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40th anniversary of first US manned craft re-use.

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  40th anniversary of first US manned craft re-use. Snidely <snidely.too@gmail.com> - 2021-11-17 17:58 -0800
    Re: 40th anniversary of first US manned craft re-use. JF Mezei <jfmezei.spamnot@vaxination.ca> - 2021-11-17 23:25 -0500
      Re: 40th anniversary of first US manned craft re-use. Snidely <snidely.too@gmail.com> - 2021-11-22 15:29 -0800

#9536 — 40th anniversary of first US manned craft re-use.

Well, 5 days ago.   STS-2.  NasaSpaceFlight.com has a retrospective:

<URL:https://www.nasaspaceflight.com/2021/11/sts-2-40th-anniversary/>

Turn-around was about 5 months, it seems, but another month was added 
for tile repairs after RCS hypergolics were spilled.  An abort spoiled 
the Nov 4 date, and the Nov 12 date was also in issue due to mux/demux 
failure.

Launch was 7 months after the STS-1 launch.  The flight lasted 2 days 
instead of the planned 5, due to a fuel cell failure.  This was also 
the first flight where SRB joint o-ring erosion was found.


(For JFM, there's a picture of /Columbia/ descending to Edwards.  The 
angle is chosen to give the most appropriate airspeed; I'm not sure 
what the sink rate for level flight would be if you started trying it 
at the speed and elevation pictured.)

/dps

-- 
"What do you think of my cart, Miss Morland? A neat one, is not it? 
Well hung: curricle-hung in fact. Come sit by me and we'll test the 
springs."
(Speculative fiction by H.Lacedaemonian.)

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#9537

On 2021-11-17 20:58, Snidely wrote:

> (For JFM, there's a picture of /Columbia/ descending to Edwards.  The 
> angle is chosen to give the most appropriate airspeed; 


Would it be fair to state that the descent rate wouldn't be that
different, but by gaining speed, shen they do the final flare up, the
wings get the descent rate top drop to near 0 for a smooth landing ?

With low airspeed, they wouldn't be able to droop the descent rate by
much when they flare up, right ?

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#9538

JF Mezei is guilty of <bBklJ.68377$Wkjc.23879@fx35.iad> as of 
11/17/2021 8:25:43 PM
> On 2021-11-17 20:58, Snidely wrote:
>
>> (For JFM, there's a picture of /Columbia/ descending to Edwards.  The 
>> angle is chosen to give the most appropriate airspeed; 
>
>
> Would it be fair to state that the descent rate wouldn't be that
> different, but by gaining speed, shen they do the final flare up, the
> wings get the descent rate top drop to near 0 for a smooth landing ?
>
> With low airspeed, they wouldn't be able to droop the descent rate by
> much when they flare up, right ?

I'm only an armchair pilot.  I would be willing to guess that the CDRs 
and PLTs have tried this in the simulator, just because, and the crews 
on the later flights had very much improved simulators.

I am willing to guess that trying for level flight is not useful in a 
Shuttle.

/dps

-- 
There's nothing inherently wrong with Big Data. What matters, as it 
does for Arnold Lund in California or Richard Rothman in Baltimore, are 
the questions -- old and new, good and bad -- this newest tool lets us 
ask.  (R. Lerhman, CSMonitor.com)

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