Today's Message Index:
----------------------
1. 06:29 AM - Re: Factory tested ?? (DaveG601XL)
2. 09:02 AM - Re: Factory tested ?? (japhillipsga@aol.com)
3. 10:53 AM - Re: Re: Factory tested ?? (Ivan)
4. 11:19 AM - Prop RPM (BobbyPaulk@COMCAST.NET)
5. 11:31 AM - Re: Re: Factory tested ?? (=?iso-8859-1?Q?J=E9rme_Delamare?=)
6. 11:35 AM - Re: Re: Factory tested ?? (Ivan)
7. 11:45 AM - Re: Factory tested ?? (DaveG601XL)
8. 11:56 AM - Re: Re: Factory tested ?? (Ivan)
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 |
|
| Subject: | Re: Factory tested ?? |
Ivan,
Ground static and max in-flight RPM's do not guarantee that you have the right
size jets for correct mixture. Although, being way off the correct mixture will
likely cause you to fall short of any RPM targets you have.
Jet sizes aside for now, your static RPM will vary greatly depending on your prop.
I have the Senenich wooden W64ZK49 prop in my 601XL and it gives me a static
RPM around 2650. Max level flight RPM is around 3150. Other people with
the same airframe/prop/engine combination get different results due to the inherent
variations.
For in-flight confirmation of mixtures, having EGT information is very helpful.
The Jabiru factory documentation says that the EGT target for takeoff is 1184F
and the cruise target is 1256F. If I remember, Pete from Jabiru recommends
takeoff EGT's in the 1200-1250 F range and cruise EGT's in the 1350-1400F range.
Depending on whether you are above or below these targets will tell you that
you need to lean or richen your mixture.
The variation between cylinders will confuse the matter a bit as you may see some
cylinders will be above the target and some will be below it. I have spent
a good part of my phase I flight test period trying to find the 'sweet spot.'
Good luck,
--------
David Gallagher
601 XL, first flight 7/24/08.
In Phase I flight test.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 8874#208874
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: Factory tested ?? |
Al, I was told that the 3300 I bought was "run in" already and did not requi
re a breakin period. Bill
-----Original Message-----
From: Iberplanes IGL <iberplanes@gmail.com>
Sent: Mon, 13 Oct 2008 12:11 pm
Subject: JabiruEngine-List: Factory tested ??
Hello gang,
do we know for sure if our jabirus are factory tested? I=C2=B4ve removed one
spark plug per cylinder in order to spray it with oil=C2- to keep it OK f
or my long term storage and i=C2=B4ve founded dirty as if the were used. Any
one with the same case here?
many thanks ,
--
Alberto Martin
www.iberplanes.es
Igualada - Barcelona - Spain
----------------------------------------------
Zodiac 601 XL Builder
Serial: 6-7011
Tail Kit: Finished
Wings: Not Started
Fuselage: Ordered
Engine: Jabiru 3300
-= - The JabiruEngine-List Email Forum -
-= Use the Matronics List Features Navigator to browse
-= the many List utilities such as List Un/Subscription,
-= Archive Search & Download, 7-Day Browse, Chat, FAQ,
-= Photoshare, and much much more:
-= --> http://www.matronics.com/Navigator?JabiruEngine-List
-========================
-= - MATRONICS WEB FORUMS -
-= Same great content also available via the Web F
orums!
-= --> http://forums.matronics.com
-========================
-= - List Contribution Web Site -
-= Thank you for your generous support!
-= -Matt Dralle, List Admin.
-= --> http://www.matronics.com/contribution
-========================
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: Factory tested ?? |
Dave
Thanks for the info. My carb tuning and jets should be just perfect since
they were tuned at the factory with no problem. So the only variable now is
geting the prop pitch just right again as it was before it was removed to
perform maintenance. I got my target RPM's from the SB on the "Economy
tuning."
By "sweet spot" do you mean peak EGT?
Thanks
Ivan
----- Original Message -----
From: "DaveG601XL" <david.m.gallagher@ge.com>
Sent: Wednesday, October 15, 2008 6:28 AM
Subject: JabiruEngine-List: Re: Factory tested ??
> <david.m.gallagher@ge.com>
>
> Ivan,
>
> Ground static and max in-flight RPM's do not guarantee that you have the
> right size jets for correct mixture. Although, being way off the correct
> mixture will likely cause you to fall short of any RPM targets you have.
>
> Jet sizes aside for now, your static RPM will vary greatly depending on
> your prop. I have the Senenich wooden W64ZK49 prop in my 601XL and it
> gives me a static RPM around 2650. Max level flight RPM is around 3150.
> Other people with the same airframe/prop/engine combination get different
> results due to the inherent variations.
>
> For in-flight confirmation of mixtures, having EGT information is very
> helpful. The Jabiru factory documentation says that the EGT target for
> takeoff is 1184F and the cruise target is 1256F. If I remember, Pete from
> Jabiru recommends takeoff EGT's in the 1200-1250 F range and cruise EGT's
> in the 1350-1400F range. Depending on whether you are above or below
> these targets will tell you that you need to lean or richen your mixture.
>
> The variation between cylinders will confuse the matter a bit as you may
> see some cylinders will be above the target and some will be below it. I
> have spent a good part of my phase I flight test period trying to find the
> 'sweet spot.'
>
> Good luck,
>
> --------
> David Gallagher
> 601 XL, first flight 7/24/08.
> In Phase I flight test.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 8874#208874
>
>
>
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 |
|
DO NOT ARCHIVE
my prop on a 601 XL will only turn 2450 to 2500 Static depending on temperature
and density altitude.
it will turn 3350 which is about 50 over redline in straight and level cruise at
1,000' MSL i would think you would want to just touch redline or a tad over
at full throttle and level.
if you turn 2800 static on a fast aircraft you will surely go by the redline at
a fast cruise. you buy a prop for the speed of the aircraft so it can cruise
in the power band ( normally 75% ) of the engines rated power.
N131BP
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: | Re: Factory tested ?? |
Ivan,
Depending on the serial number of your engine, I am not so sure that the
factory tuning is "just perfect".
You should follow the service bulletin : JSB018-1 Engine Tuning
Jrme
.../My carb tuning and jets should be just perfect since
they were tuned at the factory with no problem/...
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: Factory tested ?? |
I understand. My serial number engine came complete with the "economy
tuning kit" installed. This was confirmed by Pete.
thanks
Ivan
----- Original Message -----
From: "Jrme Delamare" <jeromedelamare@free.fr>
Sent: Wednesday, October 15, 2008 11:29 AM
Subject: RE: JabiruEngine-List: Re: Factory tested ??
=?iso-8859-1?Q?J=E9rme_Delamare?= <jeromedelamare@free.fr>
Ivan,
Depending on the serial number of your engine, I am not so sure that the
factory tuning is "just perfect".
You should follow the service bulletin : JSB018-1 Engine Tuning
Jrme
.../My carb tuning and jets should be just perfect since
they were tuned at the factory with no problem/...
Message 7
| 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: Factory tested ?? |
Ivan,
If you say your jets were tuned at the factory, then I guess you are flying a Jabiru
airplane. (I do not know what you have) The jets that Jabiru installs
onn the production line are meant to work the best for their Jabiru airframes
and may, or may not, be optimum for other installations. When they built my 3300
engine, they did not know what type of airplane it would go in. As it happens,
I put it in a Zodiac 601XL with a fixed pitch wooden prop. In this application,
the load that the engine sees in flight is much different than on a Jabiru
airframe. As Pete at Jabiru USA said up front, and I have confirmed through
flight testing, the jets in my 3300 engine were too large (rich). I have
had to go down one size in both the main and needle jets to get the right mixture.
As to finding the 'sweet spot,' that is too complex a discussion to just attach
to this thread. The 601XL installation has all sorts of turbulent airflow into
the carb which causes all sorts of variability in mixture to the individual
cylinders. I am close to publishing the results of my testing in a separate
post in the near future.
Good luck,
--------
David Gallagher
601 XL, first flight 7/24/08.
In Phase I flight test.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 8923#208923
Message 8
| 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: Factory tested ?? |
Thanks Dave,
Sorry I did not mention that my application is an S-LSA J-250. All was set
at the factory. I had to have my prop removed so when it was placed back on
the Sensenich ground adjustable pitch is not exactly as it was before. I
put a mark on the dial before removing it but the numbers are so close that
even a bit off changes the pitch-RPM a lot. I so have RPM figures from hours
of flying so I am just trying to match those again which did just fine for
the plane as set at the factory.
Thanks
Ivan
----- Original Message -----
From: "DaveG601XL" <david.m.gallagher@ge.com>
Sent: Wednesday, October 15, 2008 11:45 AM
Subject: JabiruEngine-List: Re: Factory tested ??
> <david.m.gallagher@ge.com>
>
> Ivan,
>
> If you say your jets were tuned at the factory, then I guess you are
> flying a Jabiru airplane. (I do not know what you have) The jets that
> Jabiru installs onn the production line are meant to work the best for
> their Jabiru airframes and may, or may not, be optimum for other
> installations. When they built my 3300 engine, they did not know what
> type of airplane it would go in. As it happens, I put it in a Zodiac
> 601XL with a fixed pitch wooden prop. In this application, the load that
> the engine sees in flight is much different than on a Jabiru airframe. As
> Pete at Jabiru USA said up front, and I have confirmed through flight
> testing, the jets in my 3300 engine were too large (rich). I have had to
> go down one size in both the main and needle jets to get the right
> mixture.
>
> As to finding the 'sweet spot,' that is too complex a discussion to just
> attach to this thread. The 601XL installation has all sorts of turbulent
> airflow into the carb which causes all sorts of variability in mixture to
> the individual cylinders. I am close to publishing the results of my
> testing in a separate post in the near future.
>
> Good luck,
>
> --------
> David Gallagher
> 601 XL, first flight 7/24/08.
> In Phase I flight test.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 8923#208923
>
>
>
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! --
|