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Jabiru Bing carb vs Aerocarb

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dlegg(at)tpg.com.au
Guest

Posted: Fri Jun 09, 2006 9:11 pm Post subject: Jabiru Bing carb vs Aerocarb

Hello all,

I am keen to know if anyone with a Jabiru engine has an Aerocarb fitted. 

The web site makes a lot of claims, better performance, better economy 

etc, and doesn't need carb heat box which is a big bonus. Any feedback 

would be great.

Darryl.

craig(at)craigandjean.com
Guest

Posted: Fri Jun 09, 2006 10:22 pm Post subject: Jabiru Bing carb vs Aerocarb

One thing that many have noticed is that the Aerocarb doesn't like fuel

systems with pumps. So avoid it if you are building a plane with wing tanks

like the 601XL. If you like the concept then consider the Ellison throttle

body - but it will cost you more.



www.ellison-fluid-systems.com/



-- Craig

craig(at)craigandjean.com
Guest

Posted: Fri Jun 09, 2006 10:22 pm Post subject: Jabiru Bing carb vs Aerocarb

Another point: Jabiru isn't wild about supporting other carbs on their

engines. If your engine is damaged and if the carb could have caused it then

you may have warrantee issues. Check for the official word from your dealer.



-- Craig 



--

p.mulwitz(at)worldnet.att
Guest

Posted: Sat Jun 10, 2006 1:24 am Post subject: Jabiru Bing carb vs Aerocarb

Hi Darryl,



I don't have answers -- just more questions for you.



Why wouldn't a carburetor need a heat box?  How does it deal with ice?



I am planning on purchasing a complete FWF engine package from 

Jabiru.  This will certainly contain the carburetor along with many 

other things.  Also, I think the engine comes standard with most 

engine accessories except for vacuum pump.  That leaves me asking why 

would you remove the Bing carburetor to replace it with a different 

brand?  What is so bad about the Bing?



Paul

XL wings

do not archive

 	  Quote: 	
		  I am keen to know if anyone with a Jabiru engine has an Aerocarb fitted.

paulrod36(at)msn.com
Guest

Posted: Sat Jun 10, 2006 11:07 am Post subject: Jabiru Bing carb vs Aerocarb

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Paul W, I'll put my two cents in on this. Carbs need a carb heat box to  avoid icing in certain temperature and humidity ranges. The reason for this is  that the venturi in a carb creates a low pressure area, which then becomes  colder, which in turn can create ice out of the water vapor in the air. Also,  the volatile gasoline, as it evaporates, helps to chill the air even more   Blame this on Bernoulli's and Boyle's laws. However, some carbs do not have a  venturi at all. There are several carbs out there that have a straight tube for  a throat, a sliding plate for a throttle, and pull a tapered needle along with  them out of a hole in the throat. (The further the needle is pulled, the more  taper is exposed, and thus more fuel provided.) That tapered needle has the flat  facing downstream, which causes a mild vacuum. That vacuum, aided by very modest  fuel pressure, allows fuel to enter the intake stream, mix, vaporize, etc.  Without a venturi to cause low pressure, and therefore lower temperature, ice  has nowhere to form. They seem to work better on some engines than on others.  Those for whom they work well, swear by them. I've seen them working fine on  Soobs, and I may well try one on the Corvair. 

  

 Paul Rodriguez

 601XL/Corvair

 [quote]   ---

craig(at)craigandjean.com
Guest

Posted: Sat Jun 10, 2006 11:27 am Post subject: Jabiru Bing carb vs Aerocarb

The Ellison is a throttle  body like the Aerocarb. Cast into the metal are the words "CARB HEAT REQD". See  the link below for details.

  

 http://www.ellison-fluid-systems.com/faqs/carburetor_heat.htm

  

 -- Craig



   From: owner-zenith-list-server(at)matronics.com  [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of  paulrod36(at)msn.com

Sent: Saturday, June 10, 2006 1:02  PM

To: zenith-list(at)matronics.com

Subject: Re: Zenith-List:  Jabiru Bing carb vs Aerocarb

 

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Paul W, I'll put my two cents in on this. Carbs need a carb heat box to  avoid icing in certain temperature and humidity ranges. The reason for this is  that the venturi in a carb creates a low pressure area, which then becomes  colder, which in turn can create ice out of the water vapor in the air. Also,  the volatile gasoline, as it evaporates, helps to chill the air even more   Blame this on Bernoulli's and Boyle's laws. However, some carbs do not have a  venturi at all. There are several carbs out there that have a straight tube for  a throat, a sliding plate for a throttle, and pull a tapered needle along with  them out of a hole in the throat. (The further the needle is pulled, the more  taper is exposed, and thus more fuel provided.) That tapered needle has the flat  facing downstream, which causes a mild vacuum. That vacuum, aided by very modest  fuel pressure, allows fuel to enter the intake stream, mix, vaporize, etc.  Without a venturi to cause low pressure, and therefore lower temperature, ice  has nowhere to form. They seem to work better on some engines than on others.  Those for whom they work well, swear by them. I've seen them working fine on  Soobs, and I may well try one on the Corvair. 

  

 Paul Rodriguez

 601XL/Corvair

 [quote]   ---

bjohnson(at)satx.rr.com
Guest

Posted: Sat Jun 10, 2006 1:21 pm Post subject: Jabiru Bing carb vs Aerocarb

Ellison says you need it, AeroConversions (Sonex) says you do not need it with the AeroCarb because there is very little surface to accumulate ice on the AeroCarb other than the “guillotine” type throttle plate which could easily be cleared by cycling the throttle (the Ellison looks very similar)  

   

The Monett’s are a very conservative bunch, I seriously doubt they would be recommending skipping carb heat if there was any chance of icing clogging up the AeroCarb, I suspect Ellison just has more conservative lawyers???  

   

-Bruce   

           

  

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Craig Payne

 Sent: Saturday, June 10, 2006 2:24 PM

 To: zenith-list(at)matronics.com

 Subject: RE: Jabiru Bing carb vs Aerocarb  

  

   

The Ellison is a throttle body like the Aerocarb. Cast into the metal are the words "CARB HEAT REQD". See the link below for details.  

   

http://www.ellison-fluid-systems.com/faqs/carburetor_heat.htm  

   

-- Craig  

       

  

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of paulrod36(at)msn.com

 Sent: Saturday, June 10, 2006 1:02 PM

 To: zenith-list(at)matronics.com

 Subject: Re: Jabiru Bing carb vs Aerocarb      

Paul W, I'll put my two cents in on this. Carbs need a carb heat box to avoid icing in certain temperature and humidity ranges. The reason for this is that the venturi in a carb creates a low pressure area, which then becomes colder, which in turn can create ice out of the water vapor in the air. Also, the volatile gasoline, as it evaporates, helps to chill the air even more  Blame this on Bernoulli's and Boyle's laws. However, some carbs do not have a venturi at all. There are several carbs out there that have a straight tube for a throat, a sliding plate for a throttle, and pull a tapered needle along with them out of a hole in the throat. (The further the needle is pulled, the more taper is exposed, and thus more fuel provided.) That tapered needle has the flat facing downstream, which causes a mild vacuum. That vacuum, aided by very modest fuel pressure, allows fuel to enter the intake stream, mix, vaporize, etc. Without a venturi to cause low pressure, and therefore lower temperature, ice has nowhere to form. They seem to work better on some engines than on others. Those for whom they work well, swear by them. I've seen them working fine on Soobs, and I may well try one on the Corvair.   

    

   

    

Paul Rodriguez  

    

601XL/Corvair  

  [quote]    

---

btucke73(at)yahoo.com
Guest

Posted: Sun Jun 11, 2006 8:13 pm Post subject: Jabiru Bing carb vs Aerocarb

While they say that the Aerocarb is not succeptible to

carb icing, the Monnets wouldn't bet the farm on it. 

When I purchased their custom filter for my Aerocarb,

it came with a legal disclaimer saying that the filter

is only for ground testing, and the carb should not be

operated in flight without the use of carb heat.  



R/



Brandon



__________________________________________________

dlegg(at)tpg.com.au
Guest

Posted: Mon Jun 12, 2006 3:56 am Post subject: Jabiru Bing carb vs Aerocarb

Hi Brandon,

Do you have any operating figures on the aerocarb, and what engine is it 

on? How do you think it compares to a normal carburettor performance 

wise and do you have a carb heat box fitted?

Darryl.

btucke73(at)yahoo.com
Guest

Posted: Mon Jun 12, 2006 7:03 pm Post subject: Jabiru Bing carb vs Aerocarb

Darryl,



     I have the 35mm spigot mount aerocarb mounted to

my corvair.  I have a header tank, which works very

well with the carb.  It has been shown by others not

to work well with wing tanks and fuel pumps, even with

expensive pressure regulators.  My experience has been

very good.  Setup is a sinch, and the engine runs very

good with it.  It idles smoothly down to 500 rpm.  I

did install a standard Cont carb heat box (ACS has

them for $140) and a homemade heat muff.  It didn't

take long to fabricate.  It runs the Corvair up to

about 2600+ RPM on a warp drive set at 9 deg.  I will

hopefully have flight information to post in a month

or so.  The only downside I have seen is that it is

basically a controlled leak.  If you set the mixture

to full rich, and not start relatively quickly, it

will be dumping fuel into the carb heat box and, if

left that way, will just continue to drip...  That is

the real function of the idle cutoff...



R/



Brandon



__________________________________________________

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