Today's Message Index:
----------------------
1. 10:55 AM - Econo jetting (gary aman)
2. 01:47 PM - Re: Econo jetting (jetboy)
3. 02:33 PM - Re: Re: Econo jetting (Lynn Matteson)
4. 03:22 PM - Re: Re: Econo jetting (gary aman)
5. 05:23 PM - Re: Distributor cap and rotor...off topic (Noel Loveys)
6. 07:42 PM - Re: Distributor cap and rotor...off topic (Lynn Matteson)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
I think the last person to respond to my inquiry was Pete.Based on that assumption
I would pose this question.2200 tuning info on line suggests 45 idle jet,250
main jet.276 needle jet and jabiru special needle.The markings on my main jet
indicate 175,along with some etched symbols I can't identify.Any chance the
factory rebored this 175 to make it a 250?The hole in this jet is .089
Thanks G.Aman
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Econo jetting |
Hi,
you should download the current information JSL 002-2 april 2007 standard
parts are idle jet .35mm needle jet 2.85mm main jet 2.25mm with the revised needle
pt. no. 4A131AOD.
I dont know if the previous needle is compatible with this latest revision,
I've had no problems in drilling out my earlier econo jets with metric drills of
those sizes although an EGT audit afterwards showed that in cruise my mixture
was over rich so I put back an original 2.76 needle jet to get the target readings.
Problems with routing of carb vent line or air intake to the carb will make a difference
to tuning so be sure they are correct first.
Ralph
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=140798#140798
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Econo jetting |
That information, (JSL 002) has been "superseded" (my choice of a
word) by JSB 018-1. According to JSB 018-1 paragraph 2.2:
"Accordingly Service Letter JSB 002 has been cancelled and this
Service Bulletin issued in it's place."
I don't know what constitutes a Service Letter versus a Service
Bulletin, and it's apparent Jabiru doesn't either because they
interchange them at will, but that's what came down the pipeline just
recently...October 5, 2007, according to the download that I have.
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/420+ hrs
On Oct 19, 2007, at 4:46 PM, jetboy wrote:
> <sanson.r@xtra.co.nz>
>
> Hi,
> you should download the current information JSL 002-2 april
> 2007 standard parts are idle jet .35mm needle jet 2.85mm main jet
> 2.25mm with the revised needle pt. no. 4A131AOD.
>
> I dont know if the previous needle is compatible with this latest
> revision,
>
> I've had no problems in drilling out my earlier econo jets with
> metric drills of those sizes although an EGT audit afterwards
> showed that in cruise my mixture was over rich so I put back an
> original 2.76 needle jet to get the target readings.
>
> Problems with routing of carb vent line or air intake to the carb
> will make a difference to tuning so be sure they are correct first.
>
> Ralph
>
> --------
> Ralph - CH701 / 2200a
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Econo jetting |
Ralph,
Thanks,I had an older copy of the first econo kit and not everything matched
up. A little easier to tune with bing parts,but we can handle it.Thanks again
G.Aman
Hi,
you should download the current information JSL 002-2 april 2007 standard
parts are idle jet .35mm needle jet 2.85mm main jet 2.25mm with the revised needle
pt. no. 4A131AOD.
I dont know if the previous needle is compatible with this latest revision,
I've had no problems in drilling out my earlier econo jets with metric drills of
those sizes although an EGT audit afterwards showed that in cruise my mixture
was over rich so I put back an original 2.76 needle jet to get the target readings.
Problems with routing of carb vent line or air intake to the carb will make a difference
to tuning so be sure they are correct first.
Ralph
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=140798#140798
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Distributor cap and rotor...off topic |
That's Ok .... I forgot a bout the prop..... One of those things about
being inside the plane when the engine is running. I still hate ducking
under the boom of a chopper during run up... The little voice keeps telling
me to walk around the front and be seen. Crawling up to check something
under the cowl with the rotors turning doesn't bother me at all. If some
one yells "Duck!" I won't look up and say "Where?"
As for the tail rotor That is really the most dangerous part!
Noel
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On
> Behalf Of Lynn Matteson
> Sent: Friday, October 19, 2007 2:22 AM
> To: jabiruengine-list@matronics.com
> Subject: Re: JabiruEngine-List: Distributor cap and rotor...off topic
>
>
> <lynnmatt@jps.net>
>
> I thought about doing all those photographic methods, Noel, but the
> thought of waiting until dark or having a light-excluding blanket
> thrown over the engine wasn't very appealing,with the prop sixteen
> inches away from my left shoulder. Setting up a tripod, or rigging a
> camera support wasn't exactly on my list of fun projects for the day
> either. As it was, I had the plane strapped from going anywhere, was
> doing all the starting and engine controls by myself, and not
> mentioning that there was a little wind being generated by the prop.
> I guess somewhere along the way...after I retired...I became more of
> an aircraft person, and less of a photographer. : )
>
> Lynn
> On Oct 18, 2007, at 7:38 PM, Noel Loveys wrote:
>
> > <noelloveys@yahoo.ca>
> >
> > I'd just use a long exposure... No other light except what is
> > caused by the
> > spark. 1/4 sec on manual should give an excellent result.
> For higher
> > shutter speeds just rev the engine a bit before firing the
> > shutter. @ 2000
> > rpm each terminal should fire 1000 times a minute or 16 times a
> > second a
> > shutter speed of 1/8 sec should produce 1 spark 50 % of the time
> > and 2 over
> > lapping sparks the other 50% of the time. You then only have to
> > experiment
> > with the aperture to get a pleasing result. BTW the
> probability of
> > getting
> > a single spark at 1/90sec is approximately 1: 5.6 @2000rpm.
> >
> > But you were using a digital camera which has a delay between the
> > trigger
> > and the actual capture ( being careful not to mention shutter)
> > That now
> > reduces things to chance until the capture duration is
> sufficiently
> > long
> > enough to see one or more sparks.
> >
> > I used to do "Photo Painting " That is where I would set
> up inside a
> > totally dark room and fire one small flash several times from
> > different
> > angles and distances to attain a specific lighting pattern.
> I also
> > used it
> > to do things like the ball in a cigar box... With a bit of
> work it
> > was easy
> > to make a good quality model car look like the real thing.
> > Noel
> >
> >> -----Original Message-----
> >> From: owner-jabiruengine-list-server@matronics.com
> >> [mailto:owner-jabiruengine-list-server@matronics.com] On
> >> Behalf Of Lynn Matteson
> >> Sent: Thursday, October 18, 2007 7:40 PM
> >> To: jabiruengine-list@matronics.com
> >> Subject: Re: JabiruEngine-List: Distributor cap and
> rotor...off topic
> >>
> >>
> >> <lynnmatt@jps.net>
> >>
> >> Ok, Rob, I'll settle for "highly skilled, trained, etc" for
> >> lucky. : ) But remember, there's the other 330 degrees of
> >> that circle
> >> that I DIDN'T manage to capture, and that's what all the
> other shots
> >> show...nothing.
> >> I suppose if I had really wanted to stop the action cold, I could
> >> have rigged a trigger of some sort that would have fired
> the shutter
> >> at a point just prior to the rotor lining up with the cap segment,
> >> but I never got into those kind of electronic triggers in my 20+
> >> years as a photographer.
> >>
> >> Lynn
> >>
> >> On Oct 18, 2007, at 4:17 PM, Noel Loveys wrote:
> >>
> >>> <noelloveys@yahoo.ca>
> >>>
> >>> Lynn do you want to tell him what you did for a living or
> can I :-)
> >>>
> >>> Noel
> >>>
> >>>> -----Original Message-----
> >>>> From: owner-jabiruengine-list-server@matronics.com
> >>>> [mailto:owner-jabiruengine-list-server@matronics.com] On
> >>>> Behalf Of Rob Turk
> >>>> Sent: Thursday, October 18, 2007 4:15 PM
> >>>> To: jabiruengine-list@matronics.com
> >>>> Subject: Re: JabiruEngine-List: Distributor cap and
> >> rotor...off topic
> >>>>
> >>>>
> >>>> <matronics@rtist.nl>
> >>>>
> >>>> Hi Lynn,
> >>>>
> >>>> Impressive picture, funny to see how this works internally.
> >>>> However, I don't
> >>>> think catching the spark is as much of a lucky shot as you
> >>>> think. With the
> >>>> shutter open for 1/90th of a second, it records everything
> >>>> for 1/90th of a
> >>>> second. This includes the 30 degrees of moving rotor (hence
> >>>> the blur), and
> >>>> also the instant moment that the spark occurs even if that
> >> is just a
> >>>> microsecond.
> >>>>
> >>>> Best regards,
> >>>> Rob
> >>>>
> >>>> ----- Original Message -----
> >>>> From: "Lynn Matteson" <lynnmatt@jps.net>
> >>>> To: <jabiruengine-list@matronics.com>
> >>>> Sent: Thursday, October 18, 2007 3:03 PM
> >>>> Subject: JabiruEngine-List: Distributor cap and rotor...off topic
> >>>>
> >>>>
> >>>>> The first two times I tried to send this it bounced
> back with the
> >>>>> claim that it was too big so I cropped it down and now
> >> I'm adding a
> >>>>> 'file name' to further satisfy Matronics requirements. If
> >> it doesn't
> >>>>> go this time, I'm giving up...
> >>>>>> To follow up on the distributor cut-away picture, I just
> >> looked at
> >>>>>> my picture info...here 'tis:
> >>>>>>
> >>>>>> shutter speed 1/90 sec.
> >>>>>> ISO 200
> >>>>>> f/2.8
> >>>>>> focal length 6.7mm
> >>>>>> I had set the camera to "sports action" The camera is a
> >> Kodak Easy
> >>>>>> Share DX6490
> >>>>
> >>>>
> >>>> --------------------------------------------------------------
> >>>> ------------------
> >>>>
> >>>>
> >>>>>> Pete asked to see the picture I took, and I sent it
> his way. I'm
> >>>>>> (attempting to) posting it now and we'll see if it
> flies. : ) The
> >>>>>> shutter speed vs idle speed calculations work out like
> this: idle
> >>>>>> speed of (say) 900rpm divided by 60 sec = 15 rps crank speed
> >>>>>> divided by 2 = 7.5 rps cam (or distributor) speed times
> >> 360 degrees
> >>>>>> = 2700 degrees of rotation divided by 90 (1/90 shutter
> >> speed) = 30
> >>>>>> degrees of rotation during which the shutter fired. Now I ask
> >>>>>> you...how lucky was I to get the rotor in just the
> exact position
> >>>>>> to see the exact time that the spark fired? DAMN
> lucky, I'd say.
> >>>>>> And I just went back and checked, and I had only made
> 6 shots, of
> >>>>>> which this shot was number 4, so that makes it even more of a
> >>>>>> "lucky dog" shot...to borrow a phrase from NASCAR. : )
> >>>>>>
> >>>>>> Maybe somebody knows the speed of the spark as it occurs in a
> >>>>>> internal combustion engine, I don't. But given a pretty short
> >>>>>> duration, that makes this shot even more lucky.
> >>>>>>
> >>>>>> Lynn Matteson
> >>>>>> Grass Lake, Michigan
> >>>>>> Kitfox IV Speedster w/Jabiru 2200
> >>>>>> flying w/420+ hrs
> >>>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Distributor cap and rotor...off topic |
Whenever I'm running my engine, even thought I can hear it, I keep
saying out loud "the prop is turning, the engine is running, the prop
is turning...", lest I lapse into stupidity, and walk into it.
While shooting the distributor shots, I had intended to have a fire
extinguisher on hand, outside the plane (besides the one strapped
onto the console) in case the open sparks decided to ignite any fumes
that might be lurking around the vicinity of the carburetor, but I
forgot to do this. I'll just bet that any sudden fire that might have
erupted would have been reason enough to celebrate by flailing ones
arms about the vicinity of the prop circle. : ) Thank God this didn't
happen.
Tail rotors...yikes!
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/420+ hrs
On Oct 19, 2007, at 8:23 PM, Noel Loveys wrote:
> <noelloveys@yahoo.ca>
>
> That's Ok .... I forgot a bout the prop..... One of those things
> about
> being inside the plane when the engine is running. I still hate
> ducking
> under the boom of a chopper during run up... The little voice
> keeps telling
> me to walk around the front and be seen. Crawling up to check
> something
> under the cowl with the rotors turning doesn't bother me at all.
> If some
> one yells "Duck!" I won't look up and say "Where?"
>
> As for the tail rotor That is really the most dangerous part!
>
> Noel
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|