"Clark" stillnospam@me wrote in message
...
"Terrell Miller" wrote in
:

"Clark" stillnospam@me wrote in message
...

do you really want the person working the robot arm to be the same
person that worked themselves to the brink of exchaustion theprevious
day doing an 8-hour EVA?

Hmmm, "brink of exhaustion"? maybe, maybe not.

Try "definitely". And try reading about how easy it is to do work in a
pressurized spacesuit. Example: the glove tips pinch your fingers so
tight that your fingernails can turn black from all the blood pooling
behind them.

I'll stand by my maybe. Please demonstrate that *every* EVA resulted in
exhausted personnel. There is a huge difference between tired and hurting
and
exhausted, medically speaking. Hint, exhausted people don't repeat the
cycle
in two days.

Pretty much every Hubble EVA has resulted in extremely tired people.

Keep in mind just how hard it is to do things. Every time you bend your
arms you're pressing against the pressure in your suit. Every time you're
closing your hands is far tougher than just wearing a pair of thick ski
gloves.

Even just standing upright is surprising tired since you have to use muscles
in oposition to keep your torso where you want (since you don't have gravity
to pull you down.)

Every time you pull on something, you'd better be prepared to push on
something else else Newton's Laws exact their due.

As Terrell said, blackened fingernails is pretty common, on the first day of
flight. It goes downhill from there.

And remember too, tired folks make more mistakes. Do you want tired folks
doing your work?