Spacelog Apollo 13

Only other readouts we need are those on page 3-13 of the flight plan. BAT C, pyro BAT A, pyro BAT B, RCS A, B, C, and D readings, and DC INDICATOR select main A or B.

Okay. Stand by.

And, Vance, we're still charging BAT B. Did you want to dispense with that in a few minutes?

Stand by on that, Fred.

Okay, Vance, I've got your readouts on page 3-13 of the flight plan.

Okay. Ready to copy.

Okay, BAT C is 37, pyro BAT A is 37, pyro BAT B is 37, RCS A 94 percent, B 95 percent, C 93 percent, D 96 percent.

Roger. Copy that.

Apollo 13, Houston.

Go ahead.

Okay. In answer to the battery-charging questions, I calculate it should be fully charged at 12:35. Play that one, though, the same as the waste vent. If you want to do it earlier because you're turning in, why that's fine with us.

Okay, we'll continue on with a few other things we got to get done, and just before turning in, we'll check with you, and you can remind us then.

Houston, Apollo 13. Give me a call when you're ready for E-memory dump.

This is Houston, 13. You are weak. Please repeat.

Okay, Vance, give me a call when you're ready for our E-memory dump.

Okay, 13. We're not quite ready yet. We'll give you a call when we're ready.

Roger. Go ahead.

Okay, Vance. I understand you're ready.

Negative, GUIDO isn't quite ready yet.

Okay. I thought I heard you call us.

But we're ready now, Jack, so GUIDO says he's ready to take it.

On the way down.

Houston, Apollo 13.

13, Houston. Go.

Okay, Vance. Requesting clearance now to turn the vent valve back to CLOSE again, and also the battery charge off.

Roger. That's fine with us, Jim. Proceed.

Apollo 13, Houston.

Go ahead, Vance.

We think the spacecraft's looking in good shape. Nobody has any comment down here before you hit the hay.

Okay. Row do they think we stand on the way of consumables so far?

You're looking in good shape in all respects—consumables-wise.

13, Houston.

Okay, go ahead, Vance.

Just the last comment, Jack. Would you clear Hal, please, so he doesn't burn his lights out there tonight?

No, I—I was just—I'll do that for you.

Okeydoke.

And we'll see you in the morning, huh?

Okay. It'll be just a minute or 2 yet. We have to finish up a couple more chores.

What do you mean? It is morning.

Hey, that's right.

It's been a long day, huh?

Yes, it sure was.

Hello, Houston. Houston, Apollo 13. Over.

Good morning, 13. This is Houston. How are you?

Read you loud and clear. We had a fairly good night's sleep.

Okay. Real fine. At your leisure, you can give us radiation reports, I guess. We are getting a consumables update together for you, and a few other little details whenever you are ready to talk. About the only major thing on the spacecraft is that it's been getting farther away.

Okay. Well, that's to be expected, I guess.

And we're starting to charge battery A, Houston.

Roger on battery A, Fred. EECOM says battery B looks real good.

Okay.

Houston, 13.

Go ahead.

Okay. For information, Fred was on COMM last night; and he was over in the left-hand seat, and if you want our radiation readings, we just goofed. We left them all in the suits which are now nicely tucked away. We are going to get out Jack's suit in an hour or so anyway, and we'll get his dosimeter out if you wanted to get the reading on that one.

Okay. That will be satisfactory.

Okay.

And in exchange for that, the surgeon would like to have a rough number of hours each of you slept and a qualitative verb to describe whether it was good, fair, or poor.

Okay. Stand by.

Okay, Houston. We had an average of around 5 or …

Jim, Houston. Your COMM got pretty garbled there just as you started to talk.

Okay. Houston, Apollo 13.

Okay, 13. You're loud and clear again.

We averaged about 5-1/2 hours' sleep apiece, and we are estimating that the sleep was good.

Okay. Copy that. Let's see what else we have for you, Jim. Midcourse-2 looks like about 23 feet per second, approximately retrograde and on time. And it's holding real firm now. For your information, and you don't need to copy this down, because it's still pretty soft, but we have an S-IVB impact of about 8.57 south and about 33.9 west, which is a little west and a little south of the flight plan value. We have it at a GET of about 77 plus 51 which is just before AOS, and the LOI pads are a little bit late, and as I say, it's still pretty soft, and we'll be updating you with firm numbers.

That's fine, Joe. Just as long as it doesn't hit Cone Crater.

Okay. And I'll have a consumables update for you in a little while, and I have a small flight plan update for you sometime a little later on when you're ready to copy. There's no big deals in it.

Roger.

And, 13, Houston. We'd like to verify that you cycled the O₂ cryo fans. We saw the H₂, but we didn't see the O₂ get stirred up.

Yes, Joe. We did, and it kind of looked like we might have had a little stratification because right after we put them on, we had a CRYO PRESS light.

Okay. EECOM told me that might happen, and he was right.

Okay, Joe. We're ready to copy a flight plan update and your consumables.

Okay, Jack. The flight plan update has a couple of items in it, and the first one we'd like to do is to update the T_ephem values in the G&C checklist on page G/9-2. These are fairly small changes, but in case you need them, we'd like you to have the exact numbers. Over.

Okay. Just a minute. I'll get it out.

Joe, was that the G&C checklist, page 9-2?

That's affirmative. G&C, page G/9-2.

Okay. Go ahead.

Okay. On that page in line 04, column B, change the number from 03366 to 05253. Over.

— 53.

Okay. And in line 05, column B, change from 11000 to 33661. Over.

33661.

Okay. That's right. The only other thing I've got for you, Jack, is three additional questions for the booster systems debriefing, which is to take place at about 25 hours, and we thought we'd pass these questions up to you early so you can consider them. Over.

Okay. We're ready to copy.

Okay. The first extra is, and let me get the original question because this question says, “More specifically on item 2,” and item 2 says, “Were there any significant changes in the noise vibration level during the single stage of powered flight?” Specifically, describe your observations during the early S-II center engine out-off, and approximately 90 seconds prior to TLI cut-off, you reported a high vibration in the S-IVB. We'd like you to describe the buildup of this vibration and its behavior through cut-off. Over.

Okay. Essentially, what you'd like us to talk about is vibration sequence during the early S-II cut-off of the center engine and also describe the vibrations that we encountered during the S-IVB TLI burn. Is that correct?