Spacelog Apollo 13

It's going to take you about 15 hours.

Jack, about how many amperes of LM power will this 15 hours …?

Stand by. We'll get it for you —

How many, Jack?

Okay. He got it. He got the question.

Okay, Jack. That's going to take 120 amp-hours out of the LM, which is equivalent to 10 hours, which will put us back to 193 hours, and that's plenty.

Okay. Let me relay that to Jim here. It'll be 120 amp hours, which leaves us—which puts us back from 203 hours … to 193 hours.

Yes, there's that much to spare.

Okay, Jack. One question here. If we have any problems setting up this LM power to the CSM, is the quickest way to get out of it, return to the normal configuration, as it is for me to just switch the LM POWER to CSM to RESET then OFF?

Stand by 1.

I would like to give one quick step in case that gave Jim report some sort of problem for us to get out of it quickly.

Okay. Let us talk it over for a minute, Jack.

Okay, Jack. Are you with me?

Yes. We're still here, Jack. What we want to do is follow you through on this, so we're going to get high bit rate to do it. In answer to your question, to undo this procedure quickly, in the event a problem develops, be sure that you don't touch the 124 POWER switch because it's got a RESET position. But the way to undo it is go into the CSM and on panel 5 open two circuit breakers. And they're some of the first ones we read to you. Open LM POWER-1 MAIN B, and open LM POWER-2 MAIN B. You copy that?

Okay. Understand. If I want to get out of this real quickly, I have to open just two circuit breakers in the CSM; that's on panel 5, LM POWER-1 MAIN B, LM POWER-2 MAIN B.

Okay. And before you go ahead with this, let's establish high bit rate and wait 1 on that. And then as we go through the procedure we want you to wait when you get power on MAIN B so we can take a look at MAIN B without any loads on it before we start charging the batteries.

Okay. I understand you want high bit rate on the LM or CSM just before we start this?

That will be high bit rate on the LM, and stand by for it.

Okay.

Okay, Jack. Before we go ahead with this, what we want to do is read you the reverse—the normal reverse procedure.

Okay. I'm ready to copy.

Okay, Jack. I got the start on how you reverse this procedure. Ready to copy?

Go ahead, Jack.

Okay. First you want to reverse the battery charge procedure. To do that, on panel 3, switch BATTERY CHARGE, off; AC INVERTER 2, off; panel 5, MAIN BUS TIE BAT Alfa Charlie, on, up; panel 250, circuit breaker BAT Alfa, POWER ENTRY, and POSTLANDING, open. Read back.

Okay, Jack. On panel 3, BATTERY CHARGER, off, AC INVERTER 2, off; on panel 5, MAIN BUS TIE Alfa Charlie, on; panel 250, CB BAT A, POWER ENTRY and POSTLANDING, open.

That's affirmative, Jack, and then if you'll go back to the rest of the circuit breakers on that list, and just opposite—Open them all up. Stand by 1.

Okay, Jack. Go back to the battery charge procedure I gave you. And, in order to terminate charge, just—You'll just have to write “Open” or “Off” next to the circuit switch that I gave you. So on panel 250, that circuit breaker you've already opened; on panel 275, INVERTER POWER-2 MAIN B, open; panel 5, BAT RELAY BUS BAT A, open; EPS SENSOR UNIT AC BUS 2, open, EPS SENSOR SIGNAL AC2, open; BATTERY CHARGER, MAIN B, open; BATTERY CHARGER AC POWER, open; BATTERY CHARGER, BAT A CHARGE, open; INVERTER CONTROL 2, open; INVERTER CONTROL 3, open; you've already done the MAIN BUS TIE; and then BAT CHARGE switch to AC 1. Over on panel 3, you have already set the AC INVERTER 2 to OFF and then INVERTER 2 AC BUS 2, OFF; AC BUS 2 RESET to OFF. You have already put the BATTERY CHARGER switch to OFF; and your DC Indicator select to MAIN B. Over.

Okay, Jack. Do you want me to read it back to you?

No, if you've got something in the right-hand column for all of those, we don't want to have to do it. And now one more thing I owe you is how to untransfer LM power to the CSM, and I'll get that for you in a jiffy.

Okay. I'll be standing by to copy it.

Houston, 13.

Go ahead.

One thing I guess you probably all have considered it, but what heavy things can we store down there where the SRCs normally go to help increase our L over D?

I understand the question is what kind of heavy things can you store where the SRCs go.

Yes. They go down in the LEB underneath the computer, and the heavier things you have down there increases the L over D. We don't have any SRCs, so I was just wondering what heavy things—We could probably put some cameras, television cameras, things like that that normally pretty heavy down there in—that, in our SRC. No, we can't put the in our SRC, but we could put them in that container down there which would help decrease our L over D. Anything else you can think of would be greatly appreciated because we don't even have a throwaway station, so we're down a little bit in L over D.

Okay. Let me pass that question along, and get somebody working on it.

Souvenirs, I guess.

What souvenirs? (Laughter) All I've got is a Marine Corps foxhole-digging shovel.

You've got all you need then, buddy.

Okay. Ready to copy the power removal from the command module/LM umbilical.

I'm ready to copy. Go ahead.

Okay. This assumes that all the descent batteries are on line and ASCENT BATTERY 6 is on NORMAL FEED, as we said earlier. First thing you do is go in the CSM and look on panel 5 circuit breaker. LM POWER-2 MAIN B, open; LM POWER-1 MAIN A, open; circuit breaker EPS SENSOR SIGNAL MAIN B, open.

Hey, Jack.

Okay. That's a good readback. It concludes the procedure going both ways and now we just have to stand by.

Okay, when do you plan to start this?

Darn soon.

Did you say not soon?

No, we're going to do it pretty soon, but we want to have high bit rate, and we don't want you to give that to us until we tell you.

Okay. I think I'll go back and try to undamp up there. Do you have anything more for the command module?

We're discussing two items, but we don't have them ready right now.

One of them, I hope, is a foolproof alinement procedure.

Okay, Jack. Just for curiosity's sake, does FIDO have any information as to whether that helium—that helium tank dump affected our trajectory at all?

Okay, Aquarius. Our tracking data shows that since the helium dump, our entry angle has not changed from its value of 6.24 and somebody calculated that if we had a propulsive vent, that helium could roughly, at the maximum, only impart a DELTA-V of a half a foot per second or less, anyway. But we're continuing to track and as soon as we get some more info, we'll pass it along.

Okay. That's swell, Jack. Thank you.

Sure.

Your 6.24 sounds good.

I'm still awake, I guess.

Okay, Aquarius. We're ready. So we want some high bit rate. To do that, go over to panel 16 under COMM and close the PRIMARY S-BAND POWER AMPLIFIER. On your COMM panel -

Okay. Okay, Jack. Wait 1. While—I'd like to get the whole crew up for this if you don't mind.

Okay.

… they're ready to start. Yes, you want to get Fred-o up.

We want to transfer some power—I want to go to high bit rate here first, then want to transfer LM power to CSM, Fred.

Okay, Jim, I'll give you the COMM.

Aquarius, there's no great big rush. If you want to let Fred come up to speed slowly, why maybe that'll help out

Okay. …

And Houston, Jack is showing Fred the procedures before we start up.

Say again, Jim.

…

Aquarius, how do you read?

Loud and clear.

Okay. I'm hearing you now. I think I missed your last transmission, Jim.

Okay. Jack is showing Fred the procedures. Want to get him familiarized with them, and how to get out of any problems before we proceed.

Roger. No rush. Just let us know when you're ready. We don't want old Fred-o to slip a gimbal there.

Boy, if you took 120 hours out. Oh. … Okay. …

Houston, Aquarius.

Hello, Fred. Go ahead.

Okay, I guess the only question I have is in the first—the very first portion involving the LM here where it has me turn on the only BAT 6, and then turn off all the DESCENT BATTERIES. Are you still reading me?

Okay. I read you until after turn off BAT 6—Correction, turn on only BAT 6.

Okay, the question is “Only one ASCENT BATTERY BAT 6 on the line,” immediately followed by turning off four DESCENT BATs. Is that correct?

That's affirmative, Fred. That question has been banged around and we decided to go that way.

Let's see, we will be powering other BUS via the CROSS TIE BALANCE LOADS breaker. Is that correct?

That's affirmative, and we're reading a current of 11 amps right now.

Okay. Okay. I guess I'm ready, then. That's 11 amps?