I noticed that the time from MECO to second engine start is 5 seconds. Iridium-3 was 13 seconds and SES-10 was 11 seconds.The benefits of reduced coast time between stages is obvious, but I'm surprised they have managed to reduce the coast by more than 50% compared to the last SES mission.Note that all numbers are taken from the mission press kits's.
Quote from: EspenU on 10/11/2017 06:26 amI noticed that the time from MECO to second engine start is 5 seconds. Iridium-3 was 13 seconds and SES-10 was 11 seconds.The benefits of reduced coast time between stages is obvious, but I'm surprised they have managed to reduce the coast by more than 50% compared to the last SES mission.Note that all numbers are taken from the mission press kits's.I might be totally wrong on this but i thought that the "long" coasts we have been seeing between MECO and 2nd stage ignition recently is purposely done so that the 1st stage has a chance to begin its flip, so that when the 2nd stage ignites the exhaust plume does less dames to the interstage and all the electronics housed within.
Quote from: wardy89 on 10/11/2017 09:42 amQuote from: EspenU on 10/11/2017 06:26 amI noticed that the time from MECO to second engine start is 5 seconds. Iridium-3 was 13 seconds and SES-10 was 11 seconds.The benefits of reduced coast time between stages is obvious, but I'm surprised they have managed to reduce the coast by more than 50% compared to the last SES mission.Note that all numbers are taken from the mission press kits's.I might be totally wrong on this but i thought that the "long" coasts we have been seeing between MECO and 2nd stage ignition recently is purposely done so that the 1st stage has a chance to begin its flip, so that when the 2nd stage ignites the exhaust plume does less dames to the interstage and all the electronics housed within.I understand the reasoning. However, this flight has an ASDS landing, so it involves a flip.In addition, the last expendable launch (Intelsat 35e) also had an 11 sec coast (again, the time is from the press kit, not from web cast measurements).
LD giving the abort instructions. If urgent, call "HOLD HOLD HOLD" over the net.If non-urgent, brief the LD and a decision whether or not to abort will then be made.
Quote from: ChrisGebhardt on 10/11/2017 09:46 pmLD giving the abort instructions. If urgent, call "HOLD HOLD HOLD" over the net.If non-urgent, brief the LD and a decision whether or not to abort will then be made.Was this just an explanation of the abort procedure or was there an abort called?
[SpaceflightNow] SES-11 CoverageHalliwell said SES did not receive a significant financial discount from SpaceX in switching the SES 11/EchoStar 105 launch to a reused booster, but the agreement did result in an earlier launch date...."We should have launched a year ago, Halliwell said. "We've been waiting for a launch for a long, long time."...Without taking the opportunity to fly on a reused rocket, Halliwell said it's likely the launch of SES 11/EchoStar 105 "would have been somewhat delayed because we would have had to wait for hardware to become available for us."
Some interesting yellow beams added to the T/E