Apollo Command Module CO2 Scrubber

3 responses to “Apollo Command Module CO2 Scrubber”

1. 

   jurvetson

   Apr 14, 2020 at 3:59 am

   and the complex interlock, showing the lower filter box:Diagrams, with and without cover, from NASA"The canisters have removable lithium hydroxide ele- ments. The elements are alternately changed, one every 12 hours. The elements absorb carbon dioxide and also contain activated charcoal, which absorbs odors."

   The mechanical interlock assures that one canister is in operation as the other is replaced. Here is what one of the canisters looks like (there is one in the A and B pod), detailNASA flight photo of Jack Swigert handing over a hose assembly in the CM Odyssey, signed "The temporary hose connection and apparatus that saved us! Fred Haise, Apollo 13 LMP."As jerry-rigged in the Apollo 13 LM (square box for a round hole). Note the torn strips of duct table running at right angles and plugging the center: P.S. I had a incredible experience once training on the use of similar scrubbers with astronaut Scott Parazynski in a submarineAnd the the subject of a huge painting by Pilat

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2. 

   sbove

   Apr 14, 2020 at 11:06 pm

   Just because the origin of this pair of phrases is debatable and annoying…

   "Jury-rigged means something was assembled quickly with the materials on hand. Jerry-built means it was cheaply or poorly built. Jerry-rigged is a variant of jury-rigged, and it may have been influenced by jerry-built. While some people consider it to be an incorrect version of jury-rigged, it’s widely used, especially in everyday speech.

   What does jury-rigged mean?…/in the nautical world, jury means “makeshift” or “temporary.” The origin of this jury isn’t exactly known.

   The word rig is also a nautical term. As a verb, it means “to fit a ship or mast with the necessary elements (such as shrouds and sails).” More generally, it means “to assemble.” Together, these words become jury-rigged by the late 18th century.

   A jury-rig, as a noun, is a temporary solution that’s built to replace something that’s been broken or lost overboard. The word can also be used as a verb. For example: “She jury-rigged a new topmast after hers broke in the wind.” Although this expression is rooted in the nautical world, it can refer to any makeshift, MacGyver-like fix: “He jury-rigged a raincoat from garbage bag in the garage.”

   What does jerry-built mean?
   Jerry-built is an adjective. It describes something that’s cheaply or flimsily built. It can also mean “developed in a haphazard way.” The word can also be used as a verb (present form, jerry-build): “He jerry-built the house, and now, the roof is leaking.”

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3. 

   jurvetson

   Apr 15, 2020 at 12:00 am

   So Jerry-rigged = Jury-rigged and "can refer to any makeshift, MacGyver-like fix". Sounds like anything involving duct tape should qualify 😉

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