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Ken Mattingly (CAPCOM)
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Apollo 8, Houston. Confirm that battery B is a little bit lower, and this is attributed to the parasitic loads that are on there.
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Bill Anders (LMP)
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Okay. I just didn't see the same kind of drop for A. So if you think it's okay, it's fine.
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Ken Mattingly (CAPCOM)
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That's affirm. You don't have the same parasitic loads on that; B is actually drawing some.
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Ken Mattingly (CAPCOM)
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Apollo 8, Houston. We've seen enough of the secondary evaporator. We would like for you to wait about 2 minutes between the time you go to RESET and the time you turn the pump off.
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Ken Mattingly (CAPCOM)
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Okay. Looking over the—our redundant component check, it appears we have not yet checked the integrity of the secondary loop radiators; and if you haven't done that, sometime we would like to open up the secondary radiators but not flow through them and just measure the accumulator pressure.
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Frank Borman (CDR)
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Houston, we don't show that in our pre-LOI check, but we're willing to go ahead and do it if you want to.
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Ken Mattingly (CAPCOM)
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Roger. We just noticed that it isn't there, and, yes, we would like to. You understand that we are not proposing that you flow, but merely we check for any pressure decay.
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Frank Borman (CDR)
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Okay, Houston. We're going to blow the secondary, I mean, open the secondary RAD for 30 seconds now.
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Ken Mattingly (CAPCOM)
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Apollo 8, Houston. You take your tape recorder to stop, and we'll reset it then and give it back to you.
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Ken Mattingly (CAPCOM)
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Okay. We still need to talk about the REV 2 attitudes we're going to use here to work around the fact that you have a fogged center window. Whenever that's convenient, we'd like to go over what your thoughts are on the subject so we can make sure we can get our flight plan squared away.
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Bill Anders (LMP)
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My thoughts are to make—to do with the best with what we have. We are not interested in changing a lot of things right now.
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Ken Mattingly (CAPCOM)
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Okay. The one proposal that sounds like it has some advantage to it: if we let Jim do his evaluation through the telescope, you do everything exactly the same except you turn and roll over 180 degrees so that your head's up, and let Jim do his tracking through the telescope and you'll still be a yaw right when you go to pick up your TV and that type of thing. It looks like that probably will cover everything. We can do that or we can just go as is and just have to let some of that tracking evaluation go by. Another alternate would be to have Jim look out the right-hand rendezvous window, and you may have to change your attitude in order to get the same picture there also.
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Frank Borman (CDR)
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I think we'll try to do that, but I don't—this is one of the things that we'll work out when we get there.
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Ken Mattingly (CAPCOM)
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Okay. The reason we were looking into it in the flight plan is, if you do want to try rolling over and flying heads up or something of that nature, we can help Bill get a little more out of his photography by giving him some new film settings and that type of thing. We'll have something like that available; in case you do fly heads up, why, we'll have some numbers, we can call up for film settings.
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Frank Borman (CDR)
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Roger. We are going to have to dump more urine here shortly. Will this bother your tracking?
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Frank Borman (CDR)
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Houston, just give us the time when we can start on it, and we'll hold off until you say so.
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Ken Mattingly (CAPCOM)
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Okay, and you can anticipate a handover between stations here on the hour, and you might get a slight glitch as we go through. I'll give you a call when we get back.
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Ken Mattingly (CAPCOM)
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Apollo 8, Houston. You're cleared for a dump at this time, and I understand this is the last gas station for a long time.
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Ken Mattingly (CAPCOM)
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That's affirm. Due to the tracking as you approach the LOI, they would like to minimize any of these type of perturbations.
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Ken Mattingly (CAPCOM)
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I'll bet. If you've got nothing else to do, I do have two charts in your LOI table that I need to give you some update numbers on.
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Ken Mattingly (CAPCOM)
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Yes, sir; I've got a couple of charts in your chart book under LOI, and I have some numbers to fill in, one of them being the chart of LOI DELTA-V magnitude versus abort DELTA-V.
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Ken Mattingly (CAPCOM)
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Alright. Mode 1, 5 hours, roll 1.38, pitch 7.89, yaw 357.37. Mode 1, 15 minutes, roll 180.73, pitch 29.46, yaw 1.65. Over.
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Jim Lovell (CMP)
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Roger. The new attitudes for the Mode 1, 5 hour Mode 15 minute are as follows: roll—for the Mode 1, 5 hour, roll 1.38, pitch 7.89, yaw 357.37; Mode 1, 15 minute, roll 180.73, pitch 29.46, yaw 1.65.
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Ken Mattingly (CAPCOM)
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Okay. That is correct. Now I also have to give you a couple of points to plot on that curve. The present curve you have drawn is based on a 60-mile perigee or perilune, and you right now have a 62-mile pericynthian; and the reason that your target is for 62 miles is to pass over the landing site, so I have five sets of coordinates for you to copy.
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Ken Mattingly (CAPCOM)
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Okay. We'll go in on the LOI DELTA-V magnitude 1600, abort DELTA-V 2450, two-four-five-zero.
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Jim Lovell (CMP)
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Okay. LOI DELTA-V magnitude 1600, abort DELTA-V 2450. Stand by just one. I have it; continue.
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Ken Mattingly (CAPCOM)
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Alright. The last one is LOI DELTA-V 2990, abort DELTA-V 5114. That is almost directly into the end of the present curve, 5114.
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Ken Mattingly (CAPCOM)
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Alright. And on the next one, you should have a chart (number 10), and we have three numbers to go in there for a Mode 3 gimbal angle.
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Frank Borman (CDR)
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Houston, could you give us some gimbal angles to point at the moon? I never have seen it the whole trip, and I'm wondering which way it is from us now.
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Ken Mattingly (CAPCOM)
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We are getting ready to give you a rundown on your systems. We're going over all the final steps, and we will tell you what we see in the way of trajectory and systems information. And once again, Dr. Joe Kerwin has brought over all the latest news, and we can read that up to you a little bit at a time if you aren't going to sleep.
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Ken Mattingly (CAPCOM)
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Okay. Here is one: the previously scheduled 72-hour cease fire by the Viet Cong went into effect today, 17 hours before the 24 hour allied truce was to begin.
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Ken Mattingly (CAPCOM)
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The gist of it was that the VC went into a cease fire earlier than the truce that we had planned on, as a Christmas holiday type.
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Ken Mattingly (CAPCOM)
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Loud and clear. Sorry to have stopped on you there. We are going over the summary of the systems data.
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Ken Mattingly (CAPCOM)
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Okay. I have a rundown on your systems here, GNC status. Everything looks real —
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Ken Mattingly (CAPCOM)
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Okay. We'll just start with EECOM business then, I'll give you a summary of your batteries; battery A, we calculate 38.3 amp-hours, battery B —
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Ken Mattingly (CAPCOM)
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Okay. Battery A 38.3, battery B 36.9, battery C, 38.5. That's looking pretty good. It looks like we got all the things back in that we took out, and we're running right along prediction. We would like to get a battery C voltage from you if you can just reach over there and switch it.
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Ken Mattingly (CAPCOM)
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Roger. Thirty-seven volts, Okay. The predicted cryo quantities at SEP: on oxygen tank 1, 170; oxygen tank 2, 170; hydrogen 1, 9.5; and hydrogen 2, 10.0. You essentially have single cryo tank capabilities all the way at full power now.
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Ken Mattingly (CAPCOM)
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The secondary coolant loop really looked good. Looks like you had a nice tight radiator and everything else on there was working right along the performance curves. Your main oxygen regulators both filled at 104 psi during our check. Looking at the lunar orbit, expect to be doing a water boil of about 1 pound per hour, and this is just an approximation; there's quite a variety of estimates as to what the water boiling requirements may be, might go anywhere from boiling lots to not boiling at all. The next water dump will be coming up after TEI, so you don't have to worry about any of that until you get through. Communications predictions are looking good, possibly a little bit better than what we had hoped for, and looks like we're going to get high bit rate on OMNI's with our 210-foot dish at Goldstone. This will be working for us on the first couple of rev's, and then we'll be switching sites, so we'll go back to using OMNI's for high bit. The voice quality on DSE is good. Your fuel cells have been running above nominal for the entire flight, and they really look nice and stable. There's been some destratification -
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Ken Mattingly (CAPCOM)
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Okay. Looks like may not be able to hack the normal voice. On the cryo tanks, we've had quite a bit of destratification, particularly in the oxygen, and you notice this during the fan cycles and DELTA-V's, so we're going to be sure and we'll remind you again to stir up the oxygen prior to LOI. CMC is running along like clockwork. G&C tells us that the RCS quantities are looking good. You're using the same amount as predicted for your PTC and for your alignment. What we have in the way of a redline: we're going to tell you that you can use 30 percent per quad in lunar orbit. Now this is quite a bit of fuel to play with, and you can take 30 percent and subtract that from what you have to completion of LOI, and that will be a good number.
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Ken Mattingly (CAPCOM)
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On the SPS, the oxidizer and fuel feed line temperatures are 75 and holding steady. The service module RCS quad package temps are cycling and holding between 120 and 140, and looks like we're getting good normal heater operations. We plan to have you in a 60-mile circular orbit after LOI 2. And we should have some PAD's for you on the LOI burn at about 67 hours.
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Ken Mattingly (CAPCOM)
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Okay. We're still going through the tracking, and as you know, we're going to hold down on the water dumps and so forth during the last couple of hours in and out, sort of aid the tracking procedures. Everything is running along the line normally now. Do you have any other specific questions? We are looking for an angle on the moon. I guess that about summarizes the system. Everything looks GO right now.
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Frank Borman (CDR)
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Okay, Ken. Thank you. We just completed day 3 meal C, and now are going to break up and each take a rest period before LOI.
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Ken Mattingly (CAPCOM)
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Okay, real fine. Everybody wanted to ask if you wouldn't try and get some sack time here before we go in. It's going to be a big day.
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Ken Mattingly (CAPCOM)
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Finally found out where the moon is, and your present PTC attitude—if you happen to look out the right window as you go by—roll attitude of 320, it should be there.
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Ken Mattingly (CAPCOM)
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Okay, Apollo 8. You're cleared to go ahead with that pill. Take—Surgeon recommends a small one.
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Ken Mattingly (CAPCOM)
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Apollo 8, Houston. If you can, we'd like to have you stir up the oxygen cryo.
Spoken on Dec. 24, 1968, 2:50 a.m. UTC (55 years, 10 months ago). Link to this transcript range is: Tweet
