Spacelog Apollo 13

Roger. Now stand by 1.

Okay. Hand me the eyepiece. I got Scorpio.

You have?

Yes. And Antares.

Where's the other one? I'll put it back in here.

Hello, Aquarius. Houston. On activation page 16, if you are ready. Over.

Okay. Stand by just 1, Charlie. Jim's going to fish around and see if he's got—he thinks he's got Scorpio. I'm the AOT now. Okay, Charlie, go ahead. I'm on 16 now.

Okay. Fred. On page 16, perform the “Docked DPS BURN (PGNS),” that entire sequence down—down through the end of the page, except cross out that “CSM Maneuver to Burn Attitude, then CMC—FREE.” Over.

Yes. I kind of deduced that one, Charlie. Page 16, “Docked DPS BURN (PGNS),” except we'll forget the CSM maneuver.

Okay. And you can forget the “APS Follow-up,” too. Okay, on page 17, perform all of the AGS entries and at 4 minutes, we got a change. First line, CB(16) INVERTER 3, CLOSE; line 2, scratch out “Select INVERTER 1.” At—proceeding on down the page, after “ATTITUDE MONITOR,” we'd like you to place the RATE SCALE to “25 degrees a second.” Okay, proceeding on down four more lines to “BALANCE COUPLE,” we'd like to turn “BALANCE COUPLE-OFF.” That's to keep the upfiring jets off of the CSM, in case we have to damp any rates in AGS, though we don't think we will. Then perform the rest of that page as written. Over.

Okay, on page 17. Do the AGS load at minus 4 minutes; it's CB(11), INVERTER 2, CLOSE, and scratch “Select INVERTER 1.” RATE SCALE changed to “25 degrees a second.” “BALANCE COUPLE,” we'll turn “OFF;” and, incidentally, on the AGS dampen rates point, it brings up the discussion we'd had before, Charlie, on takeovers. You might discuss what it's going to cost us DELTA-V-wise, if we get a control problem, to just shut her off and it take 30 minutes to regroup for a good manual burn.

Fred, we already got that story for you, pretty well in hand. We're reviewing it right now. And I'd like to defer that question until later on. Basically, we're just going to shut down and take what we got, and we got a midcourse of about—the maximum of 5 foot per second, anywhere in the burn to get back to free return. That—that's basically the story. We'll give you the mission rules for this burn momentarily. I'd like to proceed on to page 18, at minus 1 minute, scratch “MASTER ARM—ON.” Stand by.

Okay, on page 18, and I've already done that at 1 minute; “MASTER ARM—ON,” I'll scratch —

— Slipped that … and I won't have anything to do —

— I've already scratched “CB(16) ABORT STAGE—CLOSE” for the previous burn.

Okay. We want you to close the CB(16) ABORT STAGE. Over.

Okay. You got some special reason for that?

Yes, sir. We like—In case we don't get a manual ON—I mean, an AUTO ON, we're going to back up using the abort stage in the descent-engine command override at ignition plus 1 second. Backing up to page 17, at minus 4 minutes, you read “CB(11) INVERTER 2,” it should be “CB(16) INVERTER 2.” Over.

Okay, I got you, Charlie. 17, “CB(16) INVERTER 2, CLOSE.”

Okay, back to page 18. We'll continue on as is at 30 seconds, 10 seconds, 7 seconds, minus 5 seconds. At “ignition,” no ignition and we'll add here, “no ignition, START pushbutton—push; still no ignition, DESCENT ENGINE COMMAND OVERRIDE, ON.” Over.

I got it out there, but I can't get to see it closer.

Okay, on channel—on page 18, right on down the line, everything holds until after “ignition”; “if no ignition, START pushbutton—push; still no ignition, DESCENT ENGINE COMMAND OVERRIDE switch ON.”

Okay, good readback, Fred-o. At plus 15 seconds, scratch “MASTER ARM—OFF;” and at—proceeding on down to “At Engine Cutoff,” it's—after the “MODE CONTROL: PGNS to ATT HOLD,” we'd like a “VERB 76,” and the “Damp Excessive Rates Via the LM Y, Z Translation.” Over.

Okay, scratch “MASTER ARM—OFF” at plus 15, and “At Engine Cutoff” after “MODE CONTROL: PGNS—ATT HOLD,” we want a “VERB 76 ENTER,” and “Damp Excessive rates Via LM Y, Z translation.” And a question on the—propellant quantity, we expect it to get down below 37 percent on this burn. Does that compare with that burn time when you get down to it.

That's negative. At this—this burn, we're looking at—not reaching 37 percent, so I don't think we'll have to perform that step. We will verify that for you. Okay. One other statement: “At Engine Cutoff, if manual start, then at 30 feet per second to go, throttle to 40 percent. At DELTA-V equals zero, stop pushbutton, push.” Over.

Okay, Charlie. If a manual start, that was throttle to 40 percent at—Was that 30 foot per second to go?

That's affirmative. At 30 foot per second to go.

Okay. Then it's stop pushbutton at VGO equals zero?

That's affirmative. What we want to do, if we got a manual start, we're going to have to shut down manually, and, to get a better guided cut-off at 30 foot per second to go, we want you to throttle at 40 and acceleration is within reason there, and we feel like we can get a good manual cut-off. Over.

Okay.

Okay. Now, Fred, that was good in the checklist. That's all. We'll have the powerdown checklist for you momentarily, and we'd like to ask you if you plan to use the DPS burn card. If you do, we have some changes to that. Over.

Okay. Let me get ahold of this … right now.

Let me know when you are ready to copy. Over.

I'm ready.

Okay. The first two lines are okay. CB—third line, CB(11) and (16): STAB/CONTROL, all CLOSED except CB(11) AEA, OPEN; ABORT STAGE, OPEN; AELD, OPEN. CB(16) AELD, OPEN. Over.

Okay, on the DPS burn card, third line should read CB(11) and (16): STAB/CONTROL CBs all CLOSED, except CB(11) AEA, OPEN; ABORT STAGE, OPEN; AELD, OPEN; CB (16) AELD, OPEN.

Okay. Good readback. Proceeding on down the page. “BALANCE COUPLE” switch, “BALANCE COUPLE OFF.” Okay, down to the TTCA—it's the last line before minus 2 minutes—“TTCA COMMANDER THROTTLE, MINIMUM; LMP TTCA to JETS.” At minus 2 minutes, scratch “400 plus 1.” At minus 1 minute, scratch “MASTER ARM, ON.” At minus 10 seconds, add “MANUAL ULLAGE.” At plus 5 seconds, scratch “DESCENT ENGINE COMMAND OVERRIDE, ON;” add “TTCA, 40 percent.” Okay, the same comments apply about the manual start: “At the ignition time, if no start, manual START pushbutton, push; if still no start, DESCENT ENGINE COMMAND OVERRIDE, ON.” And the same comments apply to shutting down at manual start. Over.

Okay. The same comments. I'll start at the top again here. Okay. “BALANCE COUPLE” should be changed to “OFF.” Under TTCA, it should be “LMP TTCA” to “JET.” Scratch “400 plus 1” at minus 2; scratch “MASTER ARM, ON” at minus 1. Add at minus 10 seconds “MANUAL ULLAGE”; add ignition—can add the comment about “If no start, START pushbutton, push; still no start, DESCENT ENGINE COMMAND OVERRIDE, ON.” At the plus 5-second point, scratch “DESCENT ENGINE COMMAND OVERRIDE, ON,” and add “TTCA to 40 percent,” and the same comment applies at engine stop to perform.

We really don't use this card at that time.

Roger, Fred-o. Now we aren't—also at minus 30 seconds, we aren't looking at an AGS burn so you can scratch “ABORT pushbutton, push,” and at DELTA-V equal to zero, scratch “ABORT pushbutton, reset.” Over.

Okay. Minus 30 for AGS burn, “ABORT pushbutton, push” is scratched, and at DELTA-V equals zero, “ABORT pushbutton, reset” is scratched.

Okay, you got it, babe. We'll have some mission rules for you momentarily, and the powerdown checklist and also a PTC setup. Over.

Okay.

Houston, Aquarius.

Go ahead, Jim. Over.

Roger. Be advised I'm now seeing Antares and Nunki in the AOT, and I just wanted to know whether you want me to try to do a P52.

Roger. Stand by. We copy the stars you are seeing. Stand by on a P52.

Not very far apart. Put the card back up, Jim —

Okay, okay, let's go back to that P52 … now the attitude.

The burn attitude?

Yes. I want to make sure I got it.

Oh, you strayed off?

Yes.

Okay. … Okay. You want these numbers? Or do you want the numbers from these.

What?

Pads. You got the G&N dictionary?

I got 13 20 going now.

Wait a minute.

… Just a … These are those 13 20 angles here. Up here. Right here.

Hey, great.

One on. And Houston, Aquarius.

Go ahead, Fred.

Oh, about how long we got before we're going to have to go to work here, Vance. Kind of like to get a bite to eat, maybe.

Okay. We have a—a couple of pads to give you and stand by. Let's—we'll check to see if we have anything else.

Hold on to that, baby. Where's that G&N book? You got it over there?

Here we go. Here, you want me to start copying —

— … the bag —

— off there.

Aquarius, Houston.

No, you've got it right here.

Go ahead.

Okay. About all we have to do is to send up your state vectors and target loads, and that will have to wait a couple of minutes until we get ready to do so. And if you're ready to copy, I can give you the P30 maneuver pad for PC plus 2, and after that, probably you should eat and then we'll regroup again to send up other things. Over.

Okay. I'm ready to copy a P30, a PC plus 2.

Okay. PC plus 2. 079:27:40.07; plus 0819.2, minus 0020.0, minus 0218.9; NA; plus 0020.9, 0848.2; 420, 274, 082; plus 0820.3, minus 0020.0, minus 0215.0; the rest N/A. Under remarks: ullage, two jets 10 seconds; CSM weight 62480; LM weight 33576. DPS throttle profile: 5 seconds at idle; 21 seconds at 40 percent; remainder at MAX.

Roger; that's correct, Fred. If you'll take out a maneuver pad, I'll give you some landing information. Over.

Okay, you're talking in the CSM update book?

Yes, that's affirm.

You got it right here. Make sure and scratch the … —

… —

— though.

Okay, which—which one we want? P37?

What kind of a maneuver pad do you want, Vance?

This is a CSM maneuver pad for—to monitor PC plus 2. And it's going to be mainly blank except I want to give you your NOUN 61 latitude and longitude range to go for the EMS and that sort of thing.

Okay, go ahead.

Okay, at the top, purpose is monitor PC plus 2; everything is blank until you get down to NOUN 61. Latitude as follows: minus 21.47, minus 165.00; 1166.0, 36291, 142:39:20. Over.

Okay, monitor PC plus 2 pad. NOUN 81: minus 21.47, minus 165.00; 1166.0, 36291, 142:39:20.

Roger; that's correct, Fred-o. And we—now would like to get you in a configuration to uplink your state vector and target load. So, if you're ready to copy, I have some circuit breaker changes for you. Over.

Okay, go ahead.

Okay, circuit breaker panel 11 UPDATA LINK, CLOSE; PRIMARY POWER AMPL, panel 16, CLOSE; VOICE FUNCTION to VOICE; RANGE—RANGING FUNCTION to RANGING; TM bit rate, HI; and then P00 and DATA.

Okay, we're now in P00 and DATA, and switches and breakers are configured. You got it.