Apparently technical problem in the BAF, no taxiing today, launch postponed.
It has come to light that there is a risk to the redundancy of a critical function on the Ariane 5. Consistent with safety requirements, Arianespace has decided to postpone the roll-out of the #VA261 launch vehicle.Analyses are underway to determine a new launch date.
The launcher and its satellites, Heinrich-Hertz-Satellit and SYRACUSE 4B, are in the final assembly building in stable and safe conditions.
In a vert short (< 5 mins) briefing, Arianespace said they postponed the launch because of concerns about three pyrotechnical transmission lines after similar ones failed in tests. The suspect lines will be replaced. No new launch date, but an update planned for late June.
SFN's manifest says it has been delayed well into July. I guess new pyrotechnic testing would take a few weeks so this sounds reasonable.
Quote from: Galactic Penguin SST on 06/17/2023 06:42 pmSFN's manifest says it has been delayed well into July. I guess new pyrotechnic testing would take a few weeks so this sounds reasonable.Anyone know where the problematic pyrotechnic transmission lines is located? Within the Ariane 5 or the pad infrastructure?
From https://spacenews.com/technical-problem-postpones-final-ariane-5-launch/- June 9: Arianespace receives information of a “nonconformance” in pyrotechnical transmission lines used on Ariane 5- happened while acceptance testing for another program- x-ray of those lines raised doubts- one used in seperation system- two used in "distance system" (that would be the small solid motors on the solid boosters I guess)- Tests done on 4 lines on 14th/15th June- not all tests were successfulAnd now CNES/ESA/Arianespace publish the press call online!At least it seems to have been a public call:https://newsroom.arianespace.com/flight-va261-postponement-of-the-launch/Next time I know better.
Quote from: Zed_Noir on 06/18/2023 01:33 pmQuote from: Galactic Penguin SST on 06/17/2023 06:42 pmSFN's manifest says it has been delayed well into July. I guess new pyrotechnic testing would take a few weeks so this sounds reasonable.Anyone know where the problematic pyrotechnic transmission lines is located? Within the Ariane 5 or the pad infrastructure?Think of them as linear shaped pyro charges:
Muddle translation. Said transmission lines is really one use detonation cords.So within the rocket. So the last Ariane 5 launch might get push beyond Q3 2023, since replacing the transmission lines (detonation cords) will likely be complicated.
Page 6 shows some transmissions lines. So something like an explosive chord but it doesn't disseminate energy outwards. Looks like these one: https://www.dassault-aviation.com/en/space/pyrotechnics-catalogue/transmission-lines/
The new targeted launch date for Heinrich-Hertz-Satellit and SYRACUSE 4B is July 4.Following the replacement of the three pyrotechnical transmission lines identified as doubtful on the Ariane 5 launcher as well as a comprehensive review of all pyrotechnical lines, Arianespace decided to resume the launch campaign for VA261.Initially scheduled for June 16, the new targeted launch date for VA261 is July 4, 2023, as soon as possible within the following launch window:Between 05:30 p.m. and 07:05 p.m. Washington, D.C. time,Between 06:30 p.m. and 08:05 p.m. Kourou time,Between 09:30 p.m. and 11:05 p.m. Universal time (UTC),Between 11:30 p.m. and 01:05 a.m., July 5, Paris time,Between 06:30 a.m. and 08:05 a.m., July 5, Tokyo time.The Ariane 5 launch vehicle and its passengers Heinrich-Hertz-Satellit and SYRACUSE 4B are in stable and safe conditions.
✨ Before the big finish, our diva is finally ready for the opening of the curtain. One last time let’s give it up for Ariane 5’s rooooollll ouuuut! 🚙🚀@esa @arianespace @CNES @EuropeSpacePort #Va261 #OneLastAriane5 #ArianeGroup #Ariane5©️ArianeGroup
Covering the upcoming launches this week:nasaspaceflight.com/2023/07/launch… - by Justin Davenport (@Bubbinski)