Delta 4 launch encountered upper-stage engine issue
Posted: Sun, Oct 7, 2012, 10:20 AM ET (1420 GMT)
United Launch Alliance (ULA) confirmed late Friday that there was a problem with the upper-stage engine during Thursday's launch of a GPS satellite on a Delta 4 rocket. According to ULA, launch controllers noticed an "unexpected data signature" in the performance of the RL10 engine that powers the Delta's upper stage. The unidentified problem caused reduced thrust levels from the engine, but the upper stage was still able to release its payload, the GPS 2F-3 satellite, into the proper orbit because of design margins and propellant reserves. ULA and the engine's manufacturer, Pratt & Whitney Rocketdyne, have created a team to investigate the anomaly. It's not clear yet if the issue will delay the launch in late October of an Atlas 5, which uses a different variant of the RL10 in its upper stage.
United Launch Alliance (ULA) confirmed late Friday that there was a problem with the upper-stage engine during Thursday's launch of a GPS satellite on a Delta 4 rocket. According to ULA, launch controllers noticed an "unexpected data signature" in the performance of the RL10 engine that powers the Delta's upper stage. The unidentified problem caused reduced thrust levels from the engine, but the upper stage was still able to release its payload, the GPS 2F-3 satellite, into the proper orbit because of design margins and propellant reserves. ULA and the engine's manufacturer, Pratt & Whitney Rocketdyne, have created a team to investigate the anomaly. It's not clear yet if the issue will delay the launch in late October of an Atlas 5, which uses a different variant of the RL10 in its upper stage.| <<previous article | next article>> |
|
news in brief
|
|
FAA restricts hours for commercial launches during shutdown
Posted: Sun, Nov 9 9:05 AM ET (1405 GMT) China postpones Shenzhou-20 return on orbital debris concerns
Posted: Sun, Nov 9 8:58 AM ET (1358 GMT) |
|
news links
|
|
Thursday, November 13
Firefly Aerospace identifies cause of Alpha test anomaly
NasaSpaceFlight.com — 4:12 am ET (0912 GMT) Firefly Plans Alpha Pad Return For Lockheed Martin Demo By Early 2026
Aviation Week — 4:12 am ET (0912 GMT) Alpha launch expectations lift Firefly despite Q3 losses
Austin (TX) American-Statesman — 4:11 am ET (0911 GMT) The Bright Side: Scientists witness supernova's early stages for the first time
France 24 — 4:09 am ET (0909 GMT) France steps into the space race
Defence24 — 4:06 am ET (0906 GMT) |
