Quote from: northenarc on 09/05/2017 09:53 pm Wow, first ever abort for Ariane isn't it?No. To my knowledge, there's been two others: one in December 2002, which included the first failed Ariane 5ECA; and one in March 2011, which included a previous Intelsat satellite.
Wow, first ever abort for Ariane isn't it?
From Memory: minimum 5 day recycle is required for reconnecting the separated umbilicals alone.Day 1 vehicle safing, De-arming/servicing prior to rollback.Day 2 Table disconnect from pad, Rollback, connect table in BAFDay 3 Umbilicals reconnectDay 4 Table disconnect from BF, Rollout, connect table in PadDay 5 Launch day
Engine start did not look typical to me. Subjectively, seemed subdued and not stable.
I watched from ~T-4:00. My impression is the following:Umbilical retraction was late @ T-0:05 instead of T-0:07.As consequence, the Vulcain 2 engine started late and wasn't running stable at the check-point before the solid are ignited. (@T+0:07 if I'm not mistaken.)They have to roll the launch table back to BAF to reconnect the umbilical arms and connectors.And to replace igniters on the Vulcain2 engine.
Quote from: Rik ISS-fan on 09/05/2017 10:05 pmI watched from ~T-4:00. My impression is the following:Umbilical retraction was late @ T-0:05 instead of T-0:07.As consequence, the Vulcain 2 engine started late and wasn't running stable at the check-point before the solid are ignited. (@T+0:07 if I'm not mistaken.)They have to roll the launch table back to BAF to reconnect the umbilical arms and connectors.And to replace igniters on the Vulcain2 engine.From my point of view, Vulcain 2 was up and running at H0+5,5 s - as it should.The nominal ignition sequence only starts at H0+1 s (in contrast to Vulcain 1 at H0) and chamber ignition itself only happens at around H0+2 s.
From Memory: minimum 5 day recycle is required for reconnecting the separated umbilicals alone.Day 1 vehicle safing, De-arming/servicing prior to rollback.Day 2 Table disconnect from pad, Rollback, connect table in BAFDay 3 Umbilicals reconnectDay 4 Table disconnect from BAF, Rollout, connect table in PadDay 5 Launch day
Quote from: russianhalo117 on 09/05/2017 10:07 pmFrom Memory: minimum 5 day recycle is required for reconnecting the separated umbilicals alone.Day 1 vehicle safing, De-arming/servicing prior to rollback.Day 2 Table disconnect from pad, Rollback, connect table in BAFDay 3 Umbilicals reconnectDay 4 Table disconnect from BAF, Rollout, connect table in PadDay 5 Launch dayI've never understood why they disconnect the umbilicals before launch commit. It has always seemed very optimistic.