---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Thu 11/12/09: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:06 AM - Bing 94 carb question (Thom Riddle) 2. 07:49 AM - Re: Bing 94 carb question (j. davis) 3. 08:15 AM - Re: Bing 94 carb question (Thom Riddle) 4. 11:32 AM - 2200A EGT monitoring (Thom Riddle) 5. 12:05 PM - Re: Bing 94 carb question (zeprep251@aol.com) 6. 12:17 PM - Re: Bing 94 carb question (Thom Riddle) 7. 01:20 PM - Re: Re: Bing 94 carb question (zeprep251@aol.com) 8. 01:33 PM - Re: Bing 94 carb question (Thom Riddle) 9. 01:44 PM - Re: Re: Bing 94 carb question (Lynn Matteson) 10. 06:25 PM - Re: Re: Bing 94 carb question (Deb and Peter Zweck) ________________________________ Message 1 _____________________________________ Time: 07:06:13 AM PST US Subject: JabiruEngine-List: Bing 94 carb question From: "Thom Riddle" I recently dissasembled, inspected and cleaned the Bing 94 carb on my Jabiru 2200A #1574. All is well after 240 hours. Yesterday, I did the same for a customer's carb from Jabiru 2200A #2058. It is in great shape but I found one anomaly (or so it seems to me) and would like to find out if any of your Bing 94 carbs have this same thing. In the brass tube that receives fuel from starting chamber in the float bowl (not the main jet area but the small diameter chamber at one corner) there is a tiny hole in the side of this brass tube about 3/16" below the top of the fuel bowl, and thus above the normal fuel level in the bowl. If this hole is not supposed to be there it could be contributing to the cold start problem he is having by allowing excess air to be drawn in and less than full rich fuel charge during engine start. My question is this: Have any of you seen this tiny hole in the side of the brass tube that picks up fuel in the start chamber? My Bing 94 does not have this nor does any Bing 64 carb on which i've worked (lots of them). I spolke to Pete yesterday about this and he said he has never noticed this but would be looking at one of his carbs to see. I'd like to hear from any other Jabiru operators with Bing 94 carbs to see if this tiny hole is a manufacturing anomaly or "as designed" in the later engines. I've attached a photo of the carb with the hole I'm asking about. http://riddletr.googlepages.com/a%26pmechanix -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a country badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272443#272443 Attachments: http://forums.matronics.com//files/bing_94_starting_tube_hole_220.jpg ________________________________ Message 2 _____________________________________ Time: 07:49:17 AM PST US From: "j. davis" Subject: Re: JabiruEngine-List: Bing 94 carb question Thom Riddle wrote: > > > My question is this: Have any of you seen this tiny hole in the side of the > brass tube that picks up fuel in the start chamber? My Bing 94 does not have > this nor does any Bing 64 carb on which i've worked (lots of them). Just checked the Bing (guess its a 94...) that came with my 3300a s.n. 1053 It does indeed have the hole as per your pic. Bing is unused/unneeded. -- Regards, J. Sonex #325 C-FJNJ, Jabiru 3300a, Prince P-Tip, Aerocarb restoring the Johnston Special http://cleco.ca +-------------------------------------------------------------+ | J. Davis, M.Sc. | (computer science) | | *NIX consulting, SysAdmin | email: jd at lawsonimaging.ca | +-------------------------------------------------------------+ and now... Deep Thought #24, by Jack Handy I don't think I'm alone when I say I'd like to see more and more planets fall under the ruthless domination of our solar system. ________________________________ Message 3 _____________________________________ Time: 08:15:40 AM PST US Subject: JabiruEngine-List: Re: Bing 94 carb question From: "Thom Riddle" J. Thanks for your quick reply. It is unlikely that this hole is in more than one carb if it is not intentional, so it is beginning to appear to me that this is a design change implemented sometime after mine was built. -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a country badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272457#272457 ________________________________ Message 4 _____________________________________ Time: 11:32:59 AM PST US Subject: JabiruEngine-List: 2200A EGT monitoring From: "Thom Riddle" I have an Grand Rapids Technology EIS 2000 with 4 CHT readings on my Jabiru 2200A (#1574). I plan to exchange two of these CHTs for two EGTs. This is a pusher configuration and I'm would like to know which of the four cylinders should I monitor for Max and Min EGT. Are any of the four cylinders likely to show a higher or lower EGT than the others in a pusher configuration? If there is not a lot of consistency or much difference between max and min, then it should not make that much difference which ones I monitor. I may end up drilling holes for EGTs in all four exhaust tubes and monitor them all selectively with a switch. Thanks in advance. -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a country badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272469#272469 ________________________________ Message 5 _____________________________________ Time: 12:05:30 PM PST US Subject: Re: JabiruEngine-List: Bing 94 carb question From: zeprep251@aol.com Thom, Looks like the bottom of the tube has had a taper machined on it,like you would do to assist pressing it into the carb body. G.Aman -----Original Message----- From: Thom Riddle Sent: Thu, Nov 12, 2009 10:05 am Subject: JabiruEngine-List: Bing 94 carb question > I recently dissasembled, inspected and cleaned the Bing 94 carb on my Jabi ru 2200A #1574. All is well after 240 hours. Yesterday, I did the same for a customer's carb from Jabiru 2200A #2058. It is in great shape but I found one anomaly (or so it seems to me) and would li ke to find out if any of your Bing 94 carbs have this same thing. In the brass tube that receives fuel from starting chamber in the float bowl (not the main jet area but the small diameter chamber at one corner) there is a tiny hole in the side of this brass tube about 3/16" below the top of the fuel bowl, and th us above the normal fuel level in the bowl. If this hole is not supposed to be there it could be contributing to the cold start problem he is having by allowing excess air to be drawn in and less than full rich fuel charge dur ing engine start. My question is this: Have any of you seen this tiny hole in the side of th e brass tube that picks up fuel in the start chamber? My Bing 94 does not ha ve this nor does any Bing 64 carb on which i've worked (lots of them). I spolke to Pete yesterday about this and he said he has never noticed thi s but would be looking at one of his carbs to see. I'd like to hear from any oth er Jabiru operators with Bing 94 carbs to see if this tiny hole is a manufact uring anomaly or "as designed" in the later engines. I've attached a photo of the carb with the hole I'm asking about. http://riddletr.googlepages.com/a%26pmechanix -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a co untry badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272443#272443 Attachments: http://forums.matronics.com//files/bing_94_starting_tube_hole_220.jpg ======================== =========== ======================== =========== ======================== =========== ======================== =========== ________________________________ Message 6 _____________________________________ Time: 12:17:13 PM PST US Subject: JabiruEngine-List: Re: Bing 94 carb question From: "Thom Riddle" Yes, Gary. I noticed that too. My guess is they make both ends tapered so that it does not matter which end is pickup by the robot that presses the other end into the base of the carb. Nothing is made by hand anymore.... other than our airplanes :-). -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a country badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272482#272482 ________________________________ Message 7 _____________________________________ Time: 01:20:25 PM PST US Subject: Re: JabiruEngine-List: Re: Bing 94 carb question From: zeprep251@aol.com Just thought the hole would be below the float level if it were reversed. -----Original Message----- From: Thom Riddle Sent: Thu, Nov 12, 2009 3:16 pm Subject: JabiruEngine-List: Re: Bing 94 carb question > Yes, Gary. I noticed that too. My guess is they make both ends tapered so that it does not matter which end is pickup by the robot that presses the other end into the base of the carb. Nothing is made by hand anymore.... other than our airplanes :-). -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 In a country well governed, poverty is something to be ashamed of. In a co untry badly governed, wealth is something to be ashamed of. - Confuscious Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272482#272482 ======================== =========== ======================== =========== ======================== =========== ======================== =========== ________________________________ Message 8 _____________________________________ Time: 01:33:53 PM PST US Subject: JabiruEngine-List: Re: Bing 94 carb question From: "Thom Riddle" Now that I know that this one carb is not the only one with this hole, I must assume that it is there by design and performs some desirable function. Since it is above the fuel level its purpose must be to allow some air to be drawn in along with the fuel in the starting chamber, in effect either leaning it somewhat or perhaps it helps to aerate or atomize it a bit. Only the Bing engineers will know the real reason it is there. My thoughts are pure speculation. -------- Thom Riddle Buffalo, NY Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x31 "Rules are for the guidance of wise men and the obedience of fools." - Pablo Mason Read this topic online here: http://forums.matronics.com/viewtopic.php?p=272495#272495 ________________________________ Message 9 _____________________________________ Time: 01:44:00 PM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: Re: Bing 94 carb question The Bing that was once on my engine (#2062) also has this hole, for what it's worth. Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062, 814.7 hrs Countdown to 1000 hrs~185 to go Sensenich 62"x46" Wood prop Electroair direct-fire ignition system Rotec TBI-40 injection Status: flying (and learning) do not archive On Nov 12, 2009, at 4:33 PM, Thom Riddle wrote: > > > Now that I know that this one carb is not the only one with this > hole, I must assume that it is there by design and performs some > desirable function. Since it is above the fuel level its purpose > must be to allow some air to be drawn in along with the fuel in the > starting chamber, in effect either leaning it somewhat or perhaps > it helps to aerate or atomize it a bit. Only the Bing engineers > will know the real reason it is there. My thoughts are pure > speculation. > > -------- > Thom Riddle > Buffalo, NY > Kolb Slingshot SS-021 > Jabiru 2200A #1574 > Tennessee Prop 64x31 > > "Rules are for the guidance of wise men and the obedience of > fools." > - Pablo Mason > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=272495#272495 > > ________________________________ Message 10 ____________________________________ Time: 06:25:09 PM PST US From: Deb and Peter Zweck Subject: Re: JabiruEngine-List: Re: Bing 94 carb question I have seen these holes above fuel level on many carbs and yes, it is to aerate the fuel to assist in vaporisation. Cheers, Peter On 13/11/09 08:33, Thom Riddle wrote: > --> JabiruEngine-List message posted by: "Thom Riddle" > > Now that I know that this one carb is not the only one with this hole, I must assume that it is there by design and performs some desirable function. Since it is above the fuel level its purpose must be to allow some air to be drawn in along with the fuel in the starting chamber, in effect either leaning it somewhat or perhaps it helps to aerate or atomize it a bit. Only the Bing engineers will know the real reason it is there. My thoughts are pure speculation. > > -------- > Thom Riddle > Buffalo, NY > Kolb Slingshot SS-021 > Jabiru 2200A #1574 > Tennessee Prop 64x31 > > "Rules are for the guidance of wise men and the obedience of fools." > - Pablo Mason > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=272495#272495 > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.