Christophe BARDOU

CNES Engineer (1981-1985)
ARIANESPACE Engineer (1985-2019)

[Christophe BARDOU @ChristopheBARD6]

@vguillermard @Arianespace @Amazonleo Pas 4 fois + ....mais 4 de + (passage de 32 à 36 satellites)!!!!

[Christophe BARDOU @ChristopheBARD6]

@MummyT1155533 @planet4589 @elonmusk Say that to SpaceCom (AMOS 6).....

[Christophe BARDOU @ChristopheBARD6]

@FYLegal @JLMelenchon De même les systèmes d'adaptation de la charge utile - adaptateurs et dispensers - étaient européens

[Christophe BARDOU @ChristopheBARD6]

@FYLegal @JLMelenchon ". Mais toujours à 100 % russe côté matériel". Encore inexact: Le Kit Sauvegarde Européen - qui permettait d'envoyer un ordre de "destruction" Lanceur en cas de déviation dangereuse de la trajectoire - était un système européen et non russe.

[Christophe BARDOU @ChristopheBARD6]

@FYLegal @JLMelenchon Faux! Les OneWeb étaient lancés par Arianespace avec des lanceurs achetés par Arianespace à Roscosmos. Le contrat de lancement pour OneWeb était entre OneWeb et Arianespace. Quand Arianespace lançait AR4 ou AR5 on ne disait pas que c'était des lancements Aerospatiale!

[Christophe BARDOU @ChristopheBARD6]

@PappalardoJoe As far as I know the only Echostar launch performed by AE was in 1996 (Echostar 2 which was due to launch on a Long March rocket right after the Intelsat 708 disaster..). So that was long before the SpaceX era.....

[Christophe BARDOU @ChristopheBARD6]

@DutchSatellites @Ian_Benecken Obviously all these buildings/restaurant had been evecuated before launch being so close to the pad. Flight Safety ie protection of population is a very, very serious matter at CSG

[Christophe BARDOU @ChristopheBARD6]

@DutchSatellites @Ian_Benecken True but with a VERY notable caveat : the buildings you are talking about for Ariane where located on the launch range (within one kilometer or so from the Ariane 3 or Ariane 4 launch pads) and the restaurant in question was the Orchidée cafeteria used by the operators.

[Christophe BARDOU @ChristopheBARD6]

@FBuffenoir @Arianespace Elles étaient placées dans le cone avant du propulseur d'appoint et étaient récupérées au sol après le vol (les propulseurs retombaient dans la savane à 1-2 km du pas de tir)

[Christophe BARDOU @ChristopheBARD6]

@NM_Physics @ESA_History @EsaTelecoms @esa_sts @Arianespace @ArianeGroup @CNES @Avanti_plc True ...and yet Artemis exceeded its design lifetime as it was retired from service in 2017!

[Christophe BARDOU @ChristopheBARD6]

@Henry_St1tt @chloem_private @BlueOriginGuy @Arianespace @ArianeGroup Actually the Soyuz LV does have an autonomous kind of FTS. It is called AVD. In case non nominal propulsion parameters are detected an automatic shutdown of the engine(s) is commanded, thus ending the mission.

[Christophe BARDOU @ChristopheBARD6]

@DutchSpace I have this one for Flight 20

[Christophe BARDOU @ChristopheBARD6]

@alistairfunge For Ariane this is the first time 3 satellites are launched together in GTO and are bound to GEO. There has been several launches to GTO (V64/V135/V162/V187) with three or more S/C but some of the s/c remained (on purpose) in GTO or went to a translunar orbit (SMART-1 on V162)

[Christophe BARDOU @ChristopheBARD6]

@Litsas @Arianespace You just do not lift off with only one out of two sensors operating. Otherwise this is not redundancy which is there for the reliability in flight (meaning one sensor may fail in flight without affecting the mission).

[Christophe BARDOU @ChristopheBARD6]

@KerbalNut @DutchSpace @NASASpaceflight Each Soyuz flight engine undergoes a 60-second long hot firing test. It is then 'refurbished' and prepared for the flight configuration.

[Christophe BARDOU @ChristopheBARD6]

@DutchSpace @_starbase_ and keeping in mind that the ESCA Plus mission is normally 30 seconds longer than the SCA 'Old' mission it seems that VA249 was ESCA +, VA250 ESCA 'old', VA251 ESCA 'Old' and VA252 ESCA +...so my files are probably wrong...

[Christophe BARDOU @ChristopheBARD6]

@DutchSpace @_starbase_ As we say in French : Wild Card! The Arianespace press kit should be correct (but can also be wrong!). My files say that VA249 was the first ESCA Plus with VA250 the last ESCA 'old design'....but looking at the flight sequence for the various mission

[Christophe BARDOU @ChristopheBARD6]

@_starbase_ @DutchSpace It brings mass reduction by simplification of the nb of interfaces. And there is a new inner membrane.
As a consequence the volume for the spacecraft in the lower berth is increased as the new cone is lower than the previous assembly

[Christophe BARDOU @ChristopheBARD6]

@_starbase_ @DutchSpace VA243 introduces yet another modification: the VEB (Vehicle Equipment Bay) variant H. It consists in an extension of the VEB inner cone to the payload adaptors aft ring. There is also a change of the carbon fiber material.