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CONFIDENTIAL
101:51:56
CC
Roger.
101:52:08
CC
The Quantity Read switch to the FUEL CELL O₂ position.
101:52:12
C
FUEL CELL O₂.
101:52:13
CC
Roger. We've got some data for the Command Pilot, if he would like to listen.
101:52:18
C
Go ahead.
101:52:19
CC
Okay. The fuel cell status. Stack times have been balanced within .5 to .75 amps for the mission with the exception of 2-Charlie. Charlie has been a hot stack both prelaunch and flight. A plot of percent total load sharing versus time shows the following figures: Prelaunch, 18.6 percent; 20 hours, 20.0 percent. Quantity Read to the FUEL CELL H₂ position, please. 40 hours, 20.0 percent; 60 hours, 20.0 percent; 80 hours, 21.0 percent; 100 hours, 20.5 percent. Data indicates load sharing has not changed deprecably since lift-off. Looks like we have a good stable fuel cell system. The G-Stacks normally share a larger percent of load since the coolant fluid is higher in these stacks. Over.
101:53:55
C
Roger. Thank you very much.
101:53:57
CC
Roger.
101:54:13
CC
Quantity Read switch off, please.
101:54:15
C
Quantity Read off. Understand you want me to monitor H₂ and keep above 310 tonight.
101:54:30
CC
What we'd like you to do is - you don't have to monitor it, you - it shouldn't drop any lower than that point.
101:54:38
C
Okay. If it does, you all give us a call, will you?
101:54:40
CC
That's affirmative. People on the ground will watch it for you.
CONFIDENTIAL