- China Sets Sights on the Moon
- Asteroid Protection Program
- On Orbit III
- Lunar Reconnaissance Orbiter
- Carnival of Space!
- Ares PDR not as peachy as reported
- NASA clears hurdle on Soyuz
- On Orbit II
- Chinese Claim Em Drive Works
- Why Go to Space Pt V
- Get It from the Source
- On Orbit I
- NASA Eyes Nuclear Power for Moon Base
- Carnival of Space is Live
- Russia May Help Cuba Build Space Centre
- India's Moon Mission May Lift Off October 19
- Solar Power Satellite Proof of Concept
- Michael Griffin Speech
- Russia Looks to Take Lead in Commercial Launch Ser...
- Take the Sarah Palin!!
- NASA Conducts First Test On New Motor For The Ares...
- Carnival of Space
- He can't really be that dumb can he?
- The End of OPEC!
- McCain & Obama's Positions on Space Exploration
- NASA Teams With Lewis Center and Students Worldwid...
- Bush Administration's jihad to Retire the Shuttle
- Statement of Administration Policy
- Armageddon, starring Bruce Willis
- NASA Night Launch
- Why Go to Space Pt IV(a)
- Preparing to Rescue Hubble
- Why Go to Space Pt IV
- ▼ September (35)