----- Original Message -----
Sent: Friday, January 13, 2006 10:10
PM
Subject: Re: [PSUBS-MAILIST] Life Support
(O2)
Hi Rick.
My question is.....
You said the only sources of humidity in your
boat will be from your body perspiration and your latte cup.
Your boat is an ambient sub, so that means it is
always open to the water with air pressure keeping the liquid water
out.
Even though the air pressure keeps out the water
liquid, wouldn't the water vapour molecules still enter the boat
and condense back into droplets obscuring your
canopy? Wouldn't that mean that there is just about no way
you can stop moisture from entering your boat because of its very design as an open to
the water ambient sub?
A suggestion of mine.....
Since it appears to me that there is no way
someone could keep water vapour out of an ambient sub because of
it
always being open to the water, then why not use
water to keep the canopy clear? Here's what I mean....
We have all taken a garden hose to our car
windows on mornings when they were all covered with water dew and
washed them off so we could see. Why not do
something like that in an ambient sub? Like this....have a channel
around the bottom of your acrylic canopy that
catches the water and then a small fish aquarium pump that would
pump the water from the channel back up thru
small hoses that would squirt a fine spray onto the upper area of
your canopy just enough so the water would
collect and run down keeping the view clear but without water
dropping
vertically straight down. In other words the
water would flow down the inside of the curved canopy without
falling
off it vertically onto the floor. You could run
this constantly and just look thru a thin even film of water running
down
your canopy, or you could wait until the
canopy was getting fogged up and then pop the switch for a few seconds
to
run the water and clean the canopy off.
Kind of like a very thin controlled water
fall over your canopy's inside surface.
This would keep the water droplets from forming
and obscuring your view by rinsing them off either constantly or
intermittently.
I also wonder if it would help this type of
system to polish the inside canopy with wax, or it that would make the water
release easier from the canopy's inside
curved surface and drop to the floor.
Does this sound easier than a towel and defog or
is this a crazy idea?
Bill Akins.
----- Original Message -----
Sent: Friday, January 13, 2006 2:27
PM
Subject: Re: [PSUBS-MAILIST] Life
Support (O2)
Harry -
Medical oxygen is bone dry. O2 in the
lines will accelerate oxidation (rusting) if humidity is
present.
I may install a dehumidifier in Magical
Child. In the long run, the idea of rubbing anti-fog all over my
canopy doesn't really appeal to me.
Because my sub will be an ambient, one way I'll
be reducing humidity in the cockpit is by venting my breathing exhaust
directly out of the cabin. Perspiration and water vapour from my latte
(seriously) will be the only sources of humidity in the
boat.
Initially a towel and anti-fog will
do.
Hope this helps.
Rick L