Today's Message Index:
----------------------
1. 01:05 AM - Re: Re: Oil problem (James, Clive R)
2. 02:09 AM - Re: Oil problem (jetboy)
3. 07:26 AM - Re: Re: Oil problem (pj.ladd)
4. 07:37 AM - Bing WOT ? (dons701)
5. 07:48 AM - Re: Oil problem (dons701)
6. 08:17 AM - Re: Bing WOT ? (Pete Krotje)
7. 09:37 AM - Re: Oil problem (Thom Riddle)
8. 09:38 AM - Re: Oil problem (Thom Riddle)
9. 09:41 AM - Re: Oil problem (Thom Riddle)
10. 02:22 PM - Re: Bing WOT ? (Peter Harris)
11. 09:24 PM - Re: Bing WOT ? (dons701)
Message 1
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Pat, I can't picture where the exhaust is near the sender?
There are two tapping's on my engines and neither is anywhere near the
exhaust.
Am I missing something?
Regards, Clive
2200 Jab SP
3300 Esqual LS
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
pj.ladd
Sent: 24 September 2009 15:50
Subject: Re: JabiruEngine-List: Re: Oil problem
--> <pj.ladd@btinternet.com>
using a tee under the electric sender. >>
Hi Don,
that would seem a practical solution. Unfortunately the gap between the
VDO and part of the exhaust is just about enough to unscrew the VDO.
Certainly not enough to introduce another fitting.. I am not saying that
it cant be done but I suspect that I would finish up with a Christmas
Tree of fittings probably starting with a 90 degree bend to clear the
exhaust. We will see.
Maybe my slight re arrangement of the exhast will sove the problem. Roll
on the next opportunity to fly and test.
Thanks for your suggestions everybody
Pat
Message 2
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My original sender failed at around 150 hrs and was replaced with a genuine VDO
but placed in the lower port, the one that points directly ahead. I opened up
the original and the thin wire resistance coil inside had worn through.
I fitted a low pressure warning switch to the upper port, as backup.
>From an engine health point of view, the lower port is at the main gallery and
is the best one to monitor oil pressure delivered to the engine. It reads about
7 psi lower. Why the original sender measures blocked oil filters and pulsations
from the pump is a mystery.
If you have a hydraulic lifter engine and change the relief valve washers it can
get expensive.
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264891#264891
Message 3
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Pat, I can't picture where the exhaust is near the sender?
Hi Clive
I am not surprised. It is a pusher installation with a very convoluted
exhaust array with two vertical pipes (among other things). One of them just
to the rear of the VDO and justs clears it. In fact it is so close it is a
difficult job to get enough clearance to change the VDO.
As I said in my previous post The exhaust had moved slightly. Just enough to
make physical contact with the topedge of the VDO.
I pulled the exhaust to the rear and was able to rebolt it to give about
1/4 inch clearasnce. I flew this morning for an hour and the oil pressure
went to 350 kpa immediately at start up. It dropped to 230 within 6 minutes,
about take off time, and remained at 200/230 kph until I landed so it seems
that the problem is solved as 230kph puts the on the top edge of the yellow
segment on the instrument..
Just for the record this was at 2800 rpm which produces 70 mph.
Once again thanks to everyone for their suggestions.
Cheers
Pat
Message 4
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Hello All'
Had my carb off the other day and noticed that the throttle plate, with the throttle
arm full open to the stop, was not completely open. If I were to guess,
I would say 5 to 7 degrees from being completely wide open. What is interesting,
did Bing or Jabiru intend this to have a slight directional effect towards
the roof of the intake plenum?? I say this because there is not much distance
between carb and plenum divider and it could have been used to keep the heavier
fuel droplets suspended higher in the airstream. Or, this was a mistake to
be corrected by carefully adjusting the throttle stop for a straight shot. The
other option of course is to leave it alone as the engine runs fine with 2950
RPM turning a 64 inch prop, but many small refinements can make a noticeable
difference. Any one else notice this ???
Thanks in advance, Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264924#264924
Message 5
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Good! It does make sense as the sender works by resistance and intense heat could
make the difference. Perhaps some insulating header wrap or sleeving could
ensure reliability, if there is room that is !!
Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264925#264925
Message 6
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Per Bing specifications the max flow through the carb happens with the
butterfly open 78 to 80 degrees. Going to 90 degrees exposes the cross rod
to the airflow, creates turbulence and slows the slow through the carb.
That's why the throttle arm has a restriction to about 80 degrees open.
Pete
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of dons701
Sent: Friday, September 25, 2009 9:37 AM
Subject: JabiruEngine-List: Bing WOT ?
Hello All'
Had my carb off the other day and noticed that the throttle plate, with
the throttle arm full open to the stop, was not completely open. If I were
to guess, I would say 5 to 7 degrees from being completely wide open. What
is interesting, did Bing or Jabiru intend this to have a slight directional
effect towards the roof of the intake plenum?? I say this because there is
not much distance between carb and plenum divider and it could have been
used to keep the heavier fuel droplets suspended higher in the airstream.
Or, this was a mistake to be corrected by carefully adjusting the throttle
stop for a straight shot. The other option of course is to leave it alone as
the engine runs fine with 2950 RPM turning a 64 inch prop, but many small
refinements can make a noticeable difference. Any one else notice this ???
Thanks in advance, Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264924#264924
Message 7
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Pat,
You must have a different sort of exhaust system on your Jabiru than I have. I
wouldn't doubt it since your noise regulations are stricter than ours in the USA.
Attached is a photo of the right rear quarter of my Slingshot. It is high
enough resolution that you can zoom in for more detail. What you can't see because
it is hidden by the prop, is the oil pressure sending unit (VDO). It is mounted
above the base of the oil filter on a Tee with a hard copper line to the
mechanical oil pressure gage and the electrical signal going to the EIS. As
you can see, the exhaust sy
--------
Thom Riddle
Buffalo, NY
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x34
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264956#264956
Message 8
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accidently hit return key,
....As you can see, the exhaust system is not in play with the VDO oil pressure
sender. Do you happen to have a photo of your exhaust system installed? I'm curious
about how convoluted it might be to get the silencing results required
in the UK.
--------
Thom Riddle
Buffalo, NY
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x34
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264957#264957
Message 9
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Senior moment again. I forgot to attach the photo. Here it is.
--------
Thom Riddle
Buffalo, NY
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x34
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264958#264958
Attachments:
http://forums.matronics.com//files/jabiru_engine_rt_rear_153.jpg
Message 10
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Don,
The slightly displaced butterfly will keep the charge turbulating.
When fully open the reduced turbulence allows the heavier fuel droplets to
pass through the induction collector to the end where #1 and #2 get too
rich.
Peter
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of dons701
Sent: Saturday, 26 September 2009 12:37 AM
Subject: JabiruEngine-List: Bing WOT ?
Hello All'
Had my carb off the other day and noticed that the throttle plate, with
the throttle arm full open to the stop, was not completely open. If I were
to guess, I would say 5 to 7 degrees from being completely wide open. What
is interesting, did Bing or Jabiru intend this to have a slight directional
effect towards the roof of the intake plenum?? I say this because there is
not much distance between carb and plenum divider and it could have been
used to keep the heavier fuel droplets suspended higher in the airstream.
Or, this was a mistake to be corrected by carefully adjusting the throttle
stop for a straight shot. The other option of course is to leave it alone as
the engine runs fine with 2950 RPM turning a 64 inch prop, but many small
refinements can make a noticeable difference. Any one else notice this ???
Thanks in advance, Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264924#264924
Checked by AVG - www.avg.com
18:00:00
Message 11
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Thanks Pete and Peter, knowledge is a wonderful thing. I'm shure others will find
this interesting.
Don
--------
Zenith 701 #76120
Jabiru 2200A #2456 55 hours
Sensenich Wood 64-PJ-36 Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=265073#265073
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