Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV

"Jorge R. Frank" <jrfrank@xxxxxxxxxxx> wrote in
news:Xns9687830AAF60Fjrfrank@xxxxxxxxxxxxxx:

> Scott Lowther <scottlowther@xxxxxxxxxxxxxxxxxxxxxx> wrote in
> news:M7Axe.343$j21.231@xxxxxxxxxxxxx:
>
>> Kim Keller wrote:
>>
>>>>It wouldn't entirely surprise me to see the first qualification
>>>>launche of the 5-segment stick booster (no upper stage) by late
>>>>2006, using Pad 39B and the third MLP as infrastructure.
>>>
>>>There's no way the avionics and the TVC system will be ready for test
>>>by then.
>>>
>> Errrrrmmmm... the TVC system is available *now.*
>
> In two axes (pitch and yaw, or more precisely rock and tilt) only. A
> single SRB has no roll control.
>
>

I forgot about the earlier discussion on this topic (might have been in
s.s.shuttle) -- roll control would definitely add to the development
time, but would roll control be absolutely necessary to the initial test
flights to qualify the booster itself?

As a follow-up question -- is "active" roll control needed (i.e., "we're
going to roll the booster 120 degrees after liftoff"), or simply enough
control for "roll prevention"? How much does returning to an
axisymmetric payload simplify the guidance problem -- in particular, we
no longer have to worry about things like wing loading, etc?


--
I was punching a text message into my | Reed Snellenberger
phone yesterday and thought, "they need | GPG KeyID: 5A978843
to make a phone that you can just talk | rsnellenberger
into." Major Thomb | -at-houston.rr.com

.

Relevant Pages

  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... >>I don't know why people are acting like the roll control ... >> pack hung off the side of the booster. ... > certainly not in time for a flight test in late '06. ... consequences of either an errant SRB crashing through LC39 infrastructure, ...
    (sci.space.policy)
  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... > However, that does not change Kim's basic point: without roll control, ... Why do we care if the initial flights of the booster roll? ... It makes a lot more sense to put all of the roll control hardware on the ...
    (sci.space.policy)
  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... launche of the 5-segment stick booster by late ... single SRB has no roll control. ... s.s.shuttle) -- roll control would definitely add to the development time, but would roll control be absolutely necessary to the initial test flights to qualify the booster itself? ...
    (sci.space.policy)
  • Re: Griffin Wants Inline SDLV and 5 Segment SRB/CEV
    ... >I don't know why people are acting like the roll control ... > pack hung off the side of the booster. ... The big deal is having a booster control system developed, ...
    (sci.space.policy)
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