auxiliary heat

Does anyone in the group use a 12v auxiliary heater or heated blanket for
added cabin or passenger heat? I've seen that they come in 150watt/12.5 amp
and 300watt/ 30amp versions. We'd have to figure out the current load on
our alternators but I'm wondering if we should even consider such an option
for the rear seat passengers in our Aztec. I've seen this quesion asked
before but it's been several years.

Jim


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What about portable heated seat cushions?? 12v/60watt/5amp 100-120 degrees
surface temp

"Jim Burns" wrote in message
...
Does anyone in the group use a 12v auxiliary heater or heated blanket for
added cabin or passenger heat? I've seen that they come in 150watt/12.5
amp
and 300watt/ 30amp versions. We'd have to figure out the current load on
our alternators but I'm wondering if we should even consider such an
option
for the rear seat passengers in our Aztec. I've seen this quesion asked
before but it's been several years.

Jim


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I'm assuming you mean for seat heat, and not space heat? It's awfully
difficult to get much heat out of 14V. Even automotive folks (with a fairly sealed
cabin) do very minimal heating on very localized areas (read: arse). It might be
doable, but only for localized/concentrated situations (seat heat, blankets, etc).

Imagine getting cabin heat from a hair dryer... 1250-1500W... around 100A for
14v.

-Cory

Jim Burns wrote:
: Does anyone in the group use a 12v auxiliary heater or heated blanket for
: added cabin or passenger heat? I've seen that they come in 150watt/12.5 amp
: and 300watt/ 30amp versions. We'd have to figure out the current load on
: our alternators but I'm wondering if we should even consider such an option
: for the rear seat passengers in our Aztec. I've seen this quesion asked
: before but it's been several years.

: Jim


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: Outgoing mail is certified Virus Free.
: Checked by AVG anti-virus system (http://www.grisoft.com).
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************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************

Correct.
It would be about like huddling around a 150 watt lightbulb. I'm thinking
heated seats or blankets.
Jim
wrote in message
...
I'm assuming you mean for seat heat, and not space heat? It's awfully
difficult to get much heat out of 14V. Even automotive folks (with a
fairly sealed
cabin) do very minimal heating on very localized areas (read: arse). It
might be
doable, but only for localized/concentrated situations (seat heat,
blankets, etc).

Imagine getting cabin heat from a hair dryer... 1250-1500W... around 100A
for
14v.

-Cory

Jim Burns wrote:
: Does anyone in the group use a 12v auxiliary heater or heated blanket
for
: added cabin or passenger heat? I've seen that they come in 150watt/12.5
amp
: and 300watt/ 30amp versions. We'd have to figure out the current load
on
: our alternators but I'm wondering if we should even consider such an
option
: for the rear seat passengers in our Aztec. I've seen this quesion asked
: before but it's been several years.

: Jim


: ---
: Outgoing mail is certified Virus Free.
: Checked by AVG anti-virus system (http://www.grisoft.com).
: Version: 6.0.775 / Virus Database: 522 - Release Date: 10/8/2004



--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************



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Back in WW2 they used to have heated flight suits for the crews
of military aircraft. I imagine that they were particularly
useful in the high flying bombers with huge open gun ports on
the sides. I had a pair of the slippers at one time, and found
that they really did work. I used a variable DC supply to power
them. Originally they ran on aircraft power (28V) through a
rheostat. I never tried them in an airplane, but something similar
may be what you need. I have seen some battery powered socks in
outdoor supply catalogs.

Another approach might be chemical heat pads. I happened to look
at some in the hardware store the other day. You activate them
by simply opening the package and exposing the pad to the air.
Finding out if they will do the job will be cheap - they only
cost a dollar or so.

David Johnson

On 18 Oct 2004 20:05:15 -0700, (David Johnson) wrote:

Another approach might be chemical heat pads.


These things work great, just make sure they're on the outside of your
socks.

I used 'em a bunch flying Cubs in the winter. For some reason if your
feet are warm your whole body feels a bit warmer.

z

There are motorcycle vests that really work. They use the motorcycle
battery so they don't draw "much", though I really don't know how
much. It's like having the sun beating down on your back. Work best
worn under a jacket. Check out moto cycle shop or online motorcycle
supply place.

"Jim Burns" wrote in message ...
Does anyone in the group use a 12v auxiliary heater or heated blanket for
added cabin or passenger heat? I've seen that they come in 150watt/12.5 amp
and 300watt/ 30amp versions. We'd have to figure out the current load on
our alternators but I'm wondering if we should even consider such an option
for the rear seat passengers in our Aztec. I've seen this quesion asked
before but it's been several years.

Jim


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I used a heated seat cushion, chemical packs (in lots of places)
and a little 12VDC car (air) heater when I was going between
California and Indiana a couple winters ago without heat. I
still froze.

I recommend lots of insulative clothing and heating devices under
that. (Try the heaters designed for motorcycle riders.)

--kyler

On 18-Oct-04 20:40 zatatime wrote:
On 18 Oct 2004 20:05:15 -0700, (David Johnson) wrote:

[snip]

For some reason if your
feet are warm your whole body feels a bit warmer.

That's the theory I used when I wired in some Gerbing's electrically
heated socks for my Long-EZ. They're economical (both cost-wise at $60
and energy-drain wise at 2A). I picked up a set in a Boise (Idaho)
motorcycle shop but they're available on the web too. See
http://www.gerbing.com/pages/clothing/socks.html

Along with thermal underwear, they fill 90% of my heat requirements for
wintertime flying at medium altitudes (FL010 to FL180) but my right hand
still gets too cold for comfort. I think the stick's control grip is
"sucking the heat" out of my hand so I'm looking at a Rube Goldbergesque
scheme to put a small power resistor into the stick.

--

Joe
(Remove "NOSPAM" to reply via Email)
Long-EZ 821RP
Clarkston, WA

That's the theory I used when I wired in some Gerbing's electrically
heated socks for my Long-EZ.

Hmm. This is something I'd not considered before, never having seriously
considered a homebuilt plane.

Do Long-EZs not have *any* heat? Does having the engine behind you
preclude using hot air off the exhaust for cabin heat?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"