Today's Message Index:
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1. 03:21 PM - Re: Fuel Filter (Tim Juhl)
2. 03:34 PM - Re: Re: Fuel Filter (Craig Payne)
3. 04:37 PM - Re: Re: Fuel Filter (Lynn Matteson)
Message 1
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I've never seen a fuel filter on any of the production aircraft I've owned or flown,
just a gascolator backed up by drain points in the tanks. I haven't decided
whether to install a filter or not. I wonder if it isn't just one more
point of potential failure.
Flame away!
Tim
--------
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Working on fuselage
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=217404#217404
Message 2
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Well the Jabiru 3300 (hydraulic lifter) installation manual specifically
calls for one:
"11.2 Fuel Filtration
A Fuel filter capable of preventing the passage of particles larger than
0.1mm (100um) must
be installed between the fuel tank outlet and the fuel pump.
The filter must be present in the system for the fuel flow test. The size of
the filter should
give consideration to allow adequate flow with a used filter.
A Ryco Z15 or similar filter has been used successfully."
Rev 1, March 27, 2006, page 21 of 49.
I suppose if the mesh in the gascolator met those numbers they would be
happy.
-- Craig
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Tim Juhl
Sent: Tuesday, December 02, 2008 4:21 PM
Subject: JabiruEngine-List: Re: Fuel Filter
I've never seen a fuel filter on any of the production aircraft I've owned
or flown, just a gascolator backed up by drain points in the tanks. I
haven't decided whether to install a filter or not. I wonder if it isn't
just one more point of potential failure.
Flame away!
Tim
--------
______________
CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Working on fuselage
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=217404#217404
Message 3
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No flames, but no failures either, in any of my three Purolator in-
line glass fuel filters in nearly 600 hours of operation....and no
gascolator, either. Just a header tank with the wing tanks feeding
it, and a sumping point at the bottom. This serves the same purpose
as a gascolator. It allows any crap that reaches the header tank to
settle to the bottom, where it is "sumped" away the next time fuel is
drained...the next day, hopefully. And unlike a gascolator, the
capacity of this tank below the fuel outlet port is almost a quart,
so you could get really lazy/inattentive and still not get any crap
in the outgoing fuel...unless you shook the airplane really
violently, then tried to fly it. Then you might get some floating
crap into the outlet port. Guess what? Downstream from this header
tank is the last of the three filters.
And just for the record, I've got 19 hose clamps and more than that
in potential points of leakage, if you count the barbed fittings that
are screwed into the tanks, valves, filters, firewall pass-through,
and carb. Oh, and by the way, this is a high-wing, gravity-flow system.
I just found the figures for fuel flow that I posted back on Nov 5,
and which I'll paste here:
*****
Just for the record, before I removed the fuel pump and fuel pressure
gauge sending unit from my system, I measured the fuel flow right at
the carb, and it was 11.25 gallons per hour. With the fuel pump and
fuel pressure gauge sending unit removed, and 1/4" fuel line in it's
place, the flow was 13.6 gallons per hour. This was measured (with
about 5 gallons in each of the two wing tanks) by taking the float
bowl off and timing the flow of fuel through the carb (with the new
3.7mm float needle seat) for one minute, multiplied by 60. I can now
climb as steeply as desired, and the engine doesn't go lean or
stumble from lack of fuel.
*****
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, 593hrs
Sensenich 62x46
flying again after rebuild, and new Electroair direct-fire ignition
system;
also building a new pair of snow skis
On Dec 2, 2008, at 6:21 PM, Tim Juhl wrote:
>
> I've never seen a fuel filter on any of the production aircraft
> I've owned or flown, just a gascolator backed up by drain points
> in the tanks. I haven't decided whether to install a filter or
> not. I wonder if it isn't just one more point of potential failure.
>
> Flame away!
>
> Tim
>
> --------
> ______________
> CFII
> Champ L16A flying
> Zodiac XL - Jabiru 3300A
> Working on fuselage
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=217404#217404
>
>
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