Spacelog Apollo 8

Okay. We'll put in a kit for some small waves.

Apollo 8, Houston.

Go ahead.

Okay. Why don't you drive it back over to the PTC attitude and put it back in ATTITUDE HOLD for the roll, and we're going back in and review the DTO requirement. You have about the same results, it looks like, on a cursory analysis all three times. So we're going to take another look and see if there is any reason to do it again. If so, we'll call you. You can go ahead and put it back in ATTITUDE HOLD now.

Houston, Apollo 8. Radio check.

Loud and clear, Apollo 8.

Okay, Ken. Thank you.

Roger. It is taking us a little longer to go through and rehash all of the entry checklist than I though, and we are just about to wrap it up now.

No problem. Just watch my gimbal angles for me, and give me a call if they get too close.

Apollo 8, Houston.

Go ahead.

We would like to look at a couple more DELTA-V tests on the EMS, and the general consensus is that we don't think there is any particular problem. We'd like to go ahead and take a look at what you get by running four or five more DELTA-V tests. And prior to that, we'd like to run one of these null bias tests; and since we don't have any way of monitoring any of this stuff on the downlink, I'd like to have you tell us each step when you turn the switch and different orders and things like that.

Okay.

Alright. I'll run a test.

Okay. The first thing we want is this null bias, 100 seconds.

You stand by, and I'll do a null bias for 100 seconds. Do you want me to put DELTA-V in AUTOMATIC and let it alone for 100 seconds?

That is affirmed.

Going to DELTA-V; going to AUTO -

Now.

Roger.

Went to one-tenth and back to zero.

Understand; plus one-tenth and back to zero.

One-tenth, now it's a minus one-tenth and back to zero; no, it's not zero yet; wait a minute.

Now it's up some, minus 4; 0.4, that is.

Roger.

Minus 25.

Roger.

Minus 26.

Minus 0.7, and there is 100 seconds; minus 0.7 at 100 seconds.

Roger.

Now what do you want?

Okay. If we go back to mode, switch to stand by and FUNCTION switch OFF.

Roger.

Okay. Now we'd like to do a couple of DELTA-V self-tests.

Okay. 71586.8.

Roger.

Say you're going AUTOMATIC?

Roger.

Going to a DELTA-V test now. Counting down.

Apollo 8, Houston.

Apollo 8, Houston.

You back, Ken?

Apollo 8, this is Houston.

Roger. Read you.

Okay. We got caught in a station handover there. I didn't copy anything after you said you were putting it to DELTA-V test.

I ran—I ran three tests during that handover. Two over minus 19.6—two of them are minus 19.8; and one of them, minus 19.6.

Okay. That sounds real fine.

Roger.

Okay. The other thing that—sometime prior to entry—and we're going to be looking at it—is the normal entry test pattern, and it's called out presently in the checklist as something we do around an hour. And we'd like to check if you can read the number on the scroll that is up now so we can see where we are in the test test pattern sequence. We're considering taking a look at one of these test patterns before we get into an hour so we can have more time to think about it in the event that there should be something anomalous in it.

Why don't we do it right now? We're on number 8.

Okay. Understand; that's number 8, right?

Roger. It takes an awful long time to run them over there anyway. It won't hurt to do one.

Hey, Ken.

Yes, sir.

Another little thing about this EMS: you know, we had it set up when we separated from the booster —

Roger.

— and the shock of the separation—the shock of the pyro's blowing in separation knocked it up to 100 and something.

Understand. Knocked it up to 100.

Roger.

Was the pyro separation enough that the—you felt a sensable g in the bird?

Roger. Let's just say there wasn't any question we were separating.

Roger. Understand.

While you are checking the scroll, find out which entry pattern I should be using this bird in.

Apollo 8, Houston.

Go ahead.

Okay. While we are verifying that scroll position—they are talking it over in the back room about that now—I would like to go ahead and run down the checklist with you for entry.

Go ahead.

Okay. Looking on entry 1: the second item there is the 12-hour Kelvin cold soak, and in discussions I here and preflight, I think it is agreed that we don't want to do the cold soak there. So we are going to delete that step 2. And what it amounts to is, I think we do want to do a cold soak, and we certainly want to exercise the water boilers prior to entry in order to insure that we don't have one that is dried out, in the same manner that we had one dried out prior to LOI. And we are working on some procedures for that, and we'll have to come back to you with those a little bit later, and we will try to do it sometime when Bill's on the line so that everybody can get in on the loop at the same time. We would like to add a step between 8 and 9, or as part of step 8. This is all on page E-1, where we turn the VHF to Simplex A at minus 4 hours and 35 minutes. Now this will be beyond two-way VHF range, but it will make sure that we do have it on at the time when we pick it up. We were able to get out to 20 000 miles with a downlink, and we are checking on the uplink signal. So if we put it on at this point, we know we have it on well in advance of any time we might be able to get into the VHF.

Okay.

Okay. I guess maybe I have that backwards. They copy—you folks copied the VHF out to 20 KM. We're checking on the—on the downlink into that now. But in any event, this 4 hours and 35 minutes will get it well in advance of that.

Roger.

Okay, 8. We just got an answer back on the test patterns. We thought it was—We had 25 test patterns which are allocated to ground test, and these are the ones we've been looking at. Then there are five more that are allocated to flight, and the only difference in these patterns is that the flight patterns have instructions actually written on them; so if we are looking at test pattern 8, that means that we're still working on the ones that were allocated to the ground test, so there was no problem there. And I'll get you a number for which pattern we should be using for entry; working on that one right now. So we would like to go ahead and run through these.

I don't mean the —

Say again, Frank.

I don't mean the test pattern. I say, I don't mean the test pattern. We asked them to put the supercircular on the number, the first place on the scroll; I'm sure they did. I'm sure it's the first pattern, but I just wanted to make sure that's right.