Because the LM cabin was small and weight margins for the return to
lunar orbit were tight, jettison bags were used to keep the cabin free
of trash, such as food wrappers and urine bags, and of equipment that
was no longer
as the hammocks after the last rest period. Generally, one full
jettison bag was taken outside at the
beginning of each EVA. Once the Commander (CDR) was out
on the porch, the Lunar Module Pilot pushed the jett bag into
reach with his foot. The CDR then dropped it over the side
railing and, later, kicked it under the LM descent stage. On each
Apollo 11, an additional jett bag was filled prior to PLSS jettison and
went out the hatch with the backpacks. Jett bags were also
used in the Command Module.
On the J missions (Apollos 15, 16, and 17), the astronauts each stepped into a jett bag at the end of each EVA to encase the suit legs and surpress dust during the rest periods. They also stood on jett bags during suit donning and doffing the keep their feet out of the dust that covered the floor.
An empty jettison bag, lying flat, is about 101 cm long and 70 cm wide (see below) and weighs 380 grams. In the cramped LM cabin, a full jettison bag had to be carefully placed out of the CDR's way as he got to his knees and then on his hands as he backed out through the hatch.
This detail from AS11-4-5850
- the first picture Neil Armstrong took during the Apollo 11 EVA -
shows a jettison bag under Eagle's descent stage.
Click on the image for a link to the full image.
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Christian Lotzmann displays an unflown Apollo jettison bag.
In August 2007 when the picture was taken, Chris was 138 cm tall.
When lying flat, the empty bag is approximately 101 cm long and 70 cm wide.
Click on the image for a larger version.