Spacelog Apollo 13

And, Jack, just think. You thought you were going to sleep through all your watches.

Say again, Jim.

I said, you thought you were going to sleep through all you watches.

Well, you keep waking me up.

Aquarius, Houston. You notice anything?

Yes, Jack. I was just about ready to call you. Underneath quad 4, I noticed a lot of sparklies going out.

Can you hear or feel anything?

No, I sure can't, but I think it changed our—it changed our PTC. Let me check and see what the drift is.

Okay. She's going down through 600 now.

I think we're probably going to have to reestablish PTC. Yes, we got pretty fast yaw drifting, Jack.

Houston, Aquarius. What are your plans?

We're thinking about them right now. Did you say it yawed some?

Yes, I was in a right yaw and now I'm in a left yaw; at a much faster rate than the one we put in PTC.

Okay, Jim. We're talking it over. Stand by.

What's the SHe tank down to now, Jack?

Okay, Jim. It's going through 125 pounds now. And we understood you to say —

Okay.

— that it reversed your yaw. Is that affirmative?

Sure did, Jack. It reversed my yaw completely and put in a little pitch, I think.

But more than anything, it reversed my yaw.

Roger. Have you effectively established PTC in the opposite direction then?

Well, you could say that. I'm not too sure just what kind of pitch or roll I've got, coupled with the yaw. I just saw the Earth go by the LMP's window here, not too long ago at a rather faster rate than we had going the other direction.

Perhaps you can tell how fast I'm having to shift OMNIs.

Yes, we can tell the COMM cycling back and forth.

Is that what they call a nonpropulsive vent?

Right. I'd hate to see a propulsive one.

You and me both.

It's going through 50 pounds now. So, are you seeing fewer sparklies?

Yes. Much fewer. Not any at all, now. I'm not sure whether that vent gave me reverse yaw and roll—left roll—that's—if that's what it gave me.

You say you think it might have given you some left roll as opposed to opposite yaw.

I'm sure it gave me the yaw, Jack, but I'm not too sure …

Okay. We'd kind of like to watch it, see what happens for a little while before we make a recommendation. However, we'll need some inputs from you on that.

Well, we're in no trouble up here as far as—as far as the yaw goes. Everything's fine. It's faster than we had set up before. We just wanted to get into proper thermal constraint, and it's going to take me 15 minutes to get the thrusters up anyway.

Okay, Skipper. We don't see any thermal problems as a result of this change. If we see some communications problems, we may have to do something different, but so far, so good. And we'd kind of like to hear from you on LPD numbers, if you get anything going by the window.

Okay. Will do.

Okay, Jack. The Earth just went through at an LPD of 26 degrees.

Okay. The Earth went through at 26 degrees going the opposite direction this time—left to right. Is that right?

From left to right. That's affirmative.

Of course, the only other thing that we'd be concerned about is what change in your velocity this might have had and what DELTA-V it imparted, and we'll have to look at that for a while before we are able to determine it. And, if there is no significant change, why, we prefer just to leave it the way it is.

Okay, Jack. We're going to get a time on a revolution here, and maybe that'll help you out.

Right. And, for your information, the tank went at 1937.

That's two thousand—1937?

Right.

Okay, Jack. The Earth went through again at 18 degrees on the LPD.

Okay. Earth at 18. Thank you.

Okay. And we didn't see the Moon that time.

Okay, Jack. The Moon went through that time at 32 degrees on the LPD.

Okay, Jack. Well, we didn't get the Earth that time. The Moon came back through at about 10 degrees, and now we're getting to the Earth again. Stand by.

Okay. The Earth came through the LPD at 62 degrees that time. And the total time for the two revolutions,—I missed the Earth revolution before, but the total time for the Earth's two revolutions was 3 minutes and 50 seconds.

Say again the time and the—and also the LPD number. You're in the background noise, Jack.

Okay. Okay, Jack. LPD that time was 62 degrees and that was for two revolutions, being at that distance we missed the Earth—The time before we didn't see it. And the time was 3 minutes and 50 seconds.