Thu, Aug 06, 2015
Agree That Higher Than Expected Vibrations Led To The Loss Of The Spacecraft
The International Launch Services (ILS) Failure Review Oversight Board (FROB) has concluded its work associated with the May 16 Proton launch failure that led to the loss of a Centenario cargo vessel carrying supplies for the ISS.
The ILS concurred with the most probable cause and the associated corrective action plan which were identified by the Russian Interagency Commission (IAC) as a result of the May 16 Proton launch vehicle failure carrying the Centenario spacecraft.
The members of the FROB reviewed the findings and conclusions from the IAC along with results from testing and investigations that the IAC directed to be performed by Khrunichev and their subsidiaries.
Based on the data presented by KhSC, the FROB agreed that the most probable cause of the failure was a result of a higher than expected vibration environment most likely caused by the combination of a marginal mechanical joint used to mount the Stage III steering engine turbo pump and a steering engine turbopump rotor material that had marginal strength under maximum operating environments. This led to a premature shutdown of the turbopump and loss of Stage III control authority and subsequently to the failure of the mission during 3rd stage operation approximately 497 seconds after liftoff.
“The participating customers, insurance underwriters and independent subject matter experts are to be commended for their valuable contributions during the extensive FROB review process. We thank our customers for their support as we prepare for the safe return to flight of ILS Proton,” said ILS Vice President and Chief Technical Officer, John Palmé.
(Proton rocket launch image from file)
More News
Hold Procedure A predetermined maneuver which keeps aircraft within a specified airspace while awaiting further clearance from air traffic control. Also used during ground operatio>[...]
Altitude Readout An aircraft’s altitude, transmitted via the Mode C transponder feature, that is visually displayed in 100-foot increments on a radar scope having readout cap>[...]
Aero Linx: European Hang Gliding and Paragliding Union (EHPU) The general aim of the EHPU is to promote and protect hang gliding and paragliding in Europe. In order to achieve this>[...]
Also: Skydio Chief, Uncle Sam Sues, Dash 7 magniX, OR UAS Accelerator US Secretary of the Air Force Frank Kendall was given a turn around the patch in the 'X-62A Variable In-flight>[...]
"The need for innovation at speed and scale is greater than ever. The X-62A VISTA is a crucial platform in our efforts to develop, test and integrate AI, as well as to establish AI>[...]