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  Mercury - Gemini - Apollo
  Problems with Apollo A7L helmet visors fogging

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Author Topic:   Problems with Apollo A7L helmet visors fogging
Tykeanaut
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Posts: 1722
From: Worcestershire, England, UK.
Registered: Apr 2008

posted 11-02-2013 11:06 AM     Click Here to See the Profile for Tykeanaut   Click Here to Email Tykeanaut     Edit/Delete Message   Reply w/Quote
I recently heard an extract from Chris Hadfield's new book. It recounted how he had trouble with his eyes due to not removing enough of the cleaning fluid from his visor that prevents fogging.

Was this ever an issue with other flights, especially the moon landings?

Rick Mulheirn
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Posts: 2521
From: England
Registered: Feb 2001

posted 11-02-2013 03:03 PM     Click Here to See the Profile for Rick Mulheirn   Click Here to Email Rick Mulheirn     Edit/Delete Message   Reply w/Quote
The design of the helmets is such that air is directed across the inside surface of the visor to prevent misting. That is why on occassion I have seen footage of the visor misting momentarily as the astronauts speak and then clear almost immediately.

That said, I am sure on a particulary arduos EVA it could become an issue.

All times are CT (US)

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