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Fuel Flow Transducer Move
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n223rv(at)wolflakeairport
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PostPosted: Wed Sep 23, 2009 6:01 pm    Post subject: Fuel Flow Transducer Move Reply with quote

For those that moved the fuel flow transducer between the servo and
the spider, how and where exactly did you mount it? Pictures would be
even better!

Thanks
-Mike Kraus
RV-4 Flying
RV-10 FWF and Wiring

Sent from my iPhone


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orchidman



Joined: 10 Jul 2006
Posts: 277
Location: Oklahoma City - KRCE

PostPosted: Thu Sep 24, 2009 3:31 am    Post subject: Re: Fuel Flow Transducer Move Reply with quote

n223rv(at)wolflakeairport wrote:
For those that moved the fuel flow transducer between the servo and
the spider, how and where exactly did you mount it? Pictures would be
even better!

Here is a link to a picture where I put mine. It is where AFS recommends putting it.
http://www.wingscc.com/N2GB/FF4-FuelSystem/100_3208.html


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Gary Blankenbiller
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Nick Leonard



Joined: 18 Jun 2007
Posts: 35
Location: Sacramento, CA

PostPosted: Thu Sep 24, 2009 8:05 am    Post subject: Re: Fuel Flow Transducer Move Reply with quote

As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested. Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?


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gengrumpy(at)aol.com
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PostPosted: Thu Sep 24, 2009 8:22 am    Post subject: Fuel Flow Transducer Move Reply with quote

Mine is mounted on the firewall, and my readings fluctuate slightly
under stable conditions.

Not sure if I'm going to move it one day.

grumpy
N184JM

do not archive

On Sep 24, 2009, at 11:05 AM, Nick Leonard wrote:

Quote:


As an informal survey for the rest of us, it would be interesting to
get feedback from those that have left it where Van's originally
suggested. Are any of you having any trouble with the transducer in
that location?

How many people have moved the unit because of inaccurate readings
or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 64706#264706




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coop85(at)verizon.net
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PostPosted: Thu Sep 24, 2009 8:43 am    Post subject: Fuel Flow Transducer Move Reply with quote

I have about 430 hours with the transducer in the plans location. No real
issues although I do notice a slight FF drop when I turn the boost pump off.
So far it has been very accurate and consistent.

Marcus
40286

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rene(at)felker.com
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PostPosted: Thu Sep 24, 2009 8:53 am    Post subject: Fuel Flow Transducer Move Reply with quote

I left mine in the standard position. I see very minor fluctuations....I do
not think it is a problem.

Rene' Felker
RV-10 N423CF Flying
801-721-6080
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wcurtis(at)nerv10.com
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PostPosted: Thu Sep 24, 2009 9:11 am    Post subject: Fuel Flow Transducer Move Reply with quote

I think the general consensus is that is works fine in the standard location (tunnel) if you can accept some variability in flow indications when the electric fuel pump is on.  With that being said, mine sits BEFORE the flow divider on top of the air box in the picture below.  It is not flying yet but in my Cardinal it is AFTER the mechanical fuel pump BEFORE the servo and very stable.
 
http://wcurtis.nerv10.com/90Electrical/EL2g.html
 
William
http://wcurtis.nerv10.com/


 
On Thu, Sep 24, 2009 at 12:05 PM, Nick Leonard <nick(at)nleonard.com (nick(at)nleonard.com)> wrote:
[quote]--> RV10-List message posted by: "Nick Leonard" <nick(at)nleonard.com (nick(at)nleonard.com)>

As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested.  Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=264706#264706
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dlm46007(at)cox.net
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PostPosted: Thu Sep 24, 2009 9:13 am    Post subject: Fuel Flow Transducer Move Reply with quote

No problem with the Vans location. Engine is certified IO540D4A5.

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jesse(at)saintaviation.co
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PostPosted: Thu Sep 24, 2009 9:42 am    Post subject: Fuel Flow Transducer Move Reply with quote

The only problem I have seen with the transducer in the tunnel is that
it reads a little high when the boost pump is on.

do not archive

Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694

On Sep 24, 2009, at 12:05 PM, Nick Leonard wrote:

Quote:


As an informal survey for the rest of us, it would be interesting to
get feedback from those that have left it where Van's originally
suggested. Are any of you having any trouble with the transducer in
that location?

How many people have moved the unit because of inaccurate readings
or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 64706#264706




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dmaib(at)mac.com
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PostPosted: Thu Sep 24, 2009 9:53 am    Post subject: Fuel Flow Transducer Move Reply with quote

Van's location with no issues on an IO-540-C4B5. I get some minor
fluctuations (.2 gph) at times. I only notice this when adjusting to
LOP operations. Not nearly bothersome enough to consider moving it at
this point in time. If I had steam gauges instead of a digital
readout, I doubt that I would even notice it at all.

David Maib
40559
Flying/150 hours


On Sep 24, 2009, at 1:06 PM, David McNeill wrote:



No problem with the Vans location. Engine is certified IO540D4A5.

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orchidman



Joined: 10 Jul 2006
Posts: 277
Location: Oklahoma City - KRCE

PostPosted: Thu Sep 24, 2009 10:15 am    Post subject: Re: Fuel Flow Transducer Move Reply with quote

wcurtis(at)nerv10.com wrote:
I think the general consensus is that is works fine in the standard location (tunnel) if you can?accept some variability in flow indications when the electric fuel pump is on.? With that being said, mine sits BEFORE the flow divider on top of the air box in the picture below.? It is not flying yet but in my Cardinal it is AFTER the mechanical fuel pump BEFORE the servo and?very stable.
?
http://wcurtis.nerv10.com/90Electrical/EL2g.html
?
William

William,
If the transducer in your picture is from AFS, contact them. Mine leaked around the gasket on the cover plate. There was a recall from the mfg and they replaced mine right away. That was my only real problem during my fly off. Took me some time to identify where the leak was coming from. The transducer in my picture is the old one. The new one does not have that little filled slot on the cover.
I am sure glad I had moved the transducer from the tunnel to north of the firewall.


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Gary Blankenbiller
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(N2GB Flying)
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jump2(at)sbcglobal.net
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PostPosted: Thu Sep 24, 2009 10:50 am    Post subject: Fuel Flow Transducer Move Reply with quote

Question, Why the teflon tape or pipe sealent? Why aluminum fitting into the transducer?
JP instruments and I suggest never ever use that stuff on the transducer. And it would be a lot better if you had a straight out fitting from the transducer. Not the ninety. Good book to read Is the JPI installation manual. I think it''s the second page where it says, read this first.
But that just my opinion and we all have one.
Patrick Thyssen

But then I too made a mistake and bought OP Equiptment And now I'm fixing that.
Dual 430w and garmin G500. Now I know they will work.
--- On Thu, 9/24/09, William Curtis <wcurtis(at)nerv10.com> wrote:
Quote:

From: William Curtis <wcurtis(at)nerv10.com>
Subject: Re: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com
Date: Thursday, September 24, 2009, 11:56 AM

I think the general consensus is that is works fine in the standard location (tunnel) if you can accept some variability in flow indications when the electric fuel pump is on. With that being said, mine sits BEFORE the flow divider on top of the air box in the picture below. It is not flying yet but in my Cardinal it is AFTER the mechanical fuel pump BEFORE the servo and very stable.

http://wcurtis.nerv10.com/90Electrical/EL2g.html

William
http://wcurtis.nerv10.com/



On Thu, Sep 24, 2009 at 12:05 PM, Nick Leonard <[url=/mc/compose?to=nick(at)nleonard.com]nick(at)nleonard.com[/url]> wrote:
Quote:
--> RV10-List message posted by: "Nick Leonard" <[url=/mc/compose?to=nick(at)nleonard.com]nick(at)nleonard.com[/url]>

As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested. Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=264706#264706
t Un/Subscription,
www.matronics.com/Navigator?RV10-List" target="_blank">http://www.matronics.com/Navigator?RV10-List
ronics.com/" target="_blank">http://forums.matronics.com
Matt Dralle, List Admin.
=====


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[quote][b]


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wcurtis(at)nerv10.com
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PostPosted: Thu Sep 24, 2009 12:17 pm    Post subject: Fuel Flow Transducer Move Reply with quote

Guess you did not read the caption above the photo regarding the aluminum fitting.  NPT fittings benefit from sealant, AN fittings do not.  The inlet to the flow transducer is NPT.  As far as the 90 degree fitting out from the transducer, well that's what I have now on the Cardinal and it works just fine.  The instrument I have in the Cardinal is Electronics International, the OEM for the "red cube" transducer so no, I never read nor plan to read the JPI manual.
 
William
http://wcurtis.nerv10.com/
On Thu, Sep 24, 2009 at 2:47 PM, Patrick Thyssen <jump2(at)sbcglobal.net (jump2(at)sbcglobal.net)> wrote:
[quote] Question, Why the teflon tape or pipe sealent? Why aluminum fitting into the transducer?
JP instruments and I suggest never ever use that stuff on the transducer. And it would be a lot better if you had a straight out fitting from the transducer. Not the ninety. Good book to read Is the JPI installation manual. I think it''s the second page where it says, read this first.
But that just my opinion and we all have one.
 Patrick Thyssen

But then I too made a mistake and bought OP Equiptment And now I'm fixing that.
Dual 430w and garmin G500. Now I know they will work.  


--- On Thu, 9/24/09, William Curtis <wcurtis(at)nerv10.com (wcurtis(at)nerv10.com)> wrote:
Quote:

From: William Curtis <wcurtis(at)nerv10.com (wcurtis(at)nerv10.com)>
Subject: Re: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Thursday, September 24, 2009, 11:56 AM

I think the general consensus is that is works fine in the standard location (tunnel) if you can accept some variability in flow indications when the electric fuel pump is on.  With that being said, mine sits BEFORE the flow divider on top of the air box in the picture below.  It is not flying yet but in my Cardinal it is AFTER the mechanical fuel pump BEFORE the servo and very stable.
 
http://wcurtis.nerv10.com/90Electrical/EL2g.html
 

William
http://wcurtis.nerv10.com/


 
On Thu, Sep 24, 2009 at 12:05 PM, Nick Leonard <nick(at)nleonard.com> wrote:
Quote:
--> RV10-List message posted by: "Nick Leonard" <nick(at)nleonard.com>

As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested.  Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264706#264706
t Un/Subscription,
www.matronics.com/Navigator?RV10-List" target="_blank">http://www.matronics.com/Navigator?RV10-List
ronics.com/" target="_blank">http://forums.matronics.com
Matt Dralle, List Admin.
=====


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rbibb



Joined: 16 Jul 2009
Posts: 37

PostPosted: Thu Sep 24, 2009 12:55 pm    Post subject: Fuel Flow Transducer Move Reply with quote

Well if I get real bored this winter I might read it. But the Redskins will have to keep playing the way they’ve been playing, the Hokies will have to tank, and The History Channel will have gone off the air….

Richard Bibb
972-771-2598
972-835-5979 mobile




, I never read nor plan to read the JPI manual.”



William

http://wcurtis.nerv10.com/

On Thu, Sep 24, 2009 at 2:47 PM, Patrick Thyssen <jump2(at)sbcglobal.net (jump2(at)sbcglobal.net)> wrote: “Good book to read is the JPI Manual”

DO NOT ARCHIVE

[quote][b]


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Deems Davis



Joined: 09 Jan 2006
Posts: 925

PostPosted: Thu Sep 24, 2009 1:46 pm    Post subject: Fuel Flow Transducer Move Reply with quote

As others have noted with the transducer installed in the tunnel prior
to the mech fuel pump and after the elect boost pump, you WILL see
errroneous readings during the period the elect fuel pump is operated.
From my experience you will ALSO see significant fluctuations in the
fuel flows. (+/- .5 gph) during the normal course of operations this
sin't too much of an issue. However if you are trying to balance your
fuel injectors or troubleshooting a fuel system issue and want to
collect accurate datam to a .1 of a gph, you will get VERY frustrated.
Save yourself some frustration and mount it between the servo and the
distribution spider.

Deems Davis
www.deemsrv10.com
N519PJ

Nick Leonard wrote:
Quote:


As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested. Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 64706#264706




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Ron.McGann(at)thalesgroup
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PostPosted: Thu Sep 24, 2009 2:32 pm    Post subject: Fuel Flow Transducer Move Reply with quote

Only 40 hours but same experience as Marcus. Only irregluarity comes
when the boost pump is engaged but the totaliser function always appears
to reflect remaining fuel to within a gallon or so.

Ron McGann

Head of Engineering
Security Solutions & Services
Aerospace

Tel: +61 2 9562 3530 | Mob: +61 (0) 466 655 393 | Fax: +61 2 9562 2100

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jump2(at)sbcglobal.net
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PostPosted: Thu Sep 24, 2009 6:41 pm    Post subject: Fuel Flow Transducer Move Reply with quote

I'LL STAND BY MY STATEMENT WITH THE ADDED INSERT, EI MAKE INSTALLATION MANUALS ALSO. THEY REFERENCE AC43-13 ALSO. YOUR LOSS FOR NOT READING EVERYTHING YOU CAN. YOU WOULD LEARN A LOT MORE.
PATRICK THYSSEN
--- On Thu, 9/24/09, William Curtis <wcurtis(at)nerv10.com> wrote:
Quote:

From: William Curtis <wcurtis(at)nerv10.com>
Subject: Re: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com
Date: Thursday, September 24, 2009, 3:10 PM

Guess you did not read the caption above the photo regarding the aluminum fitting. NPT fittings benefit from sealant, AN fittings do not. The inlet to the flow transducer is NPT. As far as the 90 degree fitting out from the transducer, well that's what I have now on the Cardinal and it works just fine. The instrument I have in the Cardinal is Electronics International, the OEM for the "red cube" transducer so no, I never read nor plan to read the JPI manual.
 
William
http://wcurtis.nerv10.com/
On Thu, Sep 24, 2009 at 2:47 PM, Patrick Thyssen <jump2(at)sbcglobal.net> wrote:
Quote:
Question, Why the teflon tape or pipe sealent? Why aluminum fitting into the transducer?
JP instruments and I suggest never ever use that stuff on the transducer. And it would be a lot better if you had a straight out fitting from the transducer. Not the ninety. Good book to read Is the JPI installation manual. I think it''s the second page where it says, read this first.
But that just my opinion and we all have one.
Patrick Thyssen

But then I too made a mistake and bought OP Equiptment And now I'm fixing that.
Dual 430w and garmin G500. Now I know they will work.


--- On Thu, 9/24/09, William Curtis <wcurtis(at)nerv10.com> wrote:
Quote:

From: William Curtis <wcurtis(at)nerv10.com>
Subject: Re: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com
Date: Thursday, September 24, 2009, 11:56 AM

I think the general consensus is that is works fine in the standard location (tunnel) if you can accept some variability in flow indications when the electric fuel pump is on. With that being said, mine sits BEFORE the flow divider on top of the air box in the picture below. It is not flying yet but in my Cardinal it is AFTER the mechanical fuel pump BEFORE the servo and very stable.

http://wcurtis.nerv10.com/90Electrical/EL2g.html


William
http://wcurtis.nerv10.com/



On Thu, Sep 24, 2009 at 12:05 PM, Nick Leonard <nick(at)nleonard.com> wrote:
Quote:
--> RV10-List message posted by: "Nick Leonard" <nick(at)nleonard.com>

As an informal survey for the rest of us, it would be interesting to get feedback from those that have left it where Van's originally suggested. Are any of you having any trouble with the transducer in that location?

How many people have moved the unit because of inaccurate readings or other problems?

--------
Nick Leonard
RV-10 (40015) Finish


Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264706#264706
t Un/Subscription,
www.matronics.com/Navigator?RV10-List" target="_blank">http://www.matronics.com/Navigator?RV10-List
ronics.com/" target="_blank">http://forums.matronics.com
Matt Dralle, List Admin.
=====


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Dick Sipp



Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

PostPosted: Thu Sep 24, 2009 6:51 pm    Post subject: Fuel Flow Transducer Move Reply with quote

Good discussion on fuel flow transducer mounting. Mine is between the
engine boost pump and servo, working good (at) 180 hours with very stable
readings.

IMHO they are better left free floating in the line where ever mounted in
the engine compartment rather than hard mounted to the engine. I think hard
mounting would transmit engine vibration directly into the sensor and might
shorten it's life. Hard mounting also adds some additional heat input. The
Flowscan instructions suggest floating in the line and wrapping with fire
sleeve.

Dick Sipp
RV10 N110DV 180 hours


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PostPosted: Thu Sep 24, 2009 7:21 pm    Post subject: Fuel Flow Transducer Move Reply with quote

One thing I have just thought about and correct me if I'm wrong. From the fuel pump to the fuel pressure sending unit is up hill or above the fuel pump. This being said if you get air in your hoses going to your pressure transducer from being hot [vapor] then you could have a problem as to what it is reporting.
By having a compression of air instead of solid liquid.
Lets hear from the engineers.

Patrick Thyssen
Engine pickled again!!! for new instrument panel
Oh how I love OP

--- On Thu, 9/24/09, McGann, Ron <Ron.McGann(at)thalesgroup.com.au> wrote:
[quote]
From: McGann, Ron <Ron.McGann(at)thalesgroup.com.au>
Subject: RE: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com
Date: Thursday, September 24, 2009, 5:28 PM

--> RV10-List message posted by: "McGann, Ron" <Ron.McGann(at)thalesgroup.com.au>

Only 40 hours but same experience as Marcus. Only irregluarity comes
when the boost pump is engaged but the totaliser function always appears
to reflect remaining fuel to within a gallon or so.

Ron McGann

Head of Engineering
Security Solutions & Services
Aerospace

Tel: +61 2 9562 3530 | Mob: +61 (0) 466 655 393 | Fax: +61 2 9562 2100

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Tim Olson



Joined: 25 Jan 2007
Posts: 2872

PostPosted: Thu Sep 24, 2009 8:41 pm    Post subject: Fuel Flow Transducer Move Reply with quote

Pressure is pressure, it's just the compressibility that is
different. If the vapor were at 50psi, it would push
down on the fuel at 50psi, and up on the fuel pressure
sender at 50psi, and the fuel would transfer that pressure
to the engine at 50psi. Doesn't matter if it's vapor, or
what is in the line...it's just a diaphragm that is
displaying pressure. Think of a manometer..it's using
air and liquid to show air pressure, but inside the
manometer is both air and liquid. It's all the same when
it's pushing out against something else. If you have a
pot of steaming water and you plug it, the steam will
build up pressure, and if you puncture the bottom of
the pot, the water will come out at whatever pressure
the steam is at.

So no, it shouldn't have an effect on the pressure reading.

Tim Olson - RV-10 N104CD

Patrick Thyssen wrote:
[quote] One thing I have just thought about and correct me if I'm wrong. From
the fuel pump to the fuel pressure sending unit is up hill or above the
fuel pump. This being said if you get air in your hoses going to your
pressure transducer from being hot [vapor] then you could have a
problem as to what it is reporting.
By having a compression of air instead of solid liquid.
Lets hear from the engineers.

Patrick Thyssen
Engine pickled again!!! for new instrument panel
Oh how I love OP

--- On *Thu, 9/24/09, McGann, Ron /<Ron.McGann(at)thalesgroup.com.au>/* wrote:


From: McGann, Ron <Ron.McGann(at)thalesgroup.com.au>
Subject: RE: Re: Fuel Flow Transducer Move
To: rv10-list(at)matronics.com
Date: Thursday, September 24, 2009, 5:28 PM


<Ron.McGann(at)thalesgroup.com.au>

Only 40 hours but same experience as Marcus. Only irregluarity comes
when the boost pump is engaged but the totaliser function always appears
to reflect remaining fuel to within a gallon or so.

Ron McGann

Head of Engineering
Security Solutions & Services
Aerospace

Tel: +61 2 9562 3530 | Mob: +61 (0) 466 655 393 | Fax: +61 2 9562 2100

--


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