[FPSPACE] Soyuz LV question

[James Oberg]

Re: [FPSPACE] Soyuz LV questionAnatoliy, this is significantly different from Sergey's answer.

I never knew for sure, but I had always believed that the
strap-on nose was held in locked position by its own thrust,
and then when that stopped, it slid backwards slightly,
then hinged outwards top first, the bottom held on a hinge
through a certain angle before falling free.

This is a good chance to clear up a lot of misconceptions.

By the way -- it's got to be said:   WELL DONE on
your Fobos-Grunt coverage in IEEE and for BBC and
elsewhere, you were definitely the man on top of -- 
and ahead of -- the story. Molodets!!

Jim


  ----- Original Message ----- 
  From: Anatoly Zak 
  To: Untitled 
  Sent: Saturday, September 26, 2009 9:39 AM
  Subject: Re: [FPSPACE] Soyuz LV question


  Nicolas:

  During a nominal separation, bottom connections of strap-on boosters are severed first, which causes boosters to start rotating around the forward (top) attachments, which are in turn designed to disengage, when a certain angle of rotation is reached.

  Hope it helps,

  Anatoly Zak
  http://www.russianspaceweb.com 


  On 9/26/09 3:38 PM, "Nicolas PILLET" <nikolai39 at hotmail.fr> wrote:


    Dear FPspacers,

    I have a question regarding the Blocks B/V/G/D/ attachment to the central core (Block A).

    Lateral blocks litterally bear the central core. During the ascent, they litterally PUSH the launcher, so if their RD-107 engines shut down, they simply fall down on the pad, like it was the case during Foton-M n°1 launch, in october 2002.

    I am writing an article on the lateral blocks for my website, Kosmonavtika, and you can see the draft here :
    http://www.kosmonavtika.com/lanceurs/soyouz/tech/2/2.html

    My question is : do you know how the separation occur after the completion of the lateral blocks' burn ? Do they NATURALLY fall down, or is there a separation device to ensure they separate exactly at the good time ?

    Other question : how are the lateral blocks linked to the pad's "arms" ? And how are the "arms" separated at the moment of the launch ?

    Thank you very much for sharing information !

    Regards,

    Nicolas



           

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