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1. 08:05 AM - Re: RV-List: Where Do I Install The Fuel Flow Transducer (Matt Dralle)
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| 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:
>--> RV-List message posted by: Brian Cross <bcross2160@rogers.com>
>
>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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