Re: Why is the CEV so heavy?


"WvB" <wvb@xxxxxxxx> wrote in message
news:Xns9662CC838F6A0SpaceIDToken@xxxxxxxxxxxxxxxxx
>
> And how are they going to do TVC? Doesn't the current SRB have a fixed
> nozzle?

Absolutely not. The SSME's don't have enough control authority to keep the
stack pointed in the right direction. If you loose nozzle steering on an
SRB, the shuttle is going to be toast.

> Isn't TVC with a solid a rather complicated affair compared to
> a liquid booster?? And if they add TVC to the SRB, isn't it effectively
> a NEW stage? After all, the nozzle is the most critical/vulnerable
> component of a solid motor...

Since it already has a steerable nozzle, the only thing they need is a roll
control system of some sort. That's easier to do than the steerable nozzle
they've already got. You just have to make sure that the roll control
system has enough margin to handle all contingencies, or else the passengers
will be getting dizzy very quickly. :-(

Jeff
--
Remove icky phrase from email address to get a valid address.


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Relevant Pages

  • Re: Why is the CEV so heavy?
    ... WvB wrote: ... Isn't TVC with a solid a rather complicated affair compared to ... And if they add TVC to the SRB, ... the nozzle is the most critical/vulnerable ...
    (sci.space.policy)
  • Re: Why is the CEV so heavy?
    ... Doesn't the current SRB have a fixed ... No, it gimbals. ... Prev by Date: ...
    (sci.space.policy)