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heater fan

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Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Sun Jan 10, 2010 8:52 am Post subject: heater fan

I was out flying yesterday and the OAT was 25 degrees. That's pretty cold for Fl so I rapidly froze my butt off (I wish !) The little muffin fan in my heater was not putting out enough air. It was warm enough but not enough flow. Any ideas for a replacement fan that has a reasonably low amp draw?

                   Thanks,

                                       Dick Maddux

                                       Rotax 912

                                       Milton,Fl

  [quote][b]

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aluminum.flyer(at)gmail.c
Guest

Posted: Sun Jan 10, 2010 9:44 am Post subject: heater fan

We don't use a heater at 25 degrees. We fly at work up to -40 degrees

F. Now that is cold!



Manitoba, Canada

Currently 16 degrees F.



On Sun, Jan 10, 2010 at 10:12 AM,  <catz631(at)aol.com> wrote:

 	  Quote: 	
		   I was out flying yesterday and the OAT was 25 degrees. That's pretty cold

 for Fl so I rapidly froze my butt off (I wish !) The little muffin fan in my

 heater was not putting out enough air. It was warm enough but not enough

 flow. Any ideas for a replacement fan that has a reasonably low amp draw?

                   Thanks,

                                       Dick Maddux

                                       Rotax 912

                                       Milton,Fl

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Jan 10, 2010 11:13 am Post subject: heater fan

I was flying yesterday, (6 degrees F) and today at about 3 degrees  

F....up from minus 3 F, and I was warm enough. I had found a Dr.  

Scholl's back pad vibrator and warmer that draws 1000mA...yup, 1 amp.  

I only use the heating part and it feels good....you might look into  

one of these.



As an aside, I was flying into what looked like low fog/clouds at  

about 2500 MSL, and the visibility was getting worse, so I turned  

around and headed back home. When I got on the ground, I found about  

3/16" of ice on the prop, upper corners of the windshield, and about  

1/16" along the front of the wing, just above and just below the  

leading edge. There was ice on the jury struts, the landing gear, the  

lift struts....just about everywhere. When I started to fly, the sky  

was clear, and the sun was out in spots. No indication of foul  

weather on the local airport reports, but I was 15 miles from the  

reporting station. I had noticed that the visibility was fairly good  

out both sides of the plane, but not so good straight ahead. Then I  

noticed the ice building on the upper corners of the windshield, near  

the spar-to-windshield covers, and I realized that the reason that  

the vis wasn't so good straight ahead was because I was trying to see  

through an iced up windshield. Ski flying is great, but sometimes you  

run into stuff like that.



Got the skis on yet, Dick? : )



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 834.5 hrs

Countdown to 1000 hrs~167 to go

Sensenich 62"x46" Wood prop

Electroair direct-fire ignition system

Rotec TBI-40 injection

Status: flying (and learning)

do not archive



On Jan 10, 2010, at 11:12 AM, catz631(at)aol.com wrote:



 	  Quote: 	
		   I was out flying yesterday and the OAT was 25 degrees. That's  

 pretty cold for Fl so I rapidly froze my butt off (I wish !) The  

 little muffin fan in my heater was not putting out enough air. It  

 was warm enough but not enough flow. Any ideas for a replacement  

 fan that has a reasonably low amp draw?

                   Thanks,

                                       Dick Maddux

                                       Rotax 912

                                       Milton,Fl

 www.matronics.com/contribution _- 

 ============================================================

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

pchristensen10(at)austin.
Guest

Posted: Sun Jan 10, 2010 11:20 am Post subject: heater fan

What was your water temp?  I tape my radiator when it is  that cold to keep the water temp up.  I too have a muffin fan.

  

 Pete

 Kitfox III, 912, grove

 N. of Austin, TX

  

 [quote]   ---

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akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Sun Jan 10, 2010 11:33 am Post subject: Re: heater fan

some of the high power CPU cooling fans move alot more air than the stock fan that comes with the KF.  You can also make a heat muff in about an hour out of some thin aluminum.



I will get some pics of the install I did on a buddy's Avid that took about an hour. in the mean time, I will give a quick description.



.060 aluminum cut to the max length you can get between the muffler hangers (around 7" or so).  3 lengths of the fiber rope that goes around fireplace doors.  wrap a length around each end of the muffler to seal the ends off using the glue / paste that they provide with the rope.  cut out an inlet and outlet hole and make nozzles with scrap aluminum by wrapping it around a chunk of wood the size of the scat tubing.  few pop rivets and some high temp RTV and and you have the nozzles.  Run a length of the rope from one end of the shroud to the other between the nozzles so the air has to go all the way around the muffler to get to the outlet.  After the rope ends set up, I wrapped the aluminum around the muffler and held in place with a couple wrapps of safety wire pulled tight.  A half dozen or so holes drilled and pop riveted holds it all together with a wrap piece of aluminum tape doing the final seal on the joint.



The secret I found was wrapping the heat muff with a foil backed muffler wrap to stop the cold air from hitting the outside of the heat muff.  I found some wrap in the performance section of the local auto-parts store.  It came in a blanket about 36" X 40" and was sort of spendy, but it has done 3 planes with enough left over to do a couple more.



edit for a link to the wrap:  http://www.jscspeed.com/universal/thermotec/heat_barrier.htm



Part # 14001 is what I used as it would be impossible to get the adhesive back wrap in place unless you took the muffler off the plane.

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_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....

Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Sun Jan 10, 2010 7:52 pm Post subject: heater fan

At 08:12 AM 1/10/2010, you wrote:

 	  Quote: 	
		  It was warm enough but not enough flow. Any ideas for a replacement 

fan that has a reasonably low amp draw?


	


Any way you can force feed it some outside air? Or do you want to 

stick with a recirc system?

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 400 hrs. and counting

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

icubob(at)gmail.com
Guest

Posted: Mon Jan 11, 2010 5:24 am Post subject: heater fan

the usual way to ''force feed'' is with a naca vent mounted in the cowl or with a round hole in the cowl in front. lycs. and cont. often would have that rould hole in the plenum baffling right inside the air intake hole.

   bob noffs

 with a ''force feed'' thru a heat muff my piper warrior would get as warm as you wanted it at 15 deg f.



 On Sun, Jan 10, 2010 at 9:45 PM, Guy Buchanan <bnn(at)nethere.com (bnn(at)nethere.com)> wrote:

 [quote]--> Kitfox-List message posted by: Guy Buchanan <bnn(at)nethere.com (bnn(at)nethere.com)>

 

At 08:12 AM 1/10/2010, you wrote:

  	  Quote: 	
		  It was warm enough but not enough flow. Any ideas for a replacement fan that has a reasonably low amp draw?

 	


Any way you can force feed it some outside air? Or do you want to stick with a recirc system?

Guy Buchanan

San Diego, C=======

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[b]

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Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Mon Jan 11, 2010 8:08 am Post subject: heater fan

Well, I knew you guys were going to bust my b--ls about me wining about 25 degree temp (now it is 17) but remember this is Florida (as summer will testify) My plane is not set up for this "cold" weather. And besides I was the only one flying in my area everyone else was inside (might have also been due to the 25-30 kt wind gusts)

  Anyway, I had my water/oil cooler taped up like a mummy, so they were warm. I really don't want to do a whole lot of modifying to my aircraft as this cold weather is a relatively rare thing so am going to find a muffin fan with more output. 

  Thanks for the muffler heater idea,Leonard. That sounds like the Rans S7 heater that Spruce sells. If we get alot more of this"global warming" weather down here and I can't get the heater up to par, I will look into the muff idea.

                                                     Dick Maddux

                                                     Fox 4

                                                     Milton,Fl

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