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Aero Carb

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rosestar(at)sonic.net
Guest

Posted: Sat Sep 05, 2009 4:39 pm Post subject: Aero Carb

Hello.  I fly a Zodiac XL with a Jabiru 3300.  I am considering 

replacing the Bing carby with an Aero Carb.  I've read a lot about the 

Aero Carb.  Now I would like to find information from those who have 

actually used it on the Jab 3300.  What are the good points?  Are there 

any criticisms or bad points?  I also fly certified aircraft so I am 

used to having mixture control on those planes.  I live near mountains 

so getting over them is a must...I sometimes fly short distances as high 

as 13500 feet.  Any information from experience that you might have is 

greatly appreciated.



Brad DeMeo

N601BD

CH601XL

California

mhubel

Joined: 05 Sep 2009
Posts: 141

Posted: Sat Sep 05, 2009 5:24 pm Post subject: Re: Aero Carb

I am working on the installation of an Aerocarb on a 3300 installed in a CH601XL. I have had problems with heat causing vapor in the fuel lines. Once this is fixed, I will post a solution and you can decide if you want to go that route.

_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
Pictures at photo.hubbles.com

Lynn Matteson

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

Posted: Sat Sep 05, 2009 5:40 pm Post subject: Aero Carb

Read a little bit about the Rotec TBI-40 before you make up your mind  

about swapping fuel metering systems. Don't know much about its use  

on a 3300, but it works well on my 2200.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 758.3 hrs

Sensenich 62"x46" Wood prop

Electroair direct-fire ignition system

Rotec TBI-40 injection

Status: flying

On Sep 5, 2009, at 8:32 PM, Rosalie wrote:



 	  Quote: 	
		   



 Hello.  I fly a Zodiac XL with a Jabiru 3300.  I am considering  

 replacing the Bing carby with an Aero Carb.  I've read a lot about  

 the Aero Carb.  Now I would like to find information from those who  

 have actually used it on the Jab 3300.  What are the good points?   

 Are there any criticisms or bad points?  I also fly certified  

 aircraft so I am used to having mixture control on those planes.  I  

 live near mountains so getting over them is a must...I sometimes  

 fly short distances as high as 13500 feet.  Any information from  

 experience that you might have is greatly appreciated.



 Brad DeMeo

 N601BD

 CH601XL

 California

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Peter H

Joined: 20 Mar 2007
Posts: 197

Posted: Sat Sep 05, 2009 10:55 pm Post subject: Aero Carb

Brad,

I fitted an Aerocarb to my J3300 and decided it was unsafe. The slide

mechanism is off centre and near low throttle openings the slide jams. When

I attempted to suggest some design modifications I was abused. When I asked

for a refund I was told to sell it on eBay.

Take a close look at the way in which the cable is attached to the slide.

Movement of the cable causes the slide to tilt and twist because the

attachment is off centre and also is not coplanar with the slide.

At low throttle settings there is a lot of suction force on the slide and

although the company has tried several different mods to reduce friction

they have not addressed the cause of the problem.

A hangar mate had a similar experience with an installation on the 4cyl Jab

engine.

Peter

--

pjdisher(at)bigpond.com
Guest

Posted: Sat Sep 05, 2009 11:25 pm Post subject: Aero Carb

G'Day Brad. I put the RevMaster 40mm carby on my engine and find it just 

great, all though, I have never used the Bing, so I can't compair the two.

I will say that I much perfered the design of the RevMaster, over the Aero 

Carb, for reason that, the sliding action of the RMs "Guillotine slide" is 

pulled on centre line and in my opion, would have far less chance of racking 

and then possibly jaming, you would not want this to happen.

Have a chat with Peter Harris in QLD.

Pete Disher,

kit 30

VH-PDI



---

Lynn Matteson

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

Posted: Sun Sep 06, 2009 3:14 am Post subject: Aero Carb

Have a look at the Rotec TBI-40 for comparison....it is...in my  

opinion...a far better-made piece of work than the A'carb. And the  

operation is nearly perfect. I can't compare it with the RevMaster,  

as I haven't seen it.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 758.3 hrs

Sensenich 62"x46" Wood prop

Electroair direct-fire ignition system

Rotec TBI-40 injection

Status: flying

On Sep 6, 2009, at 3:24 AM, peter disher wrote:



[quote] 

 <pjdisher(at)bigpond.com>



 G'Day Brad. I put the RevMaster 40mm carby on my engine and find it  

 just great, all though, I have never used the Bing, so I can't  

 compair the two.

 I will say that I much perfered the design of the RevMaster, over  

 the Aero Carb, for reason that, the sliding action of the RMs  

 "Guillotine slide" is pulled on centre line and in my opion, would  

 have far less chance of racking and then possibly jaming, you would  

 not want this to happen.

 Have a chat with Peter Harris in QLD.

 Pete Disher,

 kit 30

 VH-PDI



 ---

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Sun Sep 06, 2009 10:12 am Post subject: Re: Aero Carb

My hanger mate had an AeroCarb on his 3300 and it always had EGT temp issues that never could get adjusted out even with different needles and talking with the factory. He went to the Bing 94 with a 255 standard main jet and the temps came down 150F. He is going to try a 260 main jet as others have suggested and that should make it perfect through out the entire operating range. The EGT's with the 255 main was just a little higher than he liked. I should know the out come in a week or so. My guess it will be right on through out the rpm range with the new 260 jet.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Lynn Matteson

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

Posted: Sun Sep 06, 2009 1:41 pm Post subject: Aero Carb

Just to add another experience, I recently installed a Rotec TBI-40,  

and now my EGT's are usually within 60 degrees F. of each other at  

about 1320-1380, and the CHT's are usually within 3 to 20 degrees F.  

of each other at about the 285-320 range. And this is with my CHT's  

installed in a hotter location than the rest of the world. I should  

mention that this is running the engine "lean of peak EGT", of which  

I have become a rabid fan. Unless you try lean of peak EGT, you don't  

know what your missing. The fuel saving is pretty impressive.



With the TBI, there are no needles to fuss with, and...my own  

experience...no calls to the factory. I did email them and tell them  

that I got the thing installed within 4 days after buying it at  

Oshkosh, and that included flying home.



Lynn Matteson (one VERY happy customer)

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 760.3 hrs

Sensenich 62"x46" Wood prop

Electroair direct-fire ignition system

Rotec TBI-40 injection

Status: flying

On Sep 6, 2009, at 2:12 PM, Roger Lee wrote:



 	  Quote: 	
		   

 <ssadiver1(at)yahoo.com>



 My hanger mate had an AeroCarb on his 3300 and it always had EGT  

 temp issues that never could get adjusted out even with different  

 needles and talking with the factory. He went to the Bing 94 with a  

 255 standard main jet and the temps came down 150F. He is going to  

 try a 260 main jet as others have suggested and that should make it  

 perfect through out the entire operating range. The EGT's with the  

 255 main was just a little higher than he liked. I should know the  

 out come in a week or so. My guess it will be right on through out  

 the rpm range with the new 260 jet.



 --------

 Roger Lee

 Tucson, Az.

 Light Sport Repairman - Maintenance Rated

 Rotax Service Center

 520-574-1080





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 61759#261759

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Peter H

Joined: 20 Mar 2007
Posts: 197

Posted: Sun Sep 06, 2009 2:50 pm Post subject: Aero Carb

Right Pete,

I had the Revmaster slide type carb on a Revmaster and it was faultless.I

thought the Aerocarb would work the same but it kept on jamming.

Peter 



--

pjdisher(at)bigpond.com
Guest

Posted: Sun Sep 06, 2009 4:43 pm Post subject: Aero Carb

Thanks Peter,

 yes, I just love my RM carby, its simplicity at its best, with mixture 

control and idle cutoff all thrown in, but I must say, it did take a bit of 

effort to set up and run correctly. I find that my speeds, revs and fuel 

consumption is much the same as Buz R.

Pete D



---

mhubel

Joined: 05 Sep 2009
Posts: 141

Posted: Thu Sep 10, 2009 8:20 am Post subject: Aero Carb

Brad,

    I said that I would let you know if I got the AeroCarb working. I 

did not. At this point I have given up on it. I found three problems in 

the CH601XL installation.

    First and the no-go was the fact that with the carb at idle setting 

and the electric fuel pump on, the fuel flow rate is still so high that 

fuel effectively pours on the area close to the exhaust system.  I 

consider this to be a fire hazard. Some aircraft do not have a muffler 

mounted almost under the carb but the CH601XL with the Jabiru 3300 

firewall forward kit does. I know that if one pulls the carb mixture to 

idle cutoff there will be no fuel flow but I believe there must be at 

least two failure modes for most things to go wrong in an aircraft. 

Simply having the electric pump on while attempting an engine start can 

pour a lot of fuel out. If the exhaust system was already hot (as in 

engine re-start), this really does not sound good.

    Secondly it is very hard to get the mixture lean enough at idle. The 

fuel flow rate with the needle all the way in is still too high. One can 

get an idle but it is very rich. I expect that with a gravity fuel 

system the pressure is much lower and this is not a problem.

    Finally, this design is extremely sensitive to vapor bubbles in the 

fuel lines. Again, with a gravity fuel system, this may not be a problem 

as the amount of fuel line under the cowling is greatly reduced. Having 

a lot of fuel line even when insulated appears to be a problem.

    I am in the process of putting in a Rotec TBI 40. More on that latter.

   

On 9/5/2009 8:32 PM, Rosalie wrote:

 	  Quote: 	
		   



 Hello.  I fly a Zodiac XL with a Jabiru 3300.  I am considering 

 replacing the Bing carby with an Aero Carb.  I've read a lot about the 

 Aero Carb.  Now I would like to find information from those who have 

 actually used it on the Jab 3300.  What are the good points?  Are 

 there any criticisms or bad points?  I also fly certified aircraft so 

 I am used to having mixture control on those planes.  I live near 

 mountains so getting over them is a must...I sometimes fly short 

 distances as high as 13500 feet.  Any information from experience that 

 you might have is greatly appreciated.



 Brad DeMeo

 N601BD

 CH601XL

 California


	


-- 

Mark Hubelbank

NorthEast Monitoring

2 Clock Tower Place

Suite 555

Maynard, MA, 01754 - USA

mhubel(at)nemon.com

978-443-3955

_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
Pictures at photo.hubbles.com

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