[FPSPACE] Soyuz LV question

[Anatoly Zak]

Jim, it is the same answer, just in different words. But obviously, the
opening of the pressurization valve  would not lead to physical separation
of the booster, but just give it some downward thrust. It is the rotation of
the booster around horizontal axis at the top connection point, what really
leads them to physical disengagement from the core stage.

Anatoly Zak
http://www.russianspaceweb.com


On 9/26/09 5:36 PM, "James Oberg" <jeoberg at comcast.net> wrote:

> Anatoliy, 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 <mailto:agzak at optonline.net>
>>  
>> To: Untitled <mailto:fpspace at friends-partners.org>
>>  
>> 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
>>> 
>>> 
>>> 
>>>        
>>>  
>>> 
>>>  Votre correspondant a choisi Hotmail et profite d'un stockage quasiment
>>> illimité.  Créez un compte Hotmail gratuitement !
>>> <http://www.windowslive.fr/hotmail/default.asp>
>>>  
>>> 
>>>  _______________________________________________
>>> FPSPACE  mailing list
>>> FPSPACE at friends-partners.org
>>> http://www.friends-partners.org/mailman/listinfo/fpspace
>>>  
>>> 
>>>  
>>> 
>>>  
>>> 
>>> _______________________________________________
>>> FPSPACE mailing  list
>>> FPSPACE at friends-partners.org
>>> http://www.friends-partners.org/mailman/listinfo/fpspace
>>> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.friends-partners.org/pipermail/fpspace/attachments/20090926/b393d16d/attachment.html