BCROSS
Joined: 10 May 2009
Posts: 5
Location: Brampton, Ontario
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 Posted: Wed Jul 22, 2009 7:00 pm Post subject: RV8-List Digest: 1 Msgs - 06/20/09 |
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Hi Matt
Sorry for the delay in my reply but I really do appreciate your
thoughts re: fuel transducer placement. The pictures you took are
phenomenal just as your appears to be as well. Thank so much for
taking the time to do this. Anything to do with the fuel system
ranks #1 in importance & I am also building with the same engine you
have chosen. At the rate you are going, you will be looking down on
the rest in the non too distant future.
Thanks again & all the best
Sincerely
Brian Cross
RV-8 #81844
At 02:58 6/21/2009, you wrote:
| Quote: | *
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RV8-List Digest Archive
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Total Messages Posted Sat 06/20/09: 1
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Today's Message Index:
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1. 08:05 AM - Re: RV-List: Where Do I Install The Fuel Flow
Transducer (Matt Dralle)
________________________________ Message
1 _____________________________________
Time: 08:05:08 AM PST US
From: Matt Dralle <dralle(at)matronics.com>
Subject: Re: RV-List: Where Do I Install The Fuel Flow Transducer
Hi Brian,
I haven't actually run with this configuration, but attached are
some photos of
my installation. I have two 201b transducers, one for the GRT
EIS4000 and another
for the Matronics FuelChec DX. I might have been able to share the signal,
but I preferred to just have completely separate units. I put them on the
output of the electric fuel pump after a generous length of
tubing. I'm running
the high-pressure fuel pump for the IO-390 engine. The transducer reading
stability is a lot less of an issue on the injected installations.
I also built an enclosure around the fuel pump area so that I could
carpet over
that area.
Matt Dralle
RV-8 #82880 N998RV
Mounting Ailerons & Flaps...
At 07:35 AM 6/20/2009 Saturday, you wrote:
>
>
>Hi Folks
>
>I am working on the installation of the of the fuel flow
transducer on my angle
valve Lycoming. I have the standard EI FT-60 red cube which I
purchased through
>Advanced Flight Systems. I am struggling as to where is the best
location to
mount this unit.
>
>Their manual suggests 3 locations, (page 59);
>
>1/ The transducer may be mounted in a stationary position in line
between the
electric boost pump and the engine driven pump.
>
>2/ The transducer may be mounted in a stationary position in line
between the
fuel injection servo and the distribution block, aka, spider.
>
>3/ The transducer may be mounted in a stationary position in line
between the
engine driven pump and the carburetor, I assume this could also mean the fuel
injection servo.
>
>My thoughts:
>
>Option 1/ On the RV-8, there is a lot of unused room in the left
footwell area
& could easily be mounted on the output of the electric pump aft of
the firewall.
Lots of room, cool area, good environment for the transducer. Can easily
put the 5" of straight line before & after the unit as per their instructions.
Electrical wiring would not have to go through the firewall. Down side in
my mind is that there is an orifice of about 5/32" in order to direct the fuel
flow at the paddle wheel. During normal operations, the mechanical fuel pump
would have to suck through that rather small orifice in a 3/8" fuel
line. Problem?
I am not sure.
>
>Option 2/ I have seen that mounted basically between cylinders #
1 & # 3. Possibly
hand it directly from the spider itself & would make a reasonably neat
installation. Downside: Pretty hot area especially right after
shutdown - not
an ideal environment for the transducer. Quite a bit of vibration there of
course & 2 joints would be added i.e the hose would have to be split here. 5"
of straight line before & after would be difficult & would actually
put the unit
almost dead centre between the cylinders. Option 2 & 3 would put the unit
on the pressure side of the mechanical or the electrical pump at all
times easing
my small orifice concern.
>
>Option 3/ Still in a hot area but not as bad as Option 2 assuming
heat shields
around the exhaust pipe is used. 5" straight rule would be replaced by 5" of
gently curving lines. Not as nice an environment obviously as Option 1.
>
>Sure would like some opinions on this one. Sorry about the detail.
>
>Thanks very much.
>
>Brian Cross
>RV-8
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