+ 1970 News Releases (7.6 Mb PDF file) - NASA

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and water flow for the liquid cooling garment -- a suit of knitted long
underwear with thin tubing woven in the torso and limbs. The tubes carry
water from a reservoir in the PLSS_ and the circulating water serves to
carry the astronaut's metabolic heat to a heat exchanger in the PLSS.
If the oxygen system in the PLSS fails_ emergency oxygen is supplied
by a small oxygen tank atop the PLSS. Before the buddy secondary life
support system was devised, the emergency tank was required to furnish
not only suit pressure sad breathing oxygen_ but also cooling through
a high oxygen flow rate. Tee buddy secondary life support system by
sharing the water supply between two crevrmen, stretches the time the
emergency oxygen will last from about 40 minutes to 1 to 1_ hours.
"On the Lunar surface_ "Apollo 14 Lunar Module Pilot Edgar D. Mitchell
explained recently "one of the greatest problems of the work is dissipating
the metabolic heat that you build up. You don't want to build it up and
store it in the body_ and the buddy secondary life support system allows
us to tie these two cooling systems together and get a greater distance
from the lunar module than we could without it. Without the buddy system_
we have to use oxygen for cooling as well as breathing and that's a rather
inefficient way of doing i%."
The BSLSS hoses are eight and a half feet long_ but are prevented
from reaching their full length when connected from one PLSS to the other
by a four and a half foot tether. The tether snaps to the waist restraint
straps of both men's spacesuits_ cad would prevent damage to the water
hoses or to the spacesuits during the trek Deck to the Lunar Module.
Each man assists the other in making the connections,