Today's Message Index:
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1. 02:14 AM - Re: Bing 64 Idle circuit inlet aperture drilling 3300A (Thruster87)
2. 02:34 AM - Re: Re: Bing 64 Idle circuit inlet aperture drilling 3300A (Martin Hone)
3. 02:55 AM - Re: Re: Bing 64 Idle circuit inlet aperture drilling 3300A (James, Clive R)
4. 12:04 PM - Re: Bing main jet air bleed orifice size. (Martin Hone)
5. 07:18 PM - Re: Bing 64 Idle circuit inlet aperture drilling 3300A (Thruster87)
6. 11:25 PM - Re: Re: Bing 64 Idle circuit inlet aperture drilling 3300A (James, Clive R)
Message 1
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| Subject: | Re: Bing 64 Idle circuit inlet aperture drilling 3300A |
Spoke to the people at Jabiru today and in their testing, screwing the mixture
in or out made very little difference to the engine operation.They are a bit baffled
by the surging.They advised the things to check are ,any balance tube obstructions,float
levels, maybe drop the float 1-2mm so will check these out next.
Cheers T87
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=363972#363972
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| Subject: | Re: Bing 64 Idle circuit inlet aperture drilling |
3300A
Why doesn't that surprise me.
Anyway, the point of drilling out the idle airbleed in the first place is
so that we can get the idle mixture system working. If you cannot get the
engine to respond via turning the idle mixture screw all the way in , then
say 3 turns out, then we have one of two scenarios....
1. You need to go to a larger pilot jet (my preference)
2. It is not mixture related, at least not in the area we are playing with.
Marty
On Mon, Jan 16, 2012 at 8:11 PM, Thruster87 <alania@optusnet.com.au> wrote:
> alania@optusnet.com.au>
>
> Spoke to the people at Jabiru today and in their testing, screwing the
> mixture in or out made very little difference to the engine operation.They
> are a bit baffled by the surging.They advised the things to check are ,any
> balance tube obstructions,float levels, maybe drop the float 1-2mm so will
> check these out next. Cheers T87
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=363972#363972
>
>
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| Subject: | Re: Bing 64 Idle circuit inlet aperture drilling |
3300A
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| Subject: | Re: Bing main jet air bleed orifice size. |
Hi Don,
Yes, I have made that mod as well. I think it came out of the African
guys. I can't say that I noticed much of a difference, other than the
plugs all read much the same after the mod, so I think the mixture
distribution was improved due to better atomisation and temps were more
even. So I guess you could say it worked !
Martin
> Hi Martin
> On the Matronics forum you recently mentioned that the main air bleed
> should be opened to 3/16". Any idea if this is what they are doing at the
> South African Jabiru dealer to improve fuel and air mixing?? They have
> there own service bulletin on this, as seen on the Avcom forum. Have you
> tried this bleed increase ??
> I recently drilled the idle air bleed to the 1.6 mm spec with good
> results, ( along with new O rings).
> Thanks, Don
>
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| Subject: | Re: Bing 64 Idle circuit inlet aperture drilling 3300A |
I have not really had a chance to play around with the throttle while concentrating
on flying other then pushing the throttle [back over 2000rpm] in so as not
to stall it and then once on short final going to idle and been high enough
to clear the fence as the engine stalls.Once on the runway I put a 1/8" throttle
on and it starts and purrs just as it should and taxi back to hangar .Local
glider pilot CFI has recommended me for the silver gliding star award. The
other strange thing was just before Xmas I did my BFR with stalling etc at 4500
ft with no engine problems other then once on short final it stalled but
this time the CFI hit the starter button and I just concentrated on the landing
phase as normal once the engine started again. Cheers Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=364060#364060
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| Subject: | Re: Bing 64 Idle circuit inlet aperture drilling |
3300A
Alan, full marks for your perseverance in the air with a problem that
would leave some on the ground.
What's the fuel supply set up?. In a Thruster I assume you still have
mechanical and electric pumps?
As the engine works fine through most of the envelope it is indeed a
tricky one.
Your mention of 4500 , for testing setting up an approach at height?
IE simulate the approach at 4000 feet or so you can feel around to see
what has an effect with plenty of time to get her going again.
So, throttle closed and descending we are on the idle system and there
is assistance from the windmill effect but then she stops.
How long does it take to come on?
Is it every time you adopt the approach set up?
Do you have carb heat? If so do you always put it on? What happens if
you don't? Is it carb ice conditions (check the graph)
What revs sustains the engine? Does your plane have the kamikaze dive
approach angle? (flying brick, nose down) or is it a newer one
Just thinking out loud.....
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
Thruster87
Sent: 17 January 2012 03:16
Subject: JabiruEngine-List: Re: Bing 64 Idle circuit inlet aperture
drilling 3300A
--> <alania@optusnet.com.au>
I have not really had a chance to play around with the throttle while
concentrating on flying other then pushing the throttle [back over
2000rpm] in so as not to stall it and then once on short final going to
idle and been high enough to clear the fence as the engine stalls.Once
on the runway I put a 1/8" throttle on and it starts and purrs just as
it should and taxi back to hangar .Local glider pilot CFI has
recommended me for the silver gliding star award. The other strange
thing was just before Xmas I did my BFR with stalling etc at 4500 ft
with no engine problems other then once on short final it stalled but
this time the CFI hit the starter button and I just concentrated on
the landing phase as normal once the engine started again. Cheers Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=364060#364060
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