#Can't Extract Lunar Module From S-IVB

1 messages · Page 1 of 1 (latest)

clear herald
#

This has happened to me twice in a row where upon docking with the lunar module it kinda glitches into the side of the S-IVB and can't be removed no matter what I do. This screenshot is specifically in Campaign 5 Mission 2, however the same thing happened to me in a free mission.

wise meadow
#

Check your pyros. They need to be on before releasing the LM.

ashen gazelle
#

He might have clipped the LM with the SIVB. I think that is still an issue.

clear herald
#

It is clipping in the screenshot. Also the pyros should have been armed unless the checklists have you turn them off for some reason.

untold hazel
#

I think the checklist does have you turn them off, which is incorrect or misplaced. You should turn them off after LM extract.

clear herald
#

I will go through it again later today and double check if that was the case.

untold hazel
#

According to the manual, I think it says that there are retention springs that release when the switch to separate LM from SIVB. That doesn’t seem to be the case because you still just hover inside the SIVB. Not sure if that’s being looked at or not.

clear herald
#

Ye Just did it again, same thing happened. Pyros were armed the whole time, but I don't think that is the problem. The LM just seems to keep getting clipped into the S-IVB. I even made sure to dock as slowly as possible (0.1dV), and I still couldn't get the LM out.

untold hazel
#

Huh, that’s strange. Never had that problem before. Maybe I’m going too fast?

#

I’ll do one tonight. Just to see if I can duplicate.

#

Are you doing it from a certain mission? Like are you starting from the launch pad, or is it an academy mission, campaign mission?

untold hazel
#

@clear herald

clear herald
#

I've had it happen both with the free mission from launch pad and in the last campaign mission 2. The latter twice in a row, now.

untold hazel
#

Copy that, doing mission 2 now. In the middle of TLI burn.

untold hazel
#

🤷🏼‍♂️

#

Seem to work for me

#

Oh I noticed on the Docking Checklist it doesn’t tell you to go to Retract on the PROBE EXTD/RETR switch. Did you do that before switching the SIVB/LM SEP? If not, that could be why.

#

Man these checklists are a mess.

#

Even when running the checklist it doesn’t have you go to Retract for the probe extend/retract switch.

wise meadow
#

I'm still thinking something to do with pyros. Maybe the ED circuit breakers ? I had this for a while until I was given a set up custom checklsts by someone here. I'll see if I can find them...

clear herald
solemn niche
#

SIVB LM Sep cbs closed?

clear herald
#

I'll have to check later (Making dinner and have a DnD session I'm DMing after), but I was able to do it in the academy mission, so I have a feeling it likely is a cb somewhere that's not mentioned when running the checklist.

solemn niche
#

Yeah those need to be closed of course

#

Check panel 278 for them

wise meadow
#

At this point it's also possibly worth doing a steam file verification and in-game panel reset. Just to be sure. I'm leaning toward some cb as well though.

untold hazel
solemn niche
#

Which one?

untold hazel
#

Probe Extend/Retract switch to retract

#

Docking

#

Or post docking

solemn niche
#

should be on retract before CSM/LV separation

untold hazel
#

That’s what I thought. I doesn’t have it in there.

solemn niche
#

its typically left in RETRACT after the docking probe is extended before TLI

#

and before CSM/LV sep there is a verify step

solemn niche
unborn narwhal
#

I don’t think it even has you extend the probe before TLI

solemn niche
#

Lol very much an oversight then

unborn narwhal
#

You only do it during pre-sep preparations

#

At the verify step you mentioned I presume

clear herald
# solemn niche Check panel 278 for them

Looking at it again, those are closed. Currently doing the TLI burn, I'll try to see if I can figure out what is different here vs the academy mission. Feel like the checklist has to be missing something somewhere when running it.

clear herald
#

It was the SECS logic switches. The Docking checklist has you turn those off after docking latches engage but before SIVB/LM separation.

solemn niche
#

they should be turned back on before ejection

#

is that missing?

clear herald
#

Yeah, the docking checklist shows to turn them off and the post-docking checklist doesn't have you turn them back on for LM extraction.

solemn niche
#

it wouldnt be in post docking

#

it would be in pre LM sep & ejection

#

For instance

clear herald
#

I don't see that checklist. The post docking one does have you flip the SIVB/LM sep switch at the end, so I would assume that one should have you check that the SECS logic and pyro switches are on.

solemn niche
#

Seems to have combined procedures and missed steps as a result, sadly

#

Someone screwed that up

clear herald
#

At least I know what to change now. That was driving me crazy lol.

untold hazel
#

Success. Glad we got it resolved. Sort of.

solemn niche
clear herald
#

Is there links to them somewhere? I'd like to download pdfs of them if I could. Make use of my second screen lol.

solemn niche