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Guest
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 Posted: Wed Jan 14, 2009 11:02 pm Post subject: Using car exhaust for engine Pre- heat?? |
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Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
I would allow the exhaust to heat the engine up just enough to get it
past freezing give or take plus turn the prop to limber the oil
This seems like a inexpensive idea to pre heat
Any corrosion potential ?? What do you think
Thank you for your comments. |
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Paul kgyy
Guest
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| Posted: Wed Jan 14, 2009 11:21 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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How cold? What weight oil?
The main problem with car exhaust is that all that water will condense
all over the cold airplane engine. Also, if the car is idling, the
exhaust might not be all that hot (i.e. slow process). |
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Bob Noel
Guest
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| Posted: Thu Jan 15, 2009 2:05 am Post subject: Re: Using car exhaust for engine Pre- heat?? |
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rpfrantz (AT) gmail (DOT) com wrote:
| Quote: | Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
I would allow the exhaust to heat the engine up just enough to get it
past freezing give or take plus turn the prop to limber the oil
This seems like a inexpensive idea to pre heat
Any corrosion potential ?? What do you think
|
I think there would too much water vapor and too much chance
of CO. I don't know if today's engines have a clean enough
exhaust that I would risk my aircraft engine. Besides, I did
spring for a preheater (a red dragon preheater)
btw - flexible aluminum wouldn't be my first choice. I have
some hose that came with my preheater that won't be a hot to
the touch as aluminum ducting would be. |
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Clark
Guest
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| Posted: Thu Jan 15, 2009 6:18 am Post subject: Re: Using car exhaust for engine Pre- heat?? |
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rpfrantz (AT) gmail (DOT) com wrote in news:0aed474f-8115-4575-84e4-18b6c58bb1b3
@n10g2000vbl.googlegroups.com:
| Quote: | Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
I would allow the exhaust to heat the engine up just enough to get it
past freezing give or take plus turn the prop to limber the oil
This seems like a inexpensive idea to pre heat
Any corrosion potential ?? What do you think
Thank you for your comments.
|
Big time corrosion potential with all that water vapor and CO2. Carbonic acid
is a problem with any combustion gas...
--
---
there should be a "sig" here |
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nrp
Guest
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| Posted: Thu Jan 15, 2009 3:27 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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On Jan 14, 11:22 pm, Clark <c...@uswest.net> wrote:
| Quote: | rpfra...@gmail.com wrote in news:0aed474f-8115-4575-84e4-18b6c58bb1b3
@n10g2000vbl.googlegroups.com:
Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
Carbonic acid isn't the problem but the nitrogen oxides and sulfur |
oxides combine with the water of combustion to make nitric and
sulfuric acids! |
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Ross
Guest
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| Posted: Thu Jan 15, 2009 6:05 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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nrp wrote:
| Quote: | On Jan 14, 11:22 pm, Clark <c...@uswest.net> wrote:
rpfra...@gmail.com wrote in news:0aed474f-8115-4575-84e4-18b6c58bb1b3
@n10g2000vbl.googlegroups.com:
Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
Carbonic acid isn't the problem but the nitrogen oxides and sulfur
oxides combine with the water of combustion to make nitric and
sulfuric acids!
|
I assume that you do not have electricity at your aircraft otherwise a
Tanis, etc preheater installed would be much better, or a modified
ceramic heater with ducting. I have a Tanis that heats the oil and all
four cylinders.
--
Regards, Ross
C-172F 180HP
KSWI |
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Terry
Guest
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| Posted: Thu Jan 15, 2009 6:05 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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Typical exhaust gas temps at the tail pipe would not be hot enough. I
would worry about corrosive gases, condensation etc getting into and
behind the instrument panel and gauges. I use the "Red Dragon" and
preheat for at least 30 minutes. Even if you rev'd the engine on your
car, you would never come close to the temps that a good propane heater
does.
Just my 2 cents... Good luck
Terry N6401F |
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David Lesher
Guest
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| Posted: Thu Jan 15, 2009 8:12 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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Clark <ch2 (AT) uswest (DOT) net> writes:
| Quote: | Big time corrosion potential with all that water vapor and CO2. Carbonic acid
is a problem with any combustion gas...
|
Note that mufflers rust out. There's a reason why, and the exhaust gas is it.
On a home furnace, you use a clay or PVC flue.
[It's less of an issue when the muffler/flue gets HOT and stays hot. It's the
cooler ones where the gases condense that get you..]
--
A host is a host from coast to coast.................wb8foz (AT) nrk (DOT) com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433 |
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Robert M. Gary
Guest
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| Posted: Mon Jan 26, 2009 9:15 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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On Jan 14, 3:02 pm, rpfra...@gmail.com wrote:
| Quote: | Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
|
If you do this can you video tape it and send a copy to the CMT?
-Robert |
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Mark Hansen
Guest
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| Posted: Mon Jan 26, 2009 10:06 pm Post subject: Re: Using car exhaust for engine Pre- heat?? |
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On 01/26/09 13:15, Robert M. Gary wrote:
| Quote: | On Jan 14, 3:02�pm, rpfra...@gmail.com wrote:
Greetings:
It's winter here in Tennessee �a question for the group: �If I took a
flexible �Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine �cowling to pre-
heat the aircraft's �engine �would this cause any problems?
If you do this can you video tape it and send a copy to the CMT?
-Robert
|
I get what you're saying, but what is CMT? Acronym Finder was of little
help :-(
--
Mark Hansen, PP-ASEL, Instrument Airplane, USUA Ultralight Pilot
Cal Aggie Flying Farmers
Sacramento, CA |
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Robert M. Gary
Guest
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| Posted: Thu Jan 29, 2009 5:36 am Post subject: Re: Using car exhaust for engine Pre- heat?? |
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On Jan 26, 1:39 pm, Mark Hansen <m...@NOSPAMwinfirst.com> wrote:
| Quote: | I get what you're saying, but what is CMT? Acronym Finder was of little
help 
|
Country Music Television. They have a redneck version of Americas
Funniest Home Videos.
-Robert |
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Kobra
Guest
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| Posted: Sat Jan 31, 2009 2:05 am Post subject: Re: Using car exhaust for engine Pre- heat?? |
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<rpfrantz (AT) gmail (DOT) com> wrote in message
news:0aed474f-8115-4575-84e4-18b6c58bb1b3 (AT) n10g2000vbl (DOT) googlegroups.com...
| Quote: | Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
I would allow the exhaust to heat the engine up just enough to get it
past freezing give or take plus turn the prop to limber the oil
This seems like a inexpensive idea to pre heat
Any corrosion potential ?? What do you think
Thank you for your comments.
|
Depending on your ambient temps and if you have a hangar with electric, just
a sealed light bulb (100 or 120 watts) hanging in your oil door might be all
you need. Just make sure the bulb is sealed in a casing, such as a drop
light, and won't burn any hoses or such.
You could put it on a timer that goes off at say at 11 pm and turns back on
at 7 am...or whatever would suit your flying needs. They make inexpensive
times that even know what day of the week it is and if you only fly on
Saturday and Sunday...well you get the idea.
Reiff and Tanis Heaters are pretty inexpensive to buy and install...again,
if you have electric in your hangar.
Without electric and a hangar...hmmm...there's always the FBO 25 dollar fee
or a propane fired pre-heater...but unless you make it yourself...it's
pretty expensive. There can't be much to it. A propane tank, a regulator
and hose, a squirrl cage fan, two clothes dryer hoses and some type of heat
exchanger box. I'm sure someone has posted a home-made unit online
somewhere. Readers, anyone know of such a thing??
Kobra |
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Drew Dalgleish
Guest
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| Posted: Sat Jan 31, 2009 6:21 am Post subject: Re: Using car exhaust for engine Pre- heat?? |
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On Fri, 30 Jan 2009 22:54:32 GMT, "Kobra" <drgwentzel (AT) verizon (DOT) net>
wrote:
| Quote: |
rpfrantz (AT) gmail (DOT) com> wrote in message
news:0aed474f-8115-4575-84e4-18b6c58bb1b3 (AT) n10g2000vbl (DOT) googlegroups.com...
Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
I would allow the exhaust to heat the engine up just enough to get it
past freezing give or take plus turn the prop to limber the oil
This seems like a inexpensive idea to pre heat
Any corrosion potential ?? What do you think
Thank you for your comments.
Depending on your ambient temps and if you have a hangar with electric, just
a sealed light bulb (100 or 120 watts) hanging in your oil door might be all
you need. Just make sure the bulb is sealed in a casing, such as a drop
light, and won't burn any hoses or such.
You could put it on a timer that goes off at say at 11 pm and turns back on
at 7 am...or whatever would suit your flying needs. They make inexpensive
times that even know what day of the week it is and if you only fly on
Saturday and Sunday...well you get the idea.
Reiff and Tanis Heaters are pretty inexpensive to buy and install...again,
if you have electric in your hangar.
Without electric and a hangar...hmmm...there's always the FBO 25 dollar fee
or a propane fired pre-heater...but unless you make it yourself...it's
pretty expensive. There can't be much to it. A propane tank, a regulator
and hose, a squirrl cage fan, two clothes dryer hoses and some type of heat
exchanger box. I'm sure someone has posted a home-made unit online
somewhere. Readers, anyone know of such a thing??
Kobra
I have a radiant heater that I built an aluminum box in front of and |
off of it A couple 5" heat ducts that go into the cowl inlets it works
OK but I'm sure it would be better with a fan. A blanket over the cowl
is needed to keep the heat in. This is the heater I use.
http://www.mrheater.com/productdetails_extended.asp?catid=42&id=21 |
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