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  Apollo A7L spacesuit layers: IVA vs. EVA

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Author Topic:   Apollo A7L spacesuit layers: IVA vs. EVA
Jim_Voce
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Posts: 273
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Registered: Jul 2016

posted 06-27-2018 07:36 AM     Click Here to See the Profile for Jim_Voce   Click Here to Email Jim_Voce     Edit/Delete Message   Reply w/Quote
The Apollo A7L suits configured for the command module pilots were described as IVA suits but as was demonstrated by Dave Scott on Apollo 9, could be exposed to the full vacuum of space for EVA purposes. However, the Apollo A7L suits used by the commander and lunar module pilot on lunar EVAs had additional fabric layering. So what was this additional layering for?

I understand that the lunar surface suits had shoulder joints and leg joints for mobility and that this feature was obviously not included or needed for the CMP suits. And also, the lunar surface suits had a separate liquid cooling garment. But these considerations aside, why were there additional fabric layers if the CMP suit could function for an extended period in the total vacuum of heat and cold of space?

Jim Behling
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Posts: 1463
From: Cape Canaveral, FL
Registered: Mar 2010

posted 06-27-2018 07:37 AM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
The extra layers were for thermal control and micrometeoroid protection. The CMP did not go completely out of the command module and it was a short EVA, until the J missions.

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