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Project Apollo - NASSP 6.4.3 released!
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Author Topic: Apollo 7 vAGC  (Read 1783 times)
Gunner_CAF
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« Reply #30 on: November 03, 2009, 07:30:18 PM »

This save was just after the de-orbit burn (DSKY Flashing V16 N40) and before I used translational thrust to zero the dV/Range indicator.

Thanks,

Gunner

* (Current state) 0002.scn (85.4 KB - downloaded 8 times.)
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Tschachim
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« Reply #31 on: November 09, 2009, 05:56:59 AM »

I checked that and it looks like this is different in different Colossus versions. While for example the "A15 Delco" document states V16 N63 is shown (which means "monitor values", i.e. there should be a countdown), the GSOP (Guidance Systems Operations Plan) for Colossus 249 (used here) states V06 N63 is shown, which is what happens actually and which means no countdown. Or in other words it looks like the document you're using does not match the Colossus 249 version used for Apollo 7.

Cheers
Tschachim
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Gunner_CAF
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« Reply #32 on: November 11, 2009, 09:58:54 AM »

Interesting, thanks for looking at it!  So the time displayed in line 3 and the current time should be noted so you can calculate the time until .05G.  Thanks!

I am working my way back to the de-orbit again so I can do this one more time.  My next quick save was before burn 7 so it's taking me a while to get to the de-orbit.  It seems like some quick saves overwrite.  Oh well, this is fun Happy

Gunner
« Last Edit: November 11, 2009, 11:58:51 AM by Tschachim » Logged
Gunner_CAF
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« Reply #33 on: November 24, 2009, 02:01:24 AM »

Splashdown, in the Atlantic even!  I had some problems working program 37 to get LON to -06415.  After thinking about what this all means, I got it to work. The splashdown went smooth and I ended up at LON -57.62.

Just a few minor things in the deorbit tab FYI.  There needs to be a PRO when you start V37E 37E after you enter the GET of burn ( right after V25E +00259E ...).  At the end in the blue notes, you record Line 2 and Line 3 from the DSKY for the LAT and LON of the splashdown (Not line 1 and 2).

Very fun, thanks to the makers!

Gunner
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Swatch
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jasonims
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« Reply #34 on: November 24, 2009, 08:52:14 PM »

Gunner.... Thank you so much for getting to teh deorbit testing!   Excited!

I've been waiting for somebody to get to this point.  I'm going to use your scenario to see if I can debug the EMS... I don't think its acting quite right...

I'd love to hear your comment on it if you've had a chance to look.
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My Project Apollo Work:
CM Visual
 -VC (~75% complete: texture work beginning again; mesh-78%; texture-70%)
Propulsion Particle Improvements (Focused on S1B right now, BETA 1.0 has been commited)
New Docking Method (~50% complete: research complete; coding partially completed, testing not underway)

Future Work:  (if it's here, it's deemed unnecessary to upcoming release)

Older Work:  (if it's here, it's fair game to whoever wants to improve)
EMS Implementation (committed: minor flaws, but groundwork is there, needs extensive testing)
EMS scrolls (committed: not refined, but usable)
SM Visual (committed: mesh-finished, texture-60%; possibly revisited in future)
J2 Texture (commited: room for improvement)
LRV (committed: mesh-finished, texture-90%; in future a ground up rebuild may be in order, but not on my plans)
Gunner_CAF
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« Reply #35 on: November 26, 2009, 01:02:28 AM »

I have not read up on how the EMS works at entry.  I basically understand it, but I was not sure exactly what the tape was telling me.  I wish there was a way to roll the tape back so I could look at what it recorded.  I know it records G and Velocity, and the line recorded seemed to match the G readings on entry.  Attached is a better point at entry.  This is my last save.  This save is at the Entry Phase on the Deorbit tab of the checklist.

Here is some info from my log:

GET of Ignition (DSKY): 260:23:21
time from ignition to entry interface (DSKY): 0:38:34
GET of Entry Interface: 261:01:55
Predicted spashdown LAT (DSKY): 28.36 deg
Predicted spashdown LON (DSKY): -58.42 deg
Estimated Maximum G's (DSKY): 1.7 G's  - I read as high as 6 G's
Inertial Velocity at Entry Interface (DSKY): 25761 ft/sec
Entry Angle (DSKY): -2.06

If you need any more info, please let me know.

Gunner

* Entry Phase.scn (82.62 KB - downloaded 6 times.)
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Gunner_CAF
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« Reply #36 on: November 26, 2009, 01:27:01 AM »

Attached is my Flightplan with flightdata.  I added some comments in the deorbit tab.

Gunner

* Apollo 7 Flightplan vAGC.xls (369 KB - downloaded 12 times.)
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Gunner_CAF
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« Reply #37 on: November 26, 2009, 09:34:18 PM »

I did the entry again.  This time I scrolled the EMS tape to the "inertial velocity at .05G's in ft/s" displayed on the DSKY.  This was 25870, so I set it to ~25.87.  This time when the .05G light came on, the tape started to scroll.  This checked with the DSKY readout of the actual range and velocity.  I then paused and recorded the values on the G meter so I could make a plot.  A rough plot is attached.

I did read the info in the wiki, and the PDF files referenced.  I still don't fully understand it well enough to attempt a manual entry.  I am not sure the lights on the roll attitude indicator were working, I will have to look at this closer next time.

Gunner


* EMS Plot.jpg (132.68 KB, 764x402 - viewed 26 times.)
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Gunner_CAF
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« Reply #38 on: November 27, 2009, 12:33:31 AM »

I think I got it now, the lights on the roll indicator work, it comes on about 10 secs after the .05G light.  Entering from orbit, this is not so important.  The corrections made are mostly for down range, and cross range corrections at this point.  Neat stuff!

Gunner
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Swatch
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jasonims
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« Reply #39 on: November 27, 2009, 12:47:31 AM »

Allow me to pick my jaw off the floor.   Very Happy

First off... great job...

Secondly... thank you kindly for testing this!

Thirdly, I see I have to fix some stuff (as I suspected) in the EMS.

Fourthly, from what I gathered, a manual reentry is not exactly easy, but for right now what you're doing is perfect for testing it.

PS:  I'll see if I can set up some way for it to print out the track so you don't have to do the pause-record thing.
« Last Edit: November 27, 2009, 12:50:22 AM by Swatch » Logged

My Project Apollo Work:
CM Visual
 -VC (~75% complete: texture work beginning again; mesh-78%; texture-70%)
Propulsion Particle Improvements (Focused on S1B right now, BETA 1.0 has been commited)
New Docking Method (~50% complete: research complete; coding partially completed, testing not underway)

Future Work:  (if it's here, it's deemed unnecessary to upcoming release)

Older Work:  (if it's here, it's fair game to whoever wants to improve)
EMS Implementation (committed: minor flaws, but groundwork is there, needs extensive testing)
EMS scrolls (committed: not refined, but usable)
SM Visual (committed: mesh-finished, texture-60%; possibly revisited in future)
J2 Texture (commited: room for improvement)
LRV (committed: mesh-finished, texture-90%; in future a ground up rebuild may be in order, but not on my plans)
Gunner_CAF
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« Reply #40 on: November 28, 2009, 09:43:49 PM »

Thanks!

Gunner
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