Re: [PSUBS-MAILIST] my optronic mast idea with sketch

[Jon Wallace <jonw@psubs.org>]

Jens,

Comments are inline below

Jens Laland wrote:
> Would this mean that my own breathing (producing damp air) would not be
> held up by the air (in a cold environment), but rather condense itself
> asap on the nearest surface that is colder than itself, is that it?
>
> If this is correct, then the inside of a personal submarine operating in
> Norwegian waters would be a rather cold experience combined with a
> constant condensation problem. What have I got myself involved in here?
>
>   

Yes.  I'm sure you've "seen your breath" on really cold days when you 
walked outside.  This is the moisture in your breath immediately 
condensing as it mixes with the air.  A surface for condensation isn't 
absolutely necessary since water vapor can attach to molecules of air 
directly, under certain conditions of temperature and dew-point.  This 
happens all the time in the form of clouds and fog.  To rest your fears 
regarding cold Norwegian waters, even that water is warmer than the 
conditions necessary to produce immediate condensation of the water 
vapor in your breath.  The inside of your submarine will never be colder 
than the temperature of the water it is immersed in.

> There is a possibility that I might have misunderstood what you've just
> said when I did built my CRT enclosure.
>   
No, it was I who misunderstood your test.  Thanks for the detailed 
explanation and you can disregard what I said about the environmental 
conditions.  I thought you were going to test the survival of an 
unprotected monitor in humid conditions.  Since you are isolating the 
monitor in an air-tight container and flushing the container with dry 
air, my previous comments do not apply.


Jon




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