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Frank Borman (CDR)
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That's what I was going to say. I can't see any reason to check anything other than the secondary loop, can you?
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Jim Lovell (CMP)
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Roger. I just got on the sextant and now looking at Texas, and the weather man is right, it looks like a pretty good day. Full of clouds down there, but not bad.
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Jim Lovell (CMP)
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I'll try. We saw it, of course, through the windows and through the monocular. I'll see if I can spot it.
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Jim Lovell (CMP)
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Yes, Jerry, I can see the bright spot. It's—I guess it's the subsolar point. It's off of South America, it appears to me. It is a grayish spot compared to the blue waters surrounding it. It's undefined in diameter, though I mean, it's not a clear round spot at all; it's just a raggedy one.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. We'd like to delay that request for a secondary loop check to a little better point as far as thrusting is concerned.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. We're replaying your television pictures now. We can see the Chilean coast and Florida.
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Frank Borman (CDR)
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Bill would like to ask the friendly Flight Surgeon's permission to take a Seconal so he can sleep.
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Jerry Carr (CAPCOM)
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Roger. Before Bill falls asleep, we'd like to have him go ahead and do that secondary EVAP check now at any time at his convenience, and if we don't happen to be able to monitor it with high bit rate, just let us know when you did it.
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Bill Anders (LMP)
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Okay. Somebody said something about checking out the evaporator—evaporators. What do you want to do?
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Jerry Carr (CAPCOM)
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Roger. Before we get too far along, we'd like to see, essentially with the secondary evaporator check, what we got on the redundant components check.
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Bill Anders (LMP)
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Roger. Now you want to check out the primary evaporator also, or did you decide it's not necessary?
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Bill Anders (LMP)
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Alright. What do you have in mind here in the way of activating the secondary loop prior to separation? It looks like if we do have a cabin fan problem, we won't be able to do a full-blown coldsoak. Is there anything that we can do that'll do any good?
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Jerry Carr (CAPCOM)
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Well, right now, Bill, in the checklist, we're showing this activation at about minus 1 hour. Let me check with EECOM for a minute and see if they got any more words considering the cabin fan situation.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. Looks like a good time. One hour before SEP—entry interface would be fine.
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Bill Anders (LMP)
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Okay. This coldsoak is built around the premise that you've got a cabin heat exchanger, in my view; and if you haven't got a cabin heat exchanger, I'm wondering just what you can do.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. We think it'll still do a little bit of good so we'd just as soon go through with it.
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Bill Anders (LMP)
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Okay. We wanted—we wanted to put it out prior to MAX range, don't you think? Get an idea of when we're picking it up?
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Jerry Carr (CAPCOM)
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Roger. Entry interface minus 4 hours is just about right for the VHF. That is about—oh, 142 GET.
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Jim Lovell (CMP)
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Outstanding.
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Mike Collins (CAPCOM)
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Righto. And we're looking at your pitch CDU readout down here and looks to us like you are about 25 degrees off the 180 for your PTC, and we were just wondering how come?
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Jim Lovell (CMP)
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We've been looking at that, too. It keeps wandering off in pitch for some reason more than yaw. I was just about ready to go back to it again. I had to go back one time, and I was just seeing how far she would drift. I thought it would drift out a ways and come back by itself, but it is not doing it.
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Frank Borman (CDR)
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Houston, Apollo 8. We're in the process of doing the trunnion bias check; then we will go to P23.
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Frank Borman (CDR)
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Okay. I was just checking. I just wanted to know how our thermal control was going before we left.
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Mike Collins (CAPCOM)
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Your temperatures are looking good, Frank. There is still a differential temperature between quads, but nothing that would cause us in the slightest to worry about doing P23.
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Mike Collins (CAPCOM)
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Roger, Jim. We've been looking at these stars that we gave you this time for P23. It looks like the second star, number 11, has a trunnion angle right out to the limit, about 49.7 degrees. And we're thinking it might be a good idea to switch you over to star 1, which has a much smaller trunnion angle. What do you think? Star 1 is Alpheratz.
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Mike Collins (CAPCOM)
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Okay. That will be then in place of star 11, star 1, and in place of lunar far horizon, lunar near horizon; and it remains two sets. Over.
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Mike Collins (CAPCOM)
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Roger. Fine. Old golden fingers there is getting so swift we missed some marks on the downlink. I wonder—if you hand recorded them, could you read us your three marks—trunnion angles, your three trunnion angles on star 2 and the last four trunnion angles on star 1. Over.
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Mike Collins (CAPCOM)
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Stand by. We're not reading you good enough, so we'll wait until you get a better OMNI.
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Frank Borman (CDR)
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Okay. Star 2 trunnion angle, first one 05245, second one 05243, next one 05241; last 4 trunnion angles 04133, 04133, 04132, 04132.
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Frank Borman (CDR)
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Can you give me some idea on the updates from the midcourse that we might need, and all that good stuff, Mike?
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Mike Collins (CAPCOM)
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Okay. We're predicting at the nominal time of your next midcourse, which is entry interface minus 2 hours—we're predicting 1.4 foot per second burn which changes your gamma at entry interface by a tenth of a degree. Right now with no further maneuvers, your gamma is minus 6.39 degrees, and we're going to steepen it up very slightly to hit the center of the target line, and it will be after the maneuver minus 6.51. Over.
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Frank Borman (CDR)
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No. I just wondered—we hadn't heard whether we were going to do it or not and so on.
Spoken on Dec. 26, 1968, 9:23 p.m. UTC (55 years, 10 months ago). Link to this transcript range is: Tweet
