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Space Shuttle - Flight

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Re: Space Shuttle - Flight

Postby GinGin » Wed Sep 01, 2021 10:54 am

Some TAL tests with military aircrafts at arrival.

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Re: Space Shuttle - Flight

Postby Vinny002 » Wed Sep 01, 2021 8:10 pm

Once I downloaded the latest FG dev snapshot I put it in the FG directory or there is more work than that? Cheers vincent.
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Re: Space Shuttle - Flight

Postby GinGin » Thu Sep 02, 2021 7:26 pm

Vinny002 wrote in Wed Sep 01, 2021 8:10 pm:Once I downloaded the latest FG dev snapshot I put it in the FG directory


You need to specify the location of the downloaded file there:

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Also, you need to uninstall the stable release.
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Re: Space Shuttle - Flight

Postby wlbragg » Thu Sep 02, 2021 9:43 pm

That last landing showed a bit of soot on the fuselage, did it get a little hot on reentry?

Your pics absolutely amaze me every time I see them!
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Re: Space Shuttle - Flight

Postby eatdirt » Thu Sep 02, 2021 10:04 pm

Guidance might command Bank Angle up to 180° to catch the require drag


Your picture with 90 degrees is amazing!!!

Is this a typo? Is there really a mode in which you can enter head down??? Theoretically that sounds feasible, the AOA would still be there!!
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Re: Space Shuttle - Flight

Postby Thorsten » Fri Sep 03, 2021 5:59 am

I believe so, yes, there's nothing wrong with inverted entry to capture the required drag, it just feels spooky if you're in the seat.
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Re: Space Shuttle - Flight

Postby GinGin » Fri Sep 03, 2021 6:30 am

did it get a little hot on reentry?


Indeed, part of some TAL tests.
Up to the limits :mrgreen:



Is there really a mode in which you can enter head down?


Several things can lead to that.
Pre-Bank procedures for a problem after a Deorbit Burn (engine failure) or a shallow AOA (well detailled in the Handbook)
Manually Pre-Bank the Orbiter at a value depending of the delta Perigee "missed"

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I set up a high energy scenario to test that.
Pre-bank during open looped ( until drag reaches 3 ft/s² ish)

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Then Auto Roll again. As I waited quite a long time to go back to Auto, Orbiter was diving like hell in the atmosphere ( a kind of TAL with huge initial drag)
Guidance then commanded a higher than 90° bank (104°) to fight against the phugoid following the first TAL pullout.

So yes, guidance might command higher than 90° bank in some marginal cases, though the bank commanded is filtered before to be sent to the AP to avoid bank transient.

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Countryside Shuttle
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Re: Space Shuttle - Flight

Postby eatdirt » Fri Sep 03, 2021 2:52 pm

Gorgeous!
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Re: Space Shuttle - Flight

Postby GinGin » Fri Sep 03, 2021 6:47 pm

Clouds stucked in the valley are really a thing.
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Re: Space Shuttle - Flight

Postby GinGin » Thu Sep 30, 2021 5:38 pm

Back into Entry / TAEM scenarios before starting with new Ascent guidance tests.

Night cross wind landing in Istres

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Final Approach in Madrid

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Keflavik snowy day

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Final flare

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Welcomed by misty weather
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Re: Space Shuttle - Flight

Postby GinGin » Sat Jan 22, 2022 5:48 pm

Some old pictures with nice views :)

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Another successful test with the new ascent code based on Power Explicit Guidance algorithm
A quite powerful tool for ascent and aborts (TAL and ATO for now).


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Re: Space Shuttle - Flight

Postby TheEagle » Thu Jan 27, 2022 11:19 pm

eatdirt wrote in Thu Sep 02, 2021 10:04 pm:Is this a typo? Is there really a mode in which you can enter head down??? Theoretically that sounds feasible, the AOA would still be there!!

Wait - am I reading correctly ? There is no heat shield on the upper side of the fuselage I though ! That thing should burn down in a second !
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Re: Space Shuttle - Flight

Postby wkitty42 » Fri Jan 28, 2022 11:00 am

if you come in head down with the nose pointed down, instead of up as in a head up entry, the belly would still protect the craft until such time as it could adjust its orientation in the heavier atmosphere after the plasma phase has ended...
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: Space Shuttle - Flight

Postby TheEagle » Fri Jan 28, 2022 11:35 am

Ah ok, I got this wrong then - I though the Shuttle would have it's nose still upwards, but with a 180 roll attitude !
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Re: Space Shuttle - Flight

Postby GinGin » Fri Jan 28, 2022 12:22 pm

Ready for a night Launch
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Into the bucket, one stage only ( from 104% to 72% in one step)
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MECO on time and on speed for another Sucessfull Power explicit guidance with a standard insertion with a 80Nm by 10Nm forecasted.
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Propellant dump
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OMS1 targeted automatically loaded, and written in the very efficient Thorsten Notepad
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