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Very little of the thousands of hours of Mission Control audio on the website has been heard or documented. As you find moments of interest, post them here for discussion.

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Topics - MadDogBV

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If you're not sure who Dick Kohrs is, check out the Richard H. Kohrs Oral History on the NASA website. He was the Chief of the System Engineering Division and also went on to be an integral part of the Space Shuttle program.

In this phone call, EECOM Sy Liebergot calls Kohrs partially to vent about his inability to get a General Electric contractor to pull some information about hot attitudes - despite promising to have them hand-carried to Sy before the mission - but primarily to have the Systems Engineering division run some data for him since GE "flubbed the dub".

Although you don't hear it on this loop, during the call, FLIGHT Kranz - who apparently was listening in on Sy's loop - hands over control to the AFD and heads over to SPAN to grumble at the CSM engineer, Bill Blair. Bill relays this to Sy later on.

Link: https://apolloinrealtime.org/13/?t=051:30:21&ch=16

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Before handing over to Black FIDO Bill Boone, White FIDO Bill Stoval chats with MIDCOURSE Bob Wiley about pre-perilune aborts to get the Apollo spacecraft home. Although both are fairly sure this is not as practical as a PC+2 DPS abort, they are running maneuvers anyway for comparison purposes.

At the end of the transmission, Bob relays that reinforcements are returning to the SSR to provide support for the trench.

Despite going off shift, Stoval does remain in the MOCR along with Bostick to help Boone and RETRO Weichel with the maneuver planning.

https://apolloinrealtime.org/13/?t=057:10:04&ch=20

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During a rather quiet translunar coast, FIDO Bill Stoval is trying to figure out a way to burp (for the possible contingency of needing to relieve SHe pressure in the LM) the DPS engine in such a manner as to not significantly alter the current (immaculate) trajectory that the Apollo 13 spacecraft is currently on. In doing so, he's feeding DYNAMICS a lot of maneuvers that at this point seem to be bordering on trial-and-error.

MIDCOURSE Quenton Holmes picks up on what's going on and asks Stoval in a rather roundabout manner if they're just "soldiering on the job". Stoval firmly denies this.

https://apolloinrealtime.org/13/?t=051:40:50&ch=20

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General Discussion / Some fun Apollo 13 audio projects
« on: July 20, 2021, 10:16:07 am »
In my spare time I've been working on some audio projects using the Apollo 13 MOCR tapes (thanks to Archive.org and Ben Feist for making this possible). In the process, I've made a neat little audio -- I guess you could call it a clip but it's a little over 12 hours long.  :P

This is MOCR audio from the 047:44:12 to 064:30:27 GET. In this, I've isolated the EECOM audio into the left channel and the FIDO audio into the right channel, so you've got systems in one ear and dynamics in the other. Appropriately, I've named this file "Organized Chaos". You'll see why once you get to the time of the explosion.

In order to make this file listenable, I've run a noise and silence removal algorithm through GoldWave so that it removes most of the silence (except for the loud comm static when they bring the LM online) and provides for a seamless listening experience. This reduces the length of the audio file from 16 hours to 12 hours. There is a slight reverb effect whenever you have overlap in both channels (usually on the Flight Director loop) and the beginning of the audio file during Griffin's shift is a bit de-synchronized. But once you get into Kranz's shift, everything starts to sync up and it sounds a heck of a lot better.

Hope you enjoy this audio file as much as I enjoyed creating it: https://drive.google.com/file/d/1t22SSWM5i3QdjOa-tTOAgtg0-7iat0Ts/view?usp=sharing


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This is a neat little on-the-loop conversation in the midst of all of the mid-course vector and dynamics planning that is taking place on the FIDO loop. RETRO Bobby Spencer asks FIDO Bill Stoval, then GUIDO Will Fenner, if they have a slide rule handy. Surprisingly it seems neither of them have one spare - then again, it is a quiet shift.

Never leave your slide rule at home!

Edit: I think near the end of the conversation, Will Fenner is referring to an "alidade in the back room" though he gets cut off so it's hard to tell.

Link: https://apolloinrealtime.org/13/?t=054:21:56&ch=20

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At least I think it's John Young. He identifies himself as CAPCOM on the loop. Although the CAPCOM on shift is Vance Brand, there would frequently be multiple astronauts congregated around the CAPCOM console during particularly pivotal moments in the flight. Someone who is more familiar with voices on the loops can correct me.

In "Apollo: Race To The Moon" Kranz would identify this as one of the most contentious moments during the flight, where he was pulled in three different directions by Slayton, Kraft and Faget, as far as how to configure the spacecraft and crew immediately after the PC+2 burn. Because Kranz took Faget's route and opted to use a LM PTC procedure which had never been tested, he started taking a lot of heat from the other Apollo senior management and astronauts when the procedure started taking too long for the exhausted crew to implement.

Link: https://apolloinrealtime.org/13/?t=081:02:35&ch=8

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EECOM Sy Liebergot gets a phone call from fellow EECOM John Aaron while working the White Flight shift about three hours before the accident. Sy recounts what he's been dealing with throughout the day, remarking that it's "just like the simulation". This ends up being a pretty helpful summary of what's been going on in his shift.

Link: https://apolloinrealtime.org/13/?t=052:38:46&ch=16

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During transearth coast, LMP Haise asks a question of CAPCOM Kerwin about what to do with bags of waste water, but he asks it in a relatively tactful fashion knowing that the air-to-ground conversations are likely being monitored by the world at large. Flight Director Lunney picks up on this immediately and brings the problem up with FAO.

Dr. Joe Kerwin is not as swift on the uptake.

Link: https://apolloinrealtime.org/13/?t=092:59:29&ch=7

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We all like hearing Lunney get ticked off. During the LM power transfer procedure, SPAN and EECOM posit the idea to FLIGHT of doing a main bus/battery procedure to verify that the main bus is working properly, effectively combining procedures. With little time to spare and last-minute input flooding in to change the procedures, he gets more and more torched.

Link: https://apolloinrealtime.org/13/?t=092:41:52&ch=50

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Hi there! Would there be any benefit to me transcribing the EECOM loops for Apollo 13 - for instance, starting at the beginning of Sy Liebergot's shift just before the accident occurred and then crossing into some of Clint Burton's shift - and then posting it in the "Apollo 13 Moments of Interest" board? I had been transcribing some of the shift and thought it might be of interest to some of the readers/listeners. There's a lot of interesting moments and discussions to be found in some of the flight controller loops, and having the transcript would be helpful in navigating through it. I have no problem putting it together, as I have both the software and equipment to run through it in fairly short order.

I'd attempt to transcribe the FIDO shift also, but as would be expected for anything in flight dynamics, there's a lot more jargon in there and in general it's a bit tougher to follow.

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It has become apparent over the hours following the accident that power will be needed from the LM to the CSM in order to carry out crucial maneuvers for the PC+2 abort. Unfortunately, the procedure for doing this is becoming very lengthy, which FLIGHT Glynn Lunney comments on as TELMU gives his report to him.

Link: https://apolloinrealtime.org/13/?t=065:12:52&ch=50

Lunney later relays this to CAPCOM Joe Kerwin. Kerwin is already a bit skeptical about having the crew do any unnecessary procedures. Earlier, he feuded with EECOM Liebergot about doing extra cryo-stirs. Not surprisingly, he is very audibly frustrated at the lengthening of the LM umbilical procedure.

Link: https://apolloinrealtime.org/13/?t=065:15:56&ch=50

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This is somewhat technical in nature but it does give an interesting glimpse into the day-to-day troubleshooting that EECOM engineers have to do in order to solve open issues. Jim from the back room chats with Sy Liebergot and Charlie Dumis (still on console from the previous shift) about the failure of a capacitance probe and how it might have occurred. Both are particularly impatient, given that it seems to be a re-explanation of details that they already know. Dumis* does give an amusing exclamation near the end of the conversation.

Eventually, Sy just tunes out and moves on to discussing another open issue with FLIGHT - fixing the quantity balance on the H2 tanks.

https://apolloinrealtime.org/13/?t=049:37:46&ch=16

* Edit: After listening to the tape a few times, I'm pretty sure that it's George Conway and not Charlie Dumis who explodes "Bullshit!" at the end of the conversation.

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CAPCOM Jack Lousma asks FLIGHT (Milt Windler) if he has recovery plans. Milt misunderstands at first and thinks that Lousma is joking around, but then as the conversation progresses, he realizes they are referring to the crew on board the spacecraft (since the MPL and AOL has been changing frequently throughout the flight).

Pago Pago, or Hawaii?

Link: https://apolloinrealtime.org/13/?t=084:48:25&ch=8

Edit: Looking back at the clip, it sounds like Milt is laughing at Jack's Freudian slip of referring to him as "fright" instead of "flight", rather than the recovery plans inquiry. Most people in the business would probably agree that if anyone would be referred to as a fright director, it would likely be Kranz or Kraft.

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Apollo 13 Moments of Interest / 056:12:37 RECOVERY gets ready to abort
« on: March 30, 2021, 02:37:41 pm »
Immediately after news of the O2 leak, RETRO is already preparing for the worst and getting abort procedures underway with RECOVERY coordinator Edward Bullock.

Link: https://apolloinrealtime.org/13/?t=056:12:37&ch=32

RECOVERY does later dial up PACIFIC RECOVERY to lay down the law on a potential PC+2 abort and/or T+60 fast abort plan and ensure that the Navy ships are still in recovery range.

Link: https://apolloinrealtime.org/13/?t=056:33:18&ch=32

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Pretty self-explanatory. He's not explicitly identified as Jay, but the voice is unmistakably his. I haven't monitored the FIDO loops to determine if Jay was chatting to the backroom prior to this, though I gather there were multiple FIDO's and GUIDO's working the consoles after the accident occurred. He's not heard from again on the FLIGHT loop until Lunney's second shift at around 089 hours or so.

Link: https://apolloinrealtime.org/13/?t=064:38:54&ch=7

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