Spacelog Apollo 13

Go ahead.

Jim, we have some status information for you, if you're ready to copy on a piece of scratch paper.

Stand by, Vance.

Okay.

We're ready for you.

Put that away and get some status paper here.

Go ahead, Vance.

Okay. First, midcourse correction will probably be at GET 104 hours, and all we look for is a 4- to 6-feet-per-second DELTA-V. Okay. That's the first item. Now, I will give you a rundown on consumables. Okay. In the LM, you have 1498—that is 1 4 9 8 amp-hours remaining. That means over 61 hours you'd—That would average out to 24.5 amps. We expect that, after powerdown, that you will use 1 4 or 14 amps per hour, and that would leave a reserve of 500 amp-hours at the end of the mission. Are you with me?

Roger. We're with you.

I saved my—number was yesterday.

Okay. In the LM, you have —

We're with you.

Roger. In the LM, you have 215, that is 2 1 5, pounds of water, usable. That would average out over 61 hours to 3.5 pounds per hour available. Okay.

Okay. And after you power down, we expect that you will be using water at the rate of 3.2 to 2.7 pounds—That's at 14 amps per hour electrical usage rate. One note, this does not—When we speak here of water available, this does not include CSM water and PLSS water, so that's add on. Okay, next, LiOH. Using the CSM cans, you will have 16 cans at 12 hours per can to give you 1 9 2, or 192 hours, of LiOH. And, in the LM, using its cans, you have 44 hours remaining.

Vance, is that with the PLSS secondaries?

That's affirm. That's affirm. That includes PLSS secondaries.

Okay; oxygen. You have remaining 44 pounds in the LM. At a usage rate of 0.36 pounds per hour, that leaves you 120, or 1 2 0, hours of oxygen. Okay. Next, RCS. RCS A stands at 6 2 percent and B at 6 2 percent. We only expect 2 percent to be used for the PTC, so you're in good shape for RCS. Next, DPS DELTA-V. You have 1190 feet per second remaining. And, finally, CSM EPS. We estimate that you have 99 amp-hours. That's an estimate. And that's it. Over.

Okay. I copy.

Okay. And just a question. It would be interesting to hear from Jack to see if he thinks that main B bus is good. If he has any idea of how, if whether it's good or not, this would influence our steps in the future; for example, we might want to try to test main B to see if it is, in fact, good so that we'd know how to set switches for entry.

Roger. Just a minute. They want to know whether you think main bus B is any good for the command module.

Vance, while Jack's got on the loop, let me pose the question of how we're planning on doing this midcourse, if we are going to power down the PGNS.

Would you stand by on that, Jim? We'd like to give you a procedure for that later on.

Okay. Got a midcourse at 104 hours, he's going to give us a procedure for that later on.

In short, Jim, we don't expect any problem, but we'll explain further later on.

Okay.

Deke says get a night's sleep. He says you've been working hard, and you ought to relax a little bit and be ready for tomorrow.

Vance, this is Jack.

Go ahead, Jack.

Okay. Let me give you my observations on main bus B. Things happened pretty fast there, and we first heard the impact or explosion or whatever caused it, I'm not sure. The next—About 1 second later, there was a MASTER ALARM which was the MAIN BUS B UNDERVOLT. I looked at the voltage, and the voltage was good at this time so I'm suspecting it was a spike. Fuel cell 3 was also good, with good flow. However, Fred, at that point, was coming into the command module and got over into his seat. At that time, we shortly had an AC BUS 2 light about the time he got into his seat. He looked at the MAIN BUS B and the MAIN BUS B was reading ZERO. It, however,—and the fuel cell flows were ZERO. I'm kind of suspecting that perhaps we do have a MAIN—a current MAIN BUS B. But that's merely a guess. I never did try to reset it. We were having other problems with the MAIN BUS A, having an UNDERVOLT and a few other things like that. I'd kind of like to hear what your feelings are down there.

Well, Jack, we copy your information. And we'd like to hold off because we're still working the problem. So we'll have to give you information later.

Thank you.

Aquarius, request AFT OMNI.

Vance, are you back with me?

Roger. We're with you.

Okay. We lost lock there. We switched OMNIs. Just for my own—kind of to get my thoughts in order, I'd kind of hear what—I'd like to hear what kind of entry you're planning. EMS or PGNS or what ?

Okay. PGNS entry is being planned, and people are at work on checklist changes and that sort of thing.

Okay. Real fine.

And—we'll—We'll give you the CSM stuff tomorrow, but basically we expect that main bus B is good and we're going to work up a procedure to test it.

Okay. Those are my thoughts, too.

But —

You think main bus B is good, don't you?

We ought to use that oxygen up and not waste it. (Cough)

You monitoring right now?