Space Shuttle Ultra 1.25 Revision B development

[DaveS]

BTW, the tanking problem has been fixed (although I haven't checked the code in yet).

Thanks for fixing it. I got some shots of the actual PC-GOAL display used to monitor the tanking process, if wanted.

 

[Urwumpe]

Thanks for fixing it. I got some shots of the actual PC-GOAL display used to monitor the tanking process, if wanted.

PC-GOAL? Is there something more known about it?

 

[Donamy]

I really don't think 95% of people who download SSU, will even care about tanking procedures, or the like. Maybe we could release a lite version first.

 

[DaveS]

PC-GOAL? Is there something more known about it?

You mean of the display or PC-GOAL in general?

 

[Urwumpe]

You mean of the display or PC-GOAL in general?

Both, I read a lot about GOAL, and looked into making it an orbiter library, but it was a tiny bit old in most aspects.

You mean this one?

http://rtreport.ksc.nasa.gov/techreports/96report/softf/soft03.html

http://www.nasa.gov/pdf/160652main_KSC PCGOAL System Data Integrity Position Paper.pdf

 

[DaveS]

Both, I read a lot about GOAL, and looked into making it an orbiter library, but it was a tiny bit old in most aspects.

These are the two images I have of ET loading PC-GOAL display:

In slow-fill on both LH2 and LOX:

In fast-fill on both LH2 and LOX:

 

[Urwumpe]

I really don't think 95% of people who download SSU, will even care about tanking procedures, or the like. Maybe we could release a lite version first.

I think you are right there, but 95% of the Shuttle behavior that these people care about will be wrong, if we don't have a properly wired ET below the orbiter. At least the instrumentation and actuators do matter, maybe not the exact process of tanking.

---------- Post added at 01:03 AM ---------- Previous post was at 12:49 AM ----------

BTW, they published new material about GOAL, or at least, the new search algorithm at NTRS makes it possible to find it... like a description of the interpreter.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740007777_1974007777.pdf

 

[DaveS]

I think you are right there, but 95% of the Shuttle behavior that these people care about will be wrong, if we don't have a properly wired ET below the orbiter. At least the instrumentation and actuators do matter, maybe not the exact process of tanking.

True. And the critical Low-Level Cut-Off(LLCO) sensors are in the ET and they're always checked out during the countdown. Before being a problem on STS-114, the normal checkout was at T-2 hrs, 25 mins.

Following the July 13 scrub, they decided to test them earlier, during ET loading shortly after they started reading WET.

 

[Donamy]

:zzz:


:j/k:

 

[Urwumpe]

I think this goes now a tiny bit far into the details... we have not even proper inflight failures yet, don't you think it is not a bit too early for preflight failures?

We need the sensors, badly. But during flight, when something happens that should not happen.

 

[Donamy]

I'd be willing to run interference, when people have problems, only fair since alot of the problems will be my mission addons. :facepalm:

 

[DaveS]

I checked in a new and improved VAB texture. It looks much better now!

 

[n72.75]

Well, I'm part of the 5% that would be interested in proper tanking procedures.

 

[DaveS]

If any of you want, I can make a modern day VAB texture.

 

[Interceptor]

I agree with n72.75 I would also like proper tanking procedures,so I guess that makes me part of the 5% also.

 

[Urwumpe]

If any of you want, I can make a modern day VAB texture.

Would be fine. I can sure find a way to select the modern texture from the right date on.

 

[DaveS]

Would be fine. I can sure find a way to select the modern texture from the right date on.

Checked it in. This texture is for the VAB starting with 2009.

---------- Post added 03-09-12 at 12:30 AM ---------- Previous post was 03-08-12 at 08:36 PM ----------

I've wasted a lot of time trying to figure out how to calculate the required roll angle. Now I've got that figured out (I think), and I'm hoping to have working code in a few days.

BTW, the tanking problem has been fixed (although I haven't checked the code in yet).

How is this work coming along?

 

[SiameseCat]

Slowly. I haven't had the time to do much work on SSU for a few days.

 

[DaveS]

Slowly. I haven't had the time to do much work on SSU for a few days.

How is the roll calculation going? Working good? In that case, I think a check in is in order as we have good guidance and nav. Control will be up to the CDR which is a good compromise in my book.

---------- Post added at 10:36 PM ---------- Previous post was at 01:33 AM ----------

Noticed a bug with the flight deck being not rendered when in any of the payload bay/RMS camera views:

 

[DaveS]

Checked in a document that details the design and development of the Ku band Deployed Assembly(DA) and its gimbals. Maybe it will be interesting once we get started on the Ku band system.

---------- Post added 03-12-12 at 01:56 AM ---------- Previous post was 03-11-12 at 09:33 PM ----------

Checked in a document that details the design and development of the Ku band Deployed Assembly(DA) and its gimbals. Maybe it will be interesting once we get started on the Ku band system.

I have started to give the Ku band DA a make-over based on the drawings in that document and various photos.

Donamy: I could need some help creating the gimbal lock structure that sits on top of the beta gimbal as well as the foil that covers the gimbal mount on the DEA.

---------- Post added at 11:05 PM ---------- Previous post was at 01:56 AM ----------

One more showing the DA gimbal lock structure. Took quite a bit of work and research to get this one right. Now only the cabling between the crew module and DEA, the dish and DEA gimbal mount remains.