Spacelog Apollo 13

Stand by.

Okay. Go ahead.

Okay, Vance. The readings that you wanted; are you ready?

Ready to copy, Jack.

BAT Charlie, 37.0; pyro A, 37.0; pyro B, 37.0; SPS helium pressure, 3450; and just for kicks, nitrogen A, 2300; nitrogen B, 2400; CM RCS injector temperatures: 5 Charlie, 4.5; 5 Dog, 3.5; 6 Alfa, 4.0; 6 Baker, 4.6; 6 Charlie, 4.0; 6 Dog, 3.8; battery manifold pressure, 4 Alfa, 1.4.

Okay, Jack, We got it. Thank you very much.

Okay. How does the telemetry look on our—on the old Odyssey?

It doesn't look too cold. Looks pretty good.

Okay. Thank you very much.

You bet.

We're going to need him.

How does it feel, Jack?

I'll tell you, Deke, it's cold up in there. I don't know whether we'll be able to sleep up there tonight; it must be about 35 or 40 degrees.

Roger. That's just what I was worrying about.

Right now, we're getting two sets of CWGs on.

It's not uncomfortable at all in Aquarius, but it definitely is cold in Odyssey.

Roger.

Okay, Vance. Jim's back on.

Go ahead, Jim.

We just had a change in watch; that's all.

Aquarius, Houston, Over.

Go ahead, Houston.

Jim, two items: in the command module, we wish to verify that the PYRO BATTERY selector was left in the main position. And we're ready to have the POWER AMP circuit breaker on panel 16 pulled, whenever you are ready.

Okay, Vance. Fred just tells me that he put it there, and we're checking that again about the PYRO BATTERY selector in the main position.

Okay. Understand that you are checking it.

And I will pull the POWER AMP circuit breaker.

Houston, Aquarius.

Go ahead, Jim.

How does number 2 battery look to you now?

Stand by.

Aquarius, Houston.

Go ahead.

Jim, it looks like it was probably a sensor problem; the battery number 2 is load-sharing well. And we see no indications of higher temperatures in the glycol loop or anything that would make us think that it is heating up.

Okay. Thank you.

Houston, Aquarius.

Roger. Go ahead.

I just want to talk over a little philosophy here. Fred told me that at one time you came up and told him that we were a little steep on the entry angle, and now our burn is going to make us—give us a steeper angle. I just want to make sure that we're all talking about the same thing, that, in essence, at this particular situation, we're shallow, are not steep, and we are going to increase the angle.

Jim, the situation is that, at the moment, we're a little bit shallow, and retrograde midcourse is going to put us more in the center of the corridor. Over.

Okay; fine. I just wanted to make sure. Fred had written down some time ago, that—that our angle now was about 71 and we were going to do a midcourse of 7 feet per second because its appears that we're going to shallow it out. I think we're all talking the same language now.

Roger. And, I guess it follows, but your perigee is a little bit high right now, too; so that will be bringing it back—back down, that is.

Yes. Yes, that's the important thing.

One other question, Jim. Our readings down here say your LM cabin's about as cold as the command module cabin. Is that right?

Well, we really don't know. There's usually two people in the LM cabin, and it's a lot—It seems to be a lot more compact, and so we don't notice the coldness down here as we do in the command module.

Houston, Aquarius.

That's affirm.

Aquarius, Houston.

Go ahead.

Jim, we're setting up your burn for 105:30, and we'll be working up a pad, et cetera, based on that time. Over.

Roger. The time will 105:30.

And, additional point; I guess this one's for Jack. Do we have any idea why we couldn't read the MAIN BUS B voltage a while back when first he didn't get it and then later he did?

Yes. I think we have a reason for that. Stand by.

It appears, Vance, that the battery charge circuit breaker which appeared to be in, wasn't in. Fred pulled it and reset it, and then he started getting readings.

Roger. Which circuit breaker was that?

It was—It was the battery charge circuit breaker that allows you to read volts, but we haven't—don't know the exact name for it yet.

Okay. Understand.

The name is BATTERY CHARGER BAT B CHARGE Jack tells me.

Okay. BATTERY CHARGER BAT B CHARGE.

Aquarius, Houston.

Go ahead.

Have you opened your—just curiosity—Have you opened your food locker just aft of the LM data file? Over.

Yes. It's been opened.

Okay. Just checking. Thanks.

. .. meal had come through.

Good.

It came at the right time.

Aquarius, Houston. Over.

Go ahead.

Jim, we have some CSM temperatures here for you that might be of interest, if you're ready to copy.

Roger. Go ahead.

Okay. Your quad package temperatures range from 85 degrees to 44 degrees. Your CM RCS injectors range from 44 degrees to 21; and your heat shield is well above its lower limits in all the various locations. Temperatures appear to be cycling based on Sun angle, and it's no sweat. They all look very good.

Were you calling, Houston?

Negative, Jim.

And, Houston, how do you read Aquarius?

Read you loud and clear, Fred. How do you read?

Okay. …

Roger. We were just about to send you up some items of information pertaining to the burn. Are you ready to copy?

Stand by.

Okay.

Okay. Go ahead, Vance.

Okay, Vance. You're saying we should start into the PREP in the contingency book at about 104:30, and I'll talk this over in a minute with Jim and we'll get back with you on it. When in the burn attitude, we should see the Sun right at the top of the AOT, and I assume this is detent number 2. Jim and I'd already been talking about that, and just eyeballing the terminator in the Earth, we figured the Sun at about something like a 70-degree angle—65-degree angle, so that'll be right up there. We get one burn rule that says if the rates are greater than 10 degrees per second, shut her down. And, after we trim, you want me to leave 470 up for a while so you all can have a look at it, and you'll tell me when to get rid of it.

That's right, Fred. And, if you have any questions at all regarding the alinement, why please let us know. We'll be happy to answer them, like alining on the Earth, as was described before. Also, you should know that the pitch is the most critical attitude so far as errors are concerned in this burn; but, as I said, it's still not very sensitive.

Yes, the—and unfortunately, the way we're looking out the window through the COAS, we can aline the yaw and roll pretty well, but it's the—Sun that has to get us pitch.

Right. And—and a correction on this DEDA 470 thing. Request that we let you—Give you a GO before you trim. Over.

Say—Say again, Vance, on that last.

Roger. We would like to see address 470, and give you a GO before you trim. Over.

Oh, okay. I—I see. Okay. After burn, we'll leave 470 up a while and wait for your word to do the trim.

That's correct. How was the sleep?

Okay. And -