Spacelog Apollo 13

That's affirm. And I'm going to take out roll first to get it zero and then I'm going to take care of pitch.

Okay.

Okay. GUIDANCE CONTROL, PGNS; MODE CONTROL to ATT HOLD. VERB 73 clears. Okay. We've got to get that out. … it stopped moving.

Here we go.

… the battery. …

Do you know what the plus-X thrusters are?

Yes, okay. I just wanted to make sure you do. I got them over here.

Aquarius, Houston. Over.

Go ahead.

Okay. A couple of things, Jim. One is that you can use the TTCAs to maneuver, but you're going to save a lot of fuel if you'd try MINIMUM IMPULSE. So, that might be a better recommendation. The other thing is, we'd like to give you a GO before you disable the plus-X thrusters, and before you do a VERB 76, and MODE CONTROL to ATT HOLD. Over.

Okay; understand. You want a GO before I—I'm—Of course, I just did a 76, and the MODE CONTROL is in ATT HOLD, at this time. But, this is later on down.

Yes. All we wanted to do was take a look at things before you disabled the plus-X thrusters, and before you go to MIN IMPULSE at the end there—that VERB 76, ENTER; MODE CONTROL, ATT HOLD.

Roger. Understand. And I'm maneuvering my roll now to zero.

Roger.

Yes. Those are the plus-X, right?

Houston, Aquarius

Go ahead, Aquarius.

Ah -

Go ahead.

In what fashion did you want us to disable those plus-X thrusters? Just pulling those appropriate TCA breakers, or did you want to actually go in and mask those jets?

Okay, Fred. We didn't explain that. The VERB 25, NOUN 07, ENTER sequence does that.

Okay. I didn't read the whole procedure. Jim just mentioned he wanted to disable plus-X.

I just did.

Okay.

And, Vance, are you still trying to get me an answer on that—pulling that ASA breaker?

That's affirm, Fred. This—The word here is, pull it.

Okay. Sure didn't get much work out of the AGS this time.

It's going slightly.

So is this one.

Yes. You got a ways to go in pitch.

Yes.

… 80.

You want to rest a little bit?

What time is it, 9:30? Yes. I got about what? I think I got about 10.

We're now in the hands of tracking.

Yes. It looks different than before.

Hard to do P37s in the LM. Hard to do a P37 in the LM.

Well, you can see where —

Roger. Copy, Jim.

Even after our free-return midcourse yesterday.

Okay. We copy that.

No matter what I do, I can't stop that. Roll either way won't do it.

Jim?

Well, I don't see any way around it, Jim. It sure doesn't seem to be doing much, does it? It won't go down.

I don't know. I wonder if they tried that in the simulator. I can't seem to get roll to go up. It goes down on me, no matter how I hit the controllers.

Got pitch zero.

You can really see a change in rate?

… jar here, see if it'll couple in roll.

No?

There we go.

That does it.

I'm glad, too.

I don't know what caused it.

Here we still have 67-percent fuel level. I wonder how come they didn't … DELTA-V curve?

Aquarius, Houston.

Go ahead.

Jim, we don't have any data on your movements right now. How does it look like this procedure's going to work out so far as getting an attitude set up, the first part of the procedure?

Well, Vance, I've been trying to use MINIMUM IMPULSE only attitude control to get my roll and yaw—the roll and pitch, rather. But, with the attitude control only in this configuration, I—I can't command these—the roll the way I want to. So, I had to go to TTCA to get my roll to build up towards zero, it was going—decreasing towards 270. I really don't know what the combination is in the attitude control, that you can get the control to pitch and roll the way you want it to. You've got to use the TTCA.

Roger. Copy.

I now have both pitch and yaw—or pitch and roll going toward the designated amounts, now passing through 23 degrees in pitch, and I'm going up past 321 degrees in roll. And I am letting go that direction and when I get there, 90 in pitch and zero in roll, I'll go to AUTO and damp the rates.

Get a little sleep? That's okay.

We've got to rig up a method of using those lithium hydroxide canisters.

Okay, Houston. We just got a MASTER ALARM and an ECS light. I take it the partial pressure CO₂ is—Yes—That's what tripped it.

There's that mother.

Aquarius, Houston. Say again.

All right. CO₂. Our CO₂ value is getting high. We had a DPS ECS light and a blinking component light.

Okay. Copy.

Stand by on that PTC O₂.

Say again, Houston.

Hello, Houston. How do you read? Over.

Okay. Read you loud and clear now, Jim.

Okay. Did you hear what I just said about the ECS light and the blinking CO₂ component light?

Okay. We got that and—Stand by 1.

Okay.

Not much.

Jack, we might have to have you rig up this CO₂ rig they're talking about.

Go ahead. Houston. Over.

Oh! We've got a long ways to go.

Go ahead.

Okay, Jim. We're going to have to get back with you in a couple of minutes on whether or not we switch over at this time to your other canister. Second point, it might help in setting up this PTC if you concentrate on roll first, and get that going; and then work on pitch, when roll is established, and sort of take whatever yaw you get.

Okay. Vance, I tried that but when I start doing roll only I get pitch coupled in with it. But both of them rolling up toward this desired amount, though. I'm up to 46 and in pitch and 326 in roll.

Okay. Understand you've tried it.

Once I get roll zeroed, I don't think it'll be too bad.