Spacelog Apollo 8

Apollo 8, this is Houston. At 68:04, you are GO for LOI.

Okay. Apollo 8 is GO.

Apollo 8, Houston. You are riding the best one we can find around.

Say again.

You are riding the best bird we can find. Over.

Thank you.

The cryo's have been stirred, Houston.

Roger, Bill.

Apollo 8, Houston. We just saw an MC&W light.

We just tested the caution and warning.

Roger.

That's keeping alert.

Apollo 8, Houston. We're 42 minutes from LOS, and we caught another caution and warning light.

It was the high-gain antenna going out of limits.

Apollo 8, Houston. Voice quality on the DSE dump is very good. The DSE is yours. Over.

Apollo 8, Houston. COMM check.

Read you loud and clear, Houston.

Houston, Apollo 8. Over.

Apollo 8, Houston. Go.

Roger. We are ready to activate the primary water boiler.

Roger. Copy.

We got a GO?

Roger. GO.

Okay. Steam pressure going to AUTO; H₂ flow going to AUTO.

Apollo 8, Houston. We are on low bit rate. We won't see your steam pressure; your RAD OUT is 33. Over.

Roger. We're below the boiling limit, and steam pressure is steady at 0.15.

Roger.

Apollo 8, this is Houston. We have got our lunar map up and ready to go.

Houston, Apollo 8. Over.

Apollo 8, Houston. Go.

Roger. We're showing a fuel pressure of 167, in AUX of 163. Wondering, do you think there's a possibility of us having a transient caution warning trip on fuel AUX pressure at the beginning of the burn that would correct itself nominally as we had a chance to pressurize? Over.

Roger. Understand; will check. Stand by.

Roger.

Apollo 8, Houston.

Go ahead.

Apollo 8, this is Houston. We've been reading fuel 173, AUX 167, holding steady for a long period of time. We expect no caution and warning trip. Over.

Apollo 8, Houston. Over.

Apollo 8, Houston. Over.

Apollo 8, Apollo 8, this is Houston, Houston. Over.

Roger, Houston. We read you loud and clear. How do you read us?

Apollo 8, this is Houston. Reading you loud and clear now. And verify your evaporator water control panel switch to the AUTO position. Over.

Roger. I am sure it is in AUTO.

Roger.

Burn status report as follows: burn on time, burn time 4 minutes 6-1/2 seconds, VG_X minus 1.4, attitude is nominal, no trim, VG_Y was zero, VG_Z was plus 0.2, DELTA-V_C was minus 20.2, orbit 169.1 by 60.5.

Apollo 8, Houston. Roger. The burn on time, burn time of 4:06.5, VG_X is minus 1.4.

Apollo 8, Houston. Verify your EVAP water control on panel 382 is AUTO. Your EVAP OUT temperature is high. Over.

Roger. Standing by.

Houston, Apollo 8. Roger. Primary EVAP is AUTO, H₂ flow AUTO. Do you recommend activating the secondary water boiler?

Roger. Copy. Stand by.

Apollo 8, this is Houston. Reverify manual valve on panel 382, evaporator water control AUTOMATIC. Over.

Roger. Verified.

Apollo 8, this is Houston. Recommend you activate your secondary water evaporator.

Secondary EVAP coming on line.

Roger.

Apollo 8, Houston. Turn off your DSE, and we will go to high bit rate. Over.

Roger.

Apollo 8, this is Houston. And I will continue my readback of the burn status report. Copied VG_X zero, VG_Y zero, VG_Z 1.2, DELTA-V Charlie minus 20.2. Over.

Stand by; he's getting the chart out again.

DELTA-VG_Z was 0.2.

Roger. Understand; 0.2 on VG_Z.

Houston, this is Apollo 8. We are on malfunction 1 of 6, going through step 1 to step 2. Over.

Apollo 8, Houston. Roger. Copy.

Correction. That is to step 4.

Roger. Copy; to step 4.

Now to step 13.

Roger. Step 13.

Now to step 14.

Houston. Roger.

Looks like the boiler dried out somewhere along the line.

Roger, Bill.

Houston, this is Apollo 8. I would like to confirm that burn status report. VG_X was minus 1.4, VG_Y 0. VG_Z 0.2, minus 0.2 that is. DELTA-V_C was minus 20.2 -

Apollo 8, —

— apogee 169.1, perigee 60.5.

Apollo 8, this is Houston. Roger. I will read back again. The burn was on time, 4 minutes and 6-1/2 seconds, VG_X minus 1.4, trim nominal, VG_Y zero, VG_Z minus 0.2, DELTA-V Charlie minus 20.2. Over.

That's Roger.

Roger. And we copy your apogee and perigee.