Here is another NASA replica that I worked on based off an old file I had that is no longer available. This is a replica designed to be a 1:1 prop of the Lithium Hydroxide filter that the Apollo 13 astronauts had to put together with only parts on board in order to survive.

There are a few profiles here depending on how you want to build it:

• FLAT COVER BASE- This has the main base with the front filter that will be flat. The back is left open so you can easily add the cardstock and bag with more ease.
• MAIN BODY ONLY- Just the shell of the main body, both ends opened you will need to print the raised front version as well.
• Screen- This is the screen portion of the filter, this will need to be printed regardless of the other variations that you do. If you use a light brown PLA, you will get a used effect on the screen.

**BE SURE TO SELECT DOWNLOAD STL IF YOU CANNOT USE .3MF FILES**

FOR PERSONAL/EDUCATIONAL USE

During the Apollo 13 mission, an explosion in the Service Module forced the astronauts to shut down the Command Module and use the Lunar Module as a "lifeboat" while the spacecraft looped the moon and returned for an emergency reentry into the Earth's atmosphere. As the astronauts settled in the LM there was a gradual build-up of carbon dioxide gas. The environmental system in the LM depended on two lithium hydroxide (LiOH) filters to remove excess carbon dioxide (exhaled by humans as part of normal respiration) from the atmosphere. But with three astronauts to support instead of two, the filters did not have enough capacity to maintain safe carbon dioxide levels for the entire journey home. The CM environmental system had many unused LiOH filters that might be transferred to the LM. But the filters used in the CM were box-shaped and fit into box-shaped holders; those in the Lunar Module were cylindrical and fit into cylindrical holders. The engineers with the Mission Control team worked out a solution that cobbled together plastic bags, plastic coated cue cards from a three-ring reference binder, hoses from the lunar spacesuits, and lots of grey duct tape, then carefully radioed instructions to the astronauts in space. After about an hour, the new device, although not very elegant, worked perfectly.

Check out our other space related prints, just click on the pic:

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