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auto engine liquid cooling

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ter_turn(at)yahoo.com
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Posted: Mon Dec 11, 2006 12:32 pm Post subject: auto engine liquid cooling

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Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Mon Dec 11, 2006 12:36 pm Post subject: Re: auto engine liquid cooling

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_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

ter_turn(at)yahoo.com
Guest

Posted: Mon Dec 11, 2006 2:20 pm Post subject: auto engine liquid cooling

Hi, a question for the gearheads among you is this. Aside from being heavy, what's the downside of using an automobile AC condenser rather than AC evaporators or regular radiator for aircraft convesion? Thanks. 

  Do Not Archive.

   

  Terry Turnquist

  601XL-Plans

  St. Peters, MO



Gig Giacona <wr.giacona(at)cox.net> wrote:

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W.R. "Gig" Giacona

601XL Under Construction

See my progress at www.peoamerica.net/N601WR





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tshank(at)core.com
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Posted: Mon Dec 11, 2006 7:07 pm Post subject: auto engine liquid cooling

Terry,

 When I was designing the cooling system for my Stratus Suburu several years ago I tested an AC evaporator and several heater cores to find the right combination for my installation. In general I found that the AC units were less effective in heat exchange than the heater cores. I believe the reason is that the AC system has to be capable of holding  a hundreds pounds of pressure or so, while the auto heat exchanger only has to hold 14 psi. Consequently if you look at the AC heat exchanger it is much heavier and has thicker passages. Heater cores and auto radiators appear to be almost paper thin and transfer the heat more effectively.

 

 Tim Shankland

 

 Terry Turnquist wrote: [quote]   Hi, a question for the gearheads among you is this. Aside from being heavy, what's the downside of using an automobile AC condenser rather than AC evaporators or regular radiator for aircraft convesion? Thanks. 

   Do Not Archive.

    

   Terry Turnquist

   601XL-Plans

   St. Peters, MO

   

   Gig Giacona <wr.giacona(at)cox.net> (wr.giacona(at)cox.net) wrote:

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 W.R. "Gig" Giacona

 601XL Under Construction

 See my progress at www.peoamerica.net/N601WR

     

     

     

     

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n801bh(at)netzero.com
Guest

Posted: Tue Dec 12, 2006 6:25 am Post subject: auto engine liquid cooling

Tim is correct there, also on a cooling system you need to move the coolant through the whole system quickly, the small tubes in the AC exchanger restricts that too much. I had great results with a company down in Kingman Az called Alumarad. The guy is the best on building custom sized radiators and at a reasonable price..

Ben Haas

N801BH

www.haaspowerair.com



-- Tim & Diane Shankland <tshank(at)core.com> wrote:

Terry,

When I was designing the cooling system for my Stratus Suburu several years ago I tested an AC evaporator and several heater cores to find the right combination for my installation. In general I found that the AC units were less effective in heat exchange than the heater cores. I believe the reason is that the AC system has to be capable of holding  a hundreds pounds of pressure or so, while the auto heat exchanger only has to hold 14 psi. Consequently if you look at the AC heat exchanger it is much heavier and has thicker passages. Heater cores and auto radiators appear to be almost paper thin and transfer the heat more effectively.



Tim Shankland



Terry Turnquist wrote:  [quote] Hi, a question for the gearheads among you is this. Aside from being heavy, what's the downside of using an automobile AC condenser rather than AC evaporators or regular radiator for aircraft convesion? Thanks. 

 Do Not Archive.

  

 Terry Turnquist

 601XL-Plans

 St. Peters, MO



Gig Giacona <wr.giacona(at)cox.net> (wr.giacona(at)cox.net) wrote:

  	  Quote: 	
		  --> Zenith-List message posted by: "Gig Giacona" 



The message above doesn't show in the Forum Interface.



--------

W.R. "Gig" Giacona

601XL Under Construction

See my progress at www.peoamerica.net/N601WR





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Jess
Guest

Posted: Tue Dec 12, 2006 6:58 am Post subject: auto engine liquid cooling

Fellows years ago when we were using evaporators for our projects we found the following, The Harrison's built for GM had larger water passages than the ones built for Ford.  Even though they are thick they cool excellant. The real secret is to direct air into them without leakage and have a good "draw" at the cowling outlet. If you test your cowls in various angles of attack and at different speeds (tufting, smoke) you will be amazed at what you see. 1"  "U" bends were available from Johnstone supply and can be welded to the units. We even sawed them to the length and welded parts on. Again this was in the very early days. But again beware of the passages in the units, one the GM will flow water the other won't and they look the same externally.

 Belted Air Power

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dougsnash(at)yahoo.com
Guest

Posted: Tue Dec 12, 2006 7:18 am Post subject: auto engine liquid cooling

A good friend of mine has a Subaru EA-81 on a

Bushcaddy R-80 using the A/C Evaporator for cooling. 

During initial ground running and taxi testing he was

having serious overheating problems.  His cooling

system was as recommended on the Subaru newsgroups

except for one major flaw.  He had used a Ford AC

evaporator.  The one that has been used successfully

is a GM Van evaporator.  Once he switched to the GM

one, his cooling issues were solved.



He was quite surprised by this development.  How can

two evaporators perform so differently.  He went to

the automotive AC shop that he purchased his

evaporators from and they ran a scraped GM and a

scrapped Ford evaporator through the band-saw to get a

cross section of the two brands.  The GM evaporator

tubing was about twice the size of the Ford.



No, I'm not knocking Fords, just in this application,

the GM unit works better.



Do not archive



Doug MacDonald

CH-701 Scratch builder

Rotax 912 UL

NW Ontario, Canada

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rvickski(at)yahoo.com
Guest

Posted: Tue Dec 12, 2006 5:07 pm Post subject: auto engine liquid cooling

The reason against AC condensers (located in front of

the radiator)is that they don't have side tanks, it is

one tube, so flow and efficiency would be the issue. 



Roy, 701, plans, slat pondering

do not archive

 

Cheap talk?

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