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Vance Brand (CAPCOM)
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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.
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Vance Brand (CAPCOM)
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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?
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Jim Lovell (CDR)
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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.
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Jim Lovell (CDR)
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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.
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Vance Brand (CAPCOM)
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Have you opened your—just curiosity—Have you opened your food locker just aft of the LM data file? Over.
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Vance Brand (CAPCOM)
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Jim, we have some CSM temperatures here for you that might be of interest, if you're ready to copy.
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Vance Brand (CAPCOM)
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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.
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Vance Brand (CAPCOM)
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Roger. We were just about to send you up some items of information pertaining to the burn. Are you ready to copy?
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Vance Brand (CAPCOM)
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Okay, Fred. First of all, preparations for this, starting with contingency checklist, page 24, we would recommend should start at 104:30 GET, and we'll be happy to receive any comments you have on that, though. Second point: when you're in the burn attitude, you should see the Sun at the very top of the AOT. It'll be splitting the cursor, when your cursor's set at zero. One thing to be aware of though, that it'll slip right out of the AOT very easily since it'll be very sensitive to roll and yaw. Understand that's in detent 2, by the way. Next point: the burn is very insensitive to burn time and attitude. In other words, if necessary, we can slip it if there's any problem at all, and attitude isn't too critical. So that brings us to the point that we only have one real burn rule; that is, if—rate about any axis gets to 10 degrees a second, that's the limit to stop the burn. Next point, after you finish the burn, and before you trim, request that you leave DEDA in address 470 up a while so we can take a look at it, and let us holler when we've seen it, and then proceed on. Over.
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Fred Haise (LMP)
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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.
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Vance Brand (CAPCOM)
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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.
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Fred Haise (LMP)
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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.
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Vance Brand (CAPCOM)
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Right. And—and a correction on this DEDA 470 thing. Request that we let you—Give you a GO before you trim. Over.
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Fred Haise (LMP)
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Say—Say again, Vance, on that last.
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Vance Brand (CAPCOM)
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Roger. We would like to see address 470, and give you a GO before you trim. Over.
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Fred Haise (LMP)
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Oh, okay. I—I see. Okay. After burn, we'll leave 470 up a while and wait for your word to do the trim.
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Fred Haise (LMP)
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Okay. The picture that Jim gave me on his view through the COAS was within the—the partial Earth, the lit portion laying in the top half of the COAS with the cusp laying right on the Y-Y line. And so the—The whole dark part of the Earth would be at the bottom part of the Earth, except a very thin crescent of the dark part to a line—line above the Y-Y line.
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Fred Haise (LMP)
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And that in essence—that in—Yes, that in essence would put our X-axis pointing toward the Sun.
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Vance Brand (CAPCOM)
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That's correct. The plus X-axis pointing toward the Sun and perpendicular to the terminator of the Earth.
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Vance Brand (CAPCOM)
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Two other points, Fred. One is that we don't expect hardly any misalinement of your engine for the burn, so we don't really expect any rates throughout the length of the burn, especially since it's at very low thrust. Second point, request you verify that your suit temperature rheostat's in FULL COLD. That—if it—If it were in FULL COLD, that might help your cabin temperature situation. It might bring the temperature up.
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Fred Haise (LMP)
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Okay. Your 104:30 time to start in is—sounds pretty good. That'll give us lots of time to get set up with the attitude business, in case we have any trouble stopping PTC and getting there and—That will give us a little time to be sitting and waiting, all set up.
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Vance Brand (CAPCOM)
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Right, Fred. We just noticed a 2-pound drop in your water quantity. Have you guys had a drink recently or do you know any reason why it might have dropped? Over.
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Vance Brand (CAPCOM)
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Fred, that may be a funny in the data. The rate's gone back to normal; and we'll keep an eye on it, but we don't think you should worry about it too much.
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Fred Haise (LMP)
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And, Houston, you might just let us know if there's any chance it's going to slip further down the road, because we're going to kind of hold to that 104:30 start time. And if you're going to delay any, we'll delay accordingly.
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Vance Brand (CAPCOM)
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Roger. Copy, Jim. And the—Jack's going to read you the pad right now, so I recommend you go ahead and get started. You shouldn't be delayed by the pad at all.
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Vance Brand (CAPCOM)
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Okay. A P30 maneuver pad on the DPS: purpose is midcourse 5, NOUN 33, 105:30:00.00, NOUN 81 is N/A, HA is N/A, perigee, plus 0019.8, 0.007.8, 0.15, the rest is N/A. Shut down the engine at 1 second prior to the end of burn time. Shut down at 14 seconds manually. Ullage is four jets for 10 seconds, 10-percent throttle. Go ahead.
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Fred Haise (LMP)
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Okay, Jack. We've got a DPS midcourse 5: NOUN 33, 105:30:00.00; NOUN 81, N/A; HA N/A; plus 0019.8, 0007.8, burn time 0.15, the rest of the pad, N/A. Shut down manually at 14 seconds, ullage four jets for 10 seconds, and the entire burn is at 10-percent throttle.
Spoken on April 16, 1970, 3 a.m. UTC (54 years, 7 months ago). Link to this transcript range is: Tweet
