A very practical problem is windshield fogging. This happened on my boat one
cool evening this Fall, and after I realized it wasn't getting foggy
outside, I had my daughter up on the foredeck wiping the windows constantly
while I sponged them off inside - just so we could see. The amount of sudden
condensation was formidable. (Trojan 26.)

Is general pilothouse heating adequate for this? I suspect not. Anyone heat
their windshields, the way the "defrost" setting works in an automobile?

====

Charles T. Low
www.boatdocking.com

====

"Short Wave Sportfishing" wrote in message
...
The more I get into designing the new interior of this '68 Chris Craft
Corsair I want to turn into a winter boat, the more I get to wondering
about different things. One of which was brought home this morning as
I took the dogs out for exercise.

Having arthritis, cold isn't my friend. Adding to that, I don't enjoy
the cold all that much - never have. I tolerate it, but I don't like
it. Therefore, it is paramount in a winter boat to have....

HEAT.

My thought was to pull heat off the engine much like the radiator
system in a car. The way the design is developing, there will be an
interior cabin of a sort or at least a place where one could get out
of the wind, rain, etc. Think of a Parker/Steiger type pilot house
without the adjoining cuddy space. This is where I would put the
heating unit.

I'm just not sure this is a valid way of heating this small space.

Any thoughts?

Later,

Tom
-----------
"Angling may be said to be so
like the mathematics that it
can never be fully learnt..."

Izaak Walton "The Compleat Angler", 1653

Charles T. Low wrote:
A very practical problem is windshield fogging. This happened on my boat one
cool evening this Fall, and after I realized it wasn't getting foggy
outside, I had my daughter up on the foredeck wiping the windows constantly
while I sponged them off inside - just so we could see. The amount of sudden
condensation was formidable. (Trojan 26.)

Is general pilothouse heating adequate for this? I suspect not. Anyone heat
their windshields, the way the "defrost" setting works in an automobile?

====

Charles T. Low
www.boatdocking.com

====


Howdy, Charles,

I've never seen a window defogger setup on a boat. Automotive
defogger/defroster systems use heat plus run the A/C unit to remove the
moisture that is condensing. I recall having cars without air
conditioning and the heat only defogger was not as effective.

An exotic solution would be having your windows coated with transparent
but conductive coating such as Indium Tin Oxide and then pass current
through the coating to heat the windshield. Military and commercial
airplanes use this technique on many of the cockpit display panels and
windshields. Also, I wonder if there is an after market automotive thin
wire defroster that could be applied to the windows, similar to the
electric heater wires in the rear windows of most cars.

Eisboch

Another method used to heat aircraft windows is fine wire (30-50 micron
diameter). Some of the smaller planes use 24VDC heaters and simple
on-off controllers.
http://www.bekaert.com/corporate/pro...l%20fibres.htm is a
manufacturer of such wire in various alloys. Generally, the wires are
embedded into a urethane inner layer and connected to bus bars on
either side. They also put at least one temperature sensor in the
window. The currents can be quite large in order to get 2-3
watts/square inch. De-icing reqires 4-5w/sqin.

Andy Estes
www.estestech.com


Eisboch wrote:
Charles T. Low wrote:
A very practical problem is windshield fogging. This happened on my
boat one
cool evening this Fall, and after I realized it wasn't getting
foggy
outside, I had my daughter up on the foredeck wiping the windows
constantly
while I sponged them off inside - just so we could see. The amount
of sudden
condensation was formidable. (Trojan 26.)

Is general pilothouse heating adequate for this? I suspect not.
Anyone heat
their windshields, the way the "defrost" setting works in an
automobile?

====

Charles T. Low
www.boatdocking.com

====


Howdy, Charles,

I've never seen a window defogger setup on a boat. Automotive
defogger/defroster systems use heat plus run the A/C unit to remove
the
moisture that is condensing. I recall having cars without air
conditioning and the heat only defogger was not as effective.

An exotic solution would be having your windows coated with
transparent
but conductive coating such as Indium Tin Oxide and then pass current

through the coating to heat the windshield. Military and commercial
airplanes use this technique on many of the cockpit display panels
and
windshields. Also, I wonder if there is an after market automotive
thin
wire defroster that could be applied to the windows, similar to the
electric heater wires in the rear windows of most cars.

Eisboch

http://www.jcwhitney.com/autoparts/P...p-8718/c-10101



"Charles T. Low" [withoutUN] wrote in message wsgroups.com...
A very practical problem is windshield fogging. This happened on my boat one
cool evening this Fall, and after I realized it wasn't getting foggy
outside, I had my daughter up on the foredeck wiping the windows constantly
while I sponged them off inside - just so we could see. The amount of sudden
condensation was formidable. (Trojan 26.)

Is general pilothouse heating adequate for this? I suspect not. Anyone heat
their windshields, the way the "defrost" setting works in an automobile?

====

Charles T. Low
www.boatdocking.com

====

"Short Wave Sportfishing" wrote in message
...
The more I get into designing the new interior of this '68 Chris Craft
Corsair I want to turn into a winter boat, the more I get to wondering
about different things. One of which was brought home this morning as
I took the dogs out for exercise.

Having arthritis, cold isn't my friend. Adding to that, I don't enjoy
the cold all that much - never have. I tolerate it, but I don't like
it. Therefore, it is paramount in a winter boat to have....

HEAT.

My thought was to pull heat off the engine much like the radiator
system in a car. The way the design is developing, there will be an
interior cabin of a sort or at least a place where one could get out
of the wind, rain, etc. Think of a Parker/Steiger type pilot house
without the adjoining cuddy space. This is where I would put the
heating unit.

I'm just not sure this is a valid way of heating this small space.

Any thoughts?

Later,

Tom
-----------
"Angling may be said to be so
like the mathematics that it
can never be fully learnt..."

Izaak Walton "The Compleat Angler", 1653

"Charles T. Low" [withoutUN] wrote in message wsgroups.com...
A very practical problem is windshield fogging. This happened on my boat one
cool evening this Fall, and after I realized it wasn't getting foggy
outside, I had my daughter up on the foredeck wiping the windows constantly
while I sponged them off inside - just so we could see. The amount of sudden
condensation was formidable. (Trojan 26.)

Is general pilothouse heating adequate for this? I suspect not. Anyone heat
their windshields, the way the "defrost" setting works in an automobile?

====

Charles T. Low
www.boatdocking.com

====

"Short Wave Sportfishing" wrote in message
...
The more I get into designing the new interior of this '68 Chris Craft
Corsair I want to turn into a winter boat, the more I get to wondering
about different things. One of which was brought home this morning as
I took the dogs out for exercise.

Having arthritis, cold isn't my friend. Adding to that, I don't enjoy
the cold all that much - never have. I tolerate it, but I don't like
it. Therefore, it is paramount in a winter boat to have....

HEAT.

My thought was to pull heat off the engine much like the radiator
system in a car. The way the design is developing, there will be an
interior cabin of a sort or at least a place where one could get out
of the wind, rain, etc. Think of a Parker/Steiger type pilot house
without the adjoining cuddy space. This is where I would put the
heating unit.

I'm just not sure this is a valid way of heating this small space.

Any thoughts?

Later,

Tom
-----------
"Angling may be said to be so
like the mathematics that it
can never be fully learnt..."

Izaak Walton "The Compleat Angler", 1653


@ Charles:

You can buy electric heater/fans which you may be able to instal and
blow warm air on the windshield. This will ad some fire hazards so
watch out. A quick fix would be any little 12V fan placed to blow on
the windshield.

I tried Anti Fogging compound on my windshileds with NO effect.

@ Tom:
I think running heat of the motor should be possible but take in mind
that you are adding all the headaches that come with water
heatexchangers and leaks, pipes ... not a good thing for reliability.
If you have the space and cash then maybe get an external heater. They
make them for cars and they run of diesel or gas and heat the/a
watersystem one manufacturer is webasto.

Matt

"Charles T. Low" [withoutUN] wrote in message
sgroups.com...
Is general pilothouse heating adequate for this? I suspect not. Anyone
heat
their windshields, the way the "defrost" setting works in an automobile?

The only time I have had this problem is during the lighted boat parades,
when it is really cold out, moving really slow and have a bunch of people
steaming up the flybridge.

Fortunately, the generator is running anyway, so I just take a small
electric heater and set it to blow on the windshield.

Rod