Yep:
The thermal conductivity of CO2 at the temperatures expected in flight is on
order of 0.01 W/mK, which provides conductive insulation of interior components
from the fuselage. All of the gas gaps are large enough to take advantage of
conductive isolation without being so large as to introduce convection, which
starts to occur at gap widths of 6 or 7 cm (Ref. 6)
Another site refers to the gas gaps as bing “dark mirror kapton film skin
technology”
Good paper on it:
https://pdfs.semanticscholar.org/3476/ff87ee474d8d58d5aa1528e8d7209cafdb8b.pdf
-----Original Message-----
From: Chuck McCown via AF
Sent: Saturday, February 20, 2021 12:22 PM
To: af@af.afmug.com
Cc: Chuck McCown
Subject: Re: [AFMUG] OT Helicopter on Mars
Since the atmospheric pressure is so low the CO2 pressure would also be very
low. A mylar bag could be the CO2 insulating space.
-----Original Message-----
From: Chuck McCown via AF
Sent: Saturday, February 20, 2021 12:20 PM
To: af@af.afmug.com
Cc: Chuck McCown
Subject: Re: [AFMUG] OT Helicopter on Mars
Yes, but it would have to be contained in a shell to keep convection
currents from allowing the heat to escape. Aerogel would not need a shell.
Just pumping a box full of CO2 will do little to keep heat from transferring
to the outer wall. Dead air spaces have been used for centuries for
insulation.
-----Original Message-----
From: Robert
Sent: Saturday, February 20, 2021 12:04 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT Helicopter on Mars
_for the weight_
On 2/20/21 10:36 AM, Chuck McCown via AF wrote:
> Interesting, CO2 is a better insulator than aerogel. Not totally sure I
> understood that.
>
> -----Original Message----- From: Matt
> Sent: Saturday, February 20, 2021 11:25 AM
> To: AnimalFarm Microwave Users Group
> Subject: Re: [AFMUG] OT Helicopter on Mars
>
> https://www.youtube.com/watch?v=GhsZUZmJvaM
>
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