Preliminary Gemini 4 Crew Debriefing, Part II, 1965

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McDivitt
White
never had to come off it again.
We didn ' t get
any abnormal operation of the radiator at any time .
One time they called up to me and mentioned some­
thing about the radiator and the coolant loop and
I didn ' t get any clarification.
I lost contact
at that time, and I thought just maybe that I
had a failure of some type in my primary cooling
system.
So just for caution sake I turned on the
secondary coolant pump and waited till I got con­
tact with them again. They asked me why I had the
secondary pump on, and I said, "I thought maybe
I had a problem in the primary system." They
asked me why I thought that and I said, "I thought
they were telling me something about it when I
lost contact with them.
I did it just to be sure ."
But that was the only time that I thought we even
might have had a problem in it , and I turned it
off.
We used double coolant loop early in the
mission,and after we turned the secondary system
off we did not use it a.gain until the teentry.
Prior to the reentry, we turned it on.
That's right .
That coolant system real ly worked.
Okay, here is one at which we'll get at them-­