Ruptured gas duct blamed for Proton failure
Posted: Tue, Apr 22, 2008, 6:29 AM ET (1029 GMT)
A Russian commission has concluded that a ruptured gas duct caused the premature shutdown of the upper stage of a Proton rocket launched last month, International Launch Services announced Monday. Investigators concluded that the duct, which runs from the gas generator to a propellant pump turbine in the Breeze M upper stage, ruptured late in the second burn of the stage on the March 15 launch, causing the engine to shut down prematurely and ultimately stranding the AMC-14 payload in a transfer orbit; the satellite's owner declared the satellite a total loss earlier this month. The duct likely ruptured because of the combined effects of duct wall erosion, high temperatures and prolonged low frequency pressure fluctuation in the duct, according to investigators. The commission identified a number of corrective actions for both that particular failure as well as steps to improve the reliability of the Breeze M main engine. No timetable for making those changes and returning the vehicle to flight were announced.
A Russian commission has concluded that a ruptured gas duct caused the premature shutdown of the upper stage of a Proton rocket launched last month, International Launch Services announced Monday. Investigators concluded that the duct, which runs from the gas generator to a propellant pump turbine in the Breeze M upper stage, ruptured late in the second burn of the stage on the March 15 launch, causing the engine to shut down prematurely and ultimately stranding the AMC-14 payload in a transfer orbit; the satellite's owner declared the satellite a total loss earlier this month. The duct likely ruptured because of the combined effects of duct wall erosion, high temperatures and prolonged low frequency pressure fluctuation in the duct, according to investigators. The commission identified a number of corrective actions for both that particular failure as well as steps to improve the reliability of the Breeze M main engine. No timetable for making those changes and returning the vehicle to flight were announced.
Related Links:
| <<previous article | next article>> |
|
news in brief
|
|
|
|
news links
|
|
Sunday, February 12
Philip Plait on the Wonders of the Universe
The Browser — 7:00 pm ET (0000 GMT) Young girl's curiosity of science leads to becoming first African-American woman in space
US Air Force — 6:58 pm ET (2358 GMT) Cleveland-built testing equipment ready for space
AP — 6:57 pm ET (2357 GMT) Out of this world! Video shows spectacular view of moon and Northern Lights from space
The Daily Mail — 6:56 pm ET (2356 GMT) Final ‘go’ for Vega launch
ESA — 10:27 am ET (1527 GMT) |