Gemini 5 Technical Debriefing, Part II, 1965

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52
FCSD rep
Cooper
one time I noted the RCS Ring B was up to
80 degrees.
I watched i t quite closely for
a while and then it never went beyond
that and came on back down to about 70.
And they stayed there essentia.lly the whole
flight .
I think you need thoee heaters
on obviously the whole--all tt.e time--I'd
never have any of them off at all now.
Thruster firing colIDllents .
When the RCS
thrusters fire at night they clank out what­
ever you are l ooking at in the night side.
The only way you are going to use any night
attitude reference i s to watct. what you are
doing, get l~ned up in a reference and then
f i re a thruster and pl an on ws.iting a few
seconds before you can tel l wt.ere you are
at again.
They really light t ~ the place .
When you are firing them at night .
How far does the flame stick cut?
The plume goes out about-- appear s to go out
about 4 feet and the plume is j ust the width
of the outside diameter of tha.t thruster
as i t comes out --it has a little bit of ex­
pansion ratio as it comes out and it goes
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