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| | |-+  Apollo 7 Rendezvous with S-IVB
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Author Topic: Apollo 7 Rendezvous with S-IVB  (Read 6137 times)
Christophe
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« Reply #15 on: May 30, 2007, 07:13:49 AM »

I had a go at getting a more historically accurate rendezvous. See comparison. Not spot on, but about as close as I can get it.  Happy

Congratulation!
You're pretty close to the real.

As far as the SIVB attitude is concerned, do you enable in orbiter the gravity gradient torque?
I ask that because, allthough this feature is more realistic, the problem is that unlike the real SIVB the NASSP one has no attitude hold and it begins to drift slowly as soon as the CSM has separated.
For my own I disable the gravity gradient torque in orbiter simply because of that. Sometime the less realistic is... more realistic.
Would be interested in knowing what people think about that?
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movieman
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« Reply #16 on: May 30, 2007, 08:20:46 AM »

You should be able to switch focus to the SIVB and steer it yourself if you need to change the orientation.
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Swatch
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« Reply #17 on: May 30, 2007, 10:31:59 AM »

I think that means that the S-IVB needs itself an attidude hold-system.  Cool
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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)
Christophe
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« Reply #18 on: May 31, 2007, 05:40:34 AM »

I think that means that the S-IVB needs itself an attidude hold-system.  Cool

May be this could be part of the future SIVB autopilot, TLi and so on?..
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tblaxland
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« Reply #19 on: June 03, 2007, 04:36:31 AM »

As far as the SIVB attitude is concerned, do you enable in orbiter the gravity gradient torque?
I ask that because, allthough this feature is more realistic, the problem is that unlike the real SIVB the NASSP one has no attitude hold and it begins to drift slowly as soon as the CSM has separated.
For my own I disable the gravity gradient torque in orbiter simply because of that. Sometime the less realistic is... more realistic.
Would be interested in knowing what people think about that?

I disable the gravity gradient torque, not only for Project Apollo but also for STS. It certainly makes docking easier when your target is not rotating. You can use the Remote Vessel Control custom function to killrot the S-IVB after separation. If you leave gravity gradient torque enabled, it means you need to do this periodically.

S-IVB auto-pilot sounds like a good idea.
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Swatch
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jasonims
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« Reply #20 on: June 03, 2007, 04:25:48 PM »

for a quick fix, why not just cheat and set orbiter to keep killrot on for the S-IVB?
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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)
Christophe
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« Reply #21 on: June 04, 2007, 02:14:41 PM »

for a quick fix, why not just cheat and set orbiter to keep killrot on for the S-IVB?

Could be a solution... but how to do that?
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mikaelanderlund
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« Reply #22 on: August 14, 2007, 05:50:23 AM »

yes, how to do that Confused

Mikael
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DrLaufbahn
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« Reply #23 on: November 22, 2007, 06:53:58 AM »

By the way, just in case somebody doesn't already know about it, there is a footage of the S-IVB on YouTube:

http://www.youtube.com/watch?v=TnHUoWXTWto
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