Spacelog Apollo 8

Standby.

Apollo 8. Let's go back to battery Bravo, and we'll finish that one off before we start in on Alfa.

Roger. Battery Bravo.

Houston, Apollo 8. Do you want us to maneuver to any particular attitude for a water dump, or do you want us to go to PTC attitude?

Okay. Let's go PTC.

And give us the angles, please.

Okay, Apollo 8. Let's do the same angles we had before: that's pitch 242 and yaw 20 on the PTC attitude.

Houston, we're preparing to dump our waste water now.

Houston, Apollo 8.

Go ahead, 8.

We noticed on our system test battery vent pressure that when we opened the battery vent valve, we get an immediate drop-off to pressure which nulls out at about two-tenths of 2—to three-tenths of a volt. And we think this is zero at the battery manifold. Do you concur?

Okay. Stand by. … stand by one, and let's check it out.

Apollo 8, I cut you out there. What did you say on the last one?

It looks like probably that zero psi corresponds to about three-tenths of a volt on the test meter. We've had it happen a couple of times, where the pressure would drop rapidly to this setting, as if it were zero. Over.

Roger. We'll look at our data here and let you know what we see. Are you going ahead with the water dump now?

Roger. We'd—we're pausing here on the water dump, though, just to verify that the battery vent—the line is clear as indicated by a battery vent pressure of zero.

Apollo 8, Houston.

Go ahead, Houston.

Okay. Number one on the list of things is that the flight plan shows CDR should hit the sack. Number two, kind of a summary of your burn. All your SPS and systems look GO. The trajectory shows that you have a CPA with a mode of 69.67 miles and the time of pericynthion is 69 plus 10. You do have a capture on a good free return. It's a little bit early to completely evaluate the trajectory for corridor control. You'll have no update to the TLI plus 11 block data. After looking through the CAL curves, it looks like the battery-vent pressure is actually zero at 0.2 to 0.3 volts, so that—we agree with you there, and you can go ahead with the water dump. We still have the COMM check to do whenever we get ourselves in a good high gain look angle and whenever it's convenient for you. Over.

Thank you very much. That was a very fine resume you sent in. We're right now in the process of trying to dump out the water and the UCDA's and so on and so on. So we'll get with you on the high gain as soon as we can.

Okay. Good burn.

Houston, what do you want to dump the waste tank down to?

Apollo 8, I would like you to dump the waste tank to 25 percent.

Hey, we're dumping now, Houston.

Okay. Thank you.

Apollo 8, Houston.

Go ahead, Houston. Apollo 8.

Roger. Do you folks have your WATER QUANTITY switch in the POTABLE or the WASTE WATER TANK position now?

We're in the WASTE TANK position now, and we're dumping UCDA's first, Houston.

Okay. We weren't watching any waste quantity decrease, and it looked like the nozzle temps indicated that something was going on, and we were trying to dope out what was going on.

Well, there's a lot of stuff going out I'll tell you. How do nozzle temps look?

Oh, about 81.

Okay, Houston. We're going to dump the waste tank on down to about 25 percent.

Okay. Thank you.

Houston, Apollo 8. Do you copy?

Affirmative, Apollo 8.

Okay. Tell Zeke Thomas to wake up and keep an eye on the waste tank servicing.

It'll take a minute to think of something appropriate.

You're slowing down.

How are the nozzle temperatures looking, Houston?

Man, you're looking pretty small down there now, Houston.

High-gain antenna to AUTO TRACK.

Correction. That's -

AUTO.

We're in AUTO WIDE BEAM, and you can go ahead and dump the tape.

Okay. I'd like for you to go to NARROW BEAM.

Okay. Going to NARROW BEAM now.

Roger.

And I'll give you a call when we get ready to work on the tape.

Okay. We're still in PTC, so you're only going to have it for about 10 or 15 minutes.

Okay. We've had some problems with our displays, and I think they're straightened out now, but you may have to keep us advised if we run out of limits in case we display again.

Roger.

Say, while we're standing by here, Apollo 8, the service module quantities that we had listed—we're going to try to update them, if you want to call out your quantities. Have you checked them with your charts?

Negative. I haven't gotten around to that. Stand by.

Okay. There's no hurry on that. Just wondered if you had done it; we will check it against what we've got on our norma-gram.

I'm showing a SPS helium pressure, about 3570, indicated on board.

Roger.

And fuel LOX tank pressures are 177 and 176, respectively.

Okay.

N₂ A is 2400, B 2500.

Okay.

Okay. And our back room tells you that you've got the right F stop.