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flying-nut(at)cfl.rr.com
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 Posted: Fri Mar 28, 2014 6:33 pm Post subject: Need help with FloScan re-location from tunnel to engine co |
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Doesn't answer your exact question but I mounted my floscan to the lower
engine mount crossbar. I used Adel clamps to attach a 2X2" aluminum
angle that the floscan mounts on so it's between the mechanical pump and
the fuel servo. The reason I did it that way is I've installed an iSTART
system that injects fuel into the air intake past the fuel servo. See
it in use here: http://istartair.com/. If I placed the floscan between
the servo and spider the fuel usage wouldn't be as accurate as I want.
You reminded me to take pictures which I'll do after Sun -n-Fun.
Linn
On 3/28/2014 9:42 PM, Bill Watson wrote:
| Quote: |
Can anyone point me to any installation pictures of FloScan
installations where the unit is mounted between the fuel controller
and the spider? Any links or pics appreciated.
Background:
I've decided to change the location of my fuel flow unit from the
tunnel to between the fuel controller and the spider. I've seen a few
pictures of other installations but I know I've seen some I can't find
at the moment.
I've gotten quite comfortable with the tunnel installation. There's no
doubt that it's a bit inaccurate with the boost pump on but that's not
really a problem.
However, the folks at Airflow pointed out 2 other issues that I'm in
fact experiencing:
1) Fuel flow readings fluctuate a bit, as recorded by my GRT system.
It's only plus/minus .2GPH but it limits the accuracy of my nozzle
tuning efforts. I'm tuned up pretty good right now but I'd like to
improve it a bit more.
2) During full power climbs my fuel pressure drops a bit below where
it should and that causes me to turn on my boost pump for short
periods of time midway up during my climb outs. I can't recite the
exact reasons for that as described by Don Rivera at Airflow, but
it's related to the restriction of flow sensor and it's location
between the tank and the engine driven fuel pump. As I understand it,
it's best to have as few restrictions as possible upstream of the fuel
pump. And having inadequate fuel pressure during full power
operations is undesirable.
Bill
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schmoboy
Joined: 26 Feb 2006
Posts: 130
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| Posted: Fri Mar 28, 2014 6:44 pm Post subject: Need help with FloScan re-location from tunnel to engine co |
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Bill, here's a slew of various installs of the red cube fwf...
http://www.matronics.com/forums/viewtopic.php?t=93819
-Sean #40303 (Just weighed the bird)
| Quote: | Bill Watson <mailto:Mauledriver(at)nc.rr.com>
March 28, 2014 at 8:42 PM
Can anyone point me to any installation pictures of FloScan
installations where the unit is mounted between the fuel controller
and the spider? Any links or pics appreciated.
Background:
I've decided to change the location of my fuel flow unit from the
tunnel to between the fuel controller and the spider. I've seen a few
pictures of other installations but I know I've seen some I can't find
at the moment.
I've gotten quite comfortable with the tunnel installation. There's
no doubt that it's a bit inaccurate with the boost pump on but that's
not really a problem.
However, the folks at Airflow pointed out 2 other issues that I'm in
fact experiencing:
1) Fuel flow readings fluctuate a bit, as recorded by my GRT system.
It's only plus/minus .2GPH but it limits the accuracy of my nozzle
tuning efforts. I'm tuned up pretty good right now but I'd like to
improve it a bit more.
2) During full power climbs my fuel pressure drops a bit below where
it should and that causes me to turn on my boost pump for short
periods of time midway up during my climb outs. I can't recite the
exact reasons for that as described by Don Rivera at Airflow, but
it's related to the restriction of flow sensor and it's location
between the tank and the engine driven fuel pump. As I understand it,
it's best to have as few restrictions as possible upstream of the fuel
pump. And having inadequate fuel pressure during full power
operations is undesirable.
Bill
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Mauledriver(at)nc.rr.com
Guest
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| Posted: Sun Mar 30, 2014 8:34 am Post subject: Need help with FloScan re-location from tunnel to engine co |
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Thanks!
It looks like the transducer is 'unmounted' in this case and just
supported by the fuel hoses. I'm thinking of doing the same. Anyone
with experience using a fuel hose supported Flowscan?
(do not archive)
On 3/29/2014 2:04 PM, Ben Westfall wrote:
[quote]
Bill,
Mark Cooper's blog has some pics and a description of his mounting in the
similar location.
http://myrv10factory.wordpress.com/2012/12/10/red-cube-relocation-garmin-gtn
-750-tx-fixed-par100ex-music-limitations-and-afs-screen-tweaks/
-Ben
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speckter(at)comcast.net
Guest
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| Posted: Sun Mar 30, 2014 9:22 am Post subject: Need help with FloScan re-location from tunnel to engine co |
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I have run mine unsupported for 400 hours
Gary
[quote] On Mar 30, 2014, at 12:34 PM, Bill Watson <Mauledriver(at)nc.rr.com> wrote:
Thanks!
It looks like the transducer is 'unmounted' in this case and just supported by the fuel hoses. I'm thinking of doing the same. Anyone with experience using a fuel hose supported Flowscan?
(do not archive)
> On 3/29/2014 2:04 PM, Ben Westfall wrote:
>
>
> Bill,
>
> Mark Cooper's blog has some pics and a description of his mounting in the
> similar location.
>
> http://myrv10factory.wordpress.com/2012/12/10/red-cube-relocation-garmin-gtn
> -750-tx-fixed-par100ex-music-limitations-and-afs-screen-tweaks/
>
> -Ben
>
>
> --
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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| Posted: Sun Mar 30, 2014 9:57 am Post subject: Need help with FloScan re-location from tunnel to engine co |
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Yes,
I went through the same thing after talking to Don (at) Airflow, I have the Floscan and "mounted " it (at) the front corner of the engine case http://deemsrv10.com/album/Sec%20FF4%20Fuel%20System/slides/DSC04976.html. I used a mounting bracket fabbed out of alu similar to: http://deemsrv10.com/album/Sec%20FF4%20Fuel%20System/slides/DSC04980.html. I ordered 2 new hoses to replace this: http://deemsrv10.com/album/Sec%20FF4%20Fuel%20System/slides/DSC04978.html. The hose the connects the servo and the flow scan has a right angle fitting where it connects to the floscan. There is a caution some where about avoiding that, but the configuration works flawlessly with no fluctuations.
On Sun, Mar 30, 2014 at 9:34 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:
[quote]--> RV10-List message posted by: Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)>
Thanks!
It looks like the transducer is 'unmounted' in this case and just supported by the fuel hoses. I'm thinking of doing the same. Anyone with experience using a fuel hose supported Flowscan?
(do not archive)
On 3/29/2014 2:04 PM, Ben Westfall wrote:
[quote] --> RV10-List message posted by: "Ben Westfall" <rv10(at)sinkrate.com (rv10(at)sinkrate.com)>
Bill,
Mark Cooper's blog has some pics and a description of his mounting in the
similar location.
http://myrv10factory.wordpress.com/2012/12/10/red-cube-relocation-garmin-gtn
-750-tx-fixed-par100ex-music-limitations-and-afs-screen-tweaks/
-Ben
--
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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| Posted: Tue Apr 01, 2014 6:57 am Post subject: Need help with FloScan re-location from tunnel to engine co |
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integral vs integrated
On Tue, Apr 1, 2014 at 6:01 AM, Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)> wrote:
[quote]--> RV10-List message posted by: Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)>
<<I will go with integral firesleeve hose there, which cannot be field fabricated.>>
I fabricated all my fuel and oil lines on both my RV-4 and RV-10 with integrated fire sleeve. Why do you say they cannot be done in the field? They are actually rather easy to fabricate...
-Mike Kraus
Sent from my iPhone
> On Apr 1, 2014, at 8:31 AM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:
>
> I will go with integral firesleeve hose there, which cannot be field fabricated.
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Tue Apr 01, 2014 12:13 pm Post subject: Re: Need help with FloScan re-location from tunnel to engin |
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"It looks like the transducer is 'unmounted' in this case and just
supported by the fuel hoses. I'm thinking of doing the same. Anyone
with experience using a fuel hose supported Flowscan?"
Many years ago we installed a fuel flow device on our 182. I think it was a FF450?? Back then the instructions were explicit to not hard mount it, but to suspend it between two flexible hoses. I think the installation kit back then came with fire-sleeve large enough in diameter to go over the transducer as well as the two hoses (secured by hose clamps). Last I heard it was still working just fine, going on at least a dozen years.
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Bob Turner
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