Author: "SteinAir, Inc." <flyboyyy@...> Time: Sun Dec 5, 2004 7:36 pm PST Link
Hi Danny,
Let me start by saying this isn't a flame at all, just some
constructive criticism (which I'm famous for) backed up by a little
experience.
Using the gascolator as the "low point" in the fuel system is kind
of a misnomer. Actually, the low point in the fuel system is/should
be the fuel sumps in the tanks. The fuel pickups are above the
bottom of the tank. Now, you're talking about water induced into
the system after the tanks, which could/might happen. That being
said, there are several areas on these planes where
adding "perceived" redundancy actually introduces more potential
failures; it's known as the point of diminishing returns and is not
the panacea it seems. In these cases, you actually increase your
risk of failure instead of decreasing it. Two systems which the
addition of the "pants/suspenders" perceived redundancy that don't
necessarily add factual redundancy are Fuel & Electrical.
Here's the deal. You've taken a basically good system already and
added a bunch of complexity. Whether or not your gascolator is
upstream or downstream (I forgot to ask) of the AFP package doesn't
really matter, but read the following and see how it looks once you
see it on paper.
You're taking fuel from the wings, then routing it into the
cockpit. Then, you're running it through a fuel selector, either to
the AFP pump or to you gascolator. Here's where the added
complexity comes in.
Now you run your fuel back outside the fuselage to the gascolator
(at high pressure from your AFP pump), next you route the fuel
through a gascolator, then you route the fuel back into the cockpit
forward to the firewall somewhere, where it once again exits the
cockpit (firewall) for final metering.
Now you see where all of these extra fittings, the additional sump,
& fuel lines could add up to potential points of failure/leaks/etc..
I'm not trying to be negative here at all, just practical. Another
thing to keep in mind, gasoclators in high pressure injected systems
don't always play well together (although many have used them) many
more have not for a whole host of reasons.
Just a bit of my "2 cents". I'd take a close look at what that
gascolator is actually buying you in your particular installation.
The "belt/suspenders" analogy is a good one, but not when dealing
with fuel & electrical systems. If your belt OR suspenders fail,
your pants still stay on, but - if your fuel line breaks, leaks,
etc.., the additional fuel lines & gascolator won't help....
A friendly "cheers",
Stein.
--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
wrote:
> Yes I'm using Van's AFP kit that includes the filter.
> I'm using the gascolator for water removal and drainage. I'm
putting
> the gascolator between the fuselage and left wing down near the
> bottom of the wing where I can drain it thru a hole in the wing
gap
> seal. It will be at a very low point so water should be trapped
> there. Yes I know it like wearing a belt and suspenders but the
AFP
> filter is not there to collect water and if it did you can't
really
> check or drain it other than during an inspection or other
> maintenance. Certainly not before each flight.
>
> Danny
> > --- In vansairforce@yahoogroups.com, "dannylsmith"
<dsmit132@b...>
> > wrote:
> > > Plumbing the fuel lines to the Airflow performance pump and to
an
> > > Andair gascolator between the fuselage and left wing is a real
> > bear!
> > > Danny
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Author: "Paul Schattauer" <chasm711@...> Time: Mon Dec 6, 2004 3:37 am PST Link
Stein
I'm not sure I'm following you. Are you saying some people design fuel
systems that pass through the firewall more than once? If so that's nuts.
A gascolator gives you one more filter and drain and two more connectors, it
is not necessary but some people like them. They live outside of the
fuselage, usually in the wing root or forward of the firewall. They don't
present much of a trap for water in a low wing tail dragger but they do give
you another filter.
My gascolator lives low, forward of the firewall and is drained with the
cowl on. Fuel travels from the wings to the selector valve to the high
pressure filter to the electric pump through the firewall to the gascolator
to the engine driven pump to the fuel injection servo. Works. At my first
hundred hour inspection I found a little gooey fiber contamination in the
gascolator. I liked it better there then in my injectors
Paul Schattauer
RV8 808PS
>From: "SteinAir, Inc." <flyboyyy@yahoo.com>
>Reply-To: vansairforce@yahoogroups.com
>To: vansairforce@yahoogroups.com
>Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel selector
>Date: Mon, 06 Dec 2004 03:00:26 -0000
>Hi Danny,
>
>Let me start by saying this isn't a flame at all, just some
>constructive criticism (which I'm famous for) backed up by a little
>experience.
>
>Using the gascolator as the "low point" in the fuel system is kind
>of a misnomer. Actually, the low point in the fuel system is/should
>be the fuel sumps in the tanks. The fuel pickups are above the
>bottom of the tank. Now, you're talking about water induced into
>the system after the tanks, which could/might happen. That being
>said, there are several areas on these planes where
>adding "perceived" redundancy actually introduces more potential
>failures; it's known as the point of diminishing returns and is not
>the panacea it seems. In these cases, you actually increase your
>risk of failure instead of decreasing it. Two systems which the
>addition of the "pants/suspenders" perceived redundancy that don't
>necessarily add factual redundancy are Fuel & Electrical.
>
>Here's the deal. You've taken a basically good system already and
>added a bunch of complexity. Whether or not your gascolator is
>upstream or downstream (I forgot to ask) of the AFP package doesn't
>really matter, but read the following and see how it looks once you
>see it on paper.
>
>You're taking fuel from the wings, then routing it into the
>cockpit. Then, you're running it through a fuel selector, either to
>the AFP pump or to you gascolator. Here's where the added
>complexity comes in.
>
>Now you run your fuel back outside the fuselage to the gascolator
>(at high pressure from your AFP pump), next you route the fuel
>through a gascolator, then you route the fuel back into the cockpit
>forward to the firewall somewhere, where it once again exits the
>cockpit (firewall) for final metering.
>
>Now you see where all of these extra fittings, the additional sump,
>& fuel lines could add up to potential points of failure/leaks/etc..
>
>I'm not trying to be negative here at all, just practical. Another
>thing to keep in mind, gasoclators in high pressure injected systems
>don't always play well together (although many have used them) many
>more have not for a whole host of reasons.
>
>Just a bit of my "2 cents". I'd take a close look at what that
>gascolator is actually buying you in your particular installation.
>The "belt/suspenders" analogy is a good one, but not when dealing
>with fuel & electrical systems. If your belt OR suspenders fail,
>your pants still stay on, but - if your fuel line breaks, leaks,
>etc.., the additional fuel lines & gascolator won't help....
>
>A friendly "cheers",
>Stein.
>--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
>wrote:
> > Yes I'm using Van's AFP kit that includes the filter.
>
> > I'm using the gascolator for water removal and drainage. I'm
>putting
> > the gascolator between the fuselage and left wing down near the
> > bottom of the wing where I can drain it thru a hole in the wing
>gap
> > seal. It will be at a very low point so water should be trapped
> > there. Yes I know it like wearing a belt and suspenders but the
>AFP
> > filter is not there to collect water and if it did you can't
>really
> > check or drain it other than during an inspection or other
> > maintenance. Certainly not before each flight.
> >
> > Danny
> > > --- In vansairforce@yahoogroups.com, "dannylsmith"
><dsmit132@b...>
> > > wrote:
> > > > Plumbing the fuel lines to the Airflow performance pump and to
>an
> > > > Andair gascolator between the fuselage and left wing is a real
> > > bear!
> > > > Danny
>Online help on this group at:
>http://help.yahoo.com/help/groups/
>
>Yahoo! Groups Links
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Author: Mickey Coggins <mc@...> Time: Mon Dec 6, 2004 5:15 am PST Link
>... At my first
>hundred hour inspection I found a little gooey fiber contamination in the
>gascolator. I liked it better there then in my injectors
Ouch - any idea why the first fuel filter didn't catch it?
--
Mickey Coggins
http://www.rv8.ch/
#82007 QB Wings/Fuselage
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Author: "SteinAir, Inc." <flyboyyy@...> Time: Mon Dec 6, 2004 7:58 am PST Link
I guess I should have qualified this a bit better. I'm not saying
don't use a gascolator (although I'm personally not convinced they
offer much additional help), moreover I'm questioning the wing root
location and the associated plumbing of going in and out of the fuse
multiple times before even heading to the firewall with the fuel
lines.
In an injected installation, I look at it like this. First line of
defense for water is of course the sump in the tanks. First line of
defense for particles is the screens on the end of the fuel pickups
(except for the flop tubes).
2nd line is the AFP micronic filter, after this, you're only dealing
with possible contaminents in the short fuel system between the AFP
pump and engine FP (which are mostly user added contaminents).
3rd and last filter is the finger screen in the fuel injection servo.
Putting all those together takes pretty good care of your fuel
system.
Gascolators are kind of like the primer wars. There really isn't a
right or wrong, just different opinions. Mine happens to be on the
side of no gascolator, but I certainly respect the opinions of those
who choose to use one, and wouldn't think any less of those who use
them.
That being said, if they are not plumbed in correctly in the fuel
system, you really loose much of the perceived benefit to the thing
anyway.
Just my 2 cents. Wasn't trying to start a war here or hurt anyones
feelings!
Cheers,
Stein.
--- In vansairforce@yahoogroups.com, "Paul Schattauer"
<chasm711@m...> wrote:
>
> Stein
>
> I'm not sure I'm following you. Are you saying some people design
fuel
> systems that pass through the firewall more than once? If so
that's nuts.
> A gascolator gives you one more filter and drain and two more
connectors, it
> is not necessary but some people like them. They live outside of
the
> fuselage, usually in the wing root or forward of the firewall.
They don't
> present much of a trap for water in a low wing tail dragger but
they do give
> you another filter.
>
> My gascolator lives low, forward of the firewall and is drained
with the
> cowl on. Fuel travels from the wings to the selector valve to
the high
> pressure filter to the electric pump through the firewall to the
gascolator
> to the engine driven pump to the fuel injection servo. Works. At
my first
> hundred hour inspection I found a little gooey fiber contamination
in the
> gascolator. I liked it better there then in my injectors
>
> Paul Schattauer
> RV8 808PS
> >From: "SteinAir, Inc." <flyboyyy@y...>
> >Reply-To: vansairforce@yahoogroups.com
> >To: vansairforce@yahoogroups.com
> >Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel
selector
> >Date: Mon, 06 Dec 2004 03:00:26 -0000
> >Hi Danny,
> >
> >Let me start by saying this isn't a flame at all, just some
> >constructive criticism (which I'm famous for) backed up by a
little
> >experience.
> >
> >Using the gascolator as the "low point" in the fuel system is kind
> >of a misnomer. Actually, the low point in the fuel system
is/should
> >be the fuel sumps in the tanks. The fuel pickups are above the
> >bottom of the tank. Now, you're talking about water induced into
> >the system after the tanks, which could/might happen. That being
> >said, there are several areas on these planes where
> >adding "perceived" redundancy actually introduces more potential
> >failures; it's known as the point of diminishing returns and is
not
> >the panacea it seems. In these cases, you actually increase your
> >risk of failure instead of decreasing it. Two systems which the
> >addition of the "pants/suspenders" perceived redundancy that don't
> >necessarily add factual redundancy are Fuel & Electrical.
> >
> >Here's the deal. You've taken a basically good system already and
> >added a bunch of complexity. Whether or not your gascolator is
> >upstream or downstream (I forgot to ask) of the AFP package
doesn't
> >really matter, but read the following and see how it looks once
you
> >see it on paper.
> >
> >You're taking fuel from the wings, then routing it into the
> >cockpit. Then, you're running it through a fuel selector, either
to
> >the AFP pump or to you gascolator. Here's where the added
> >complexity comes in.
> >
> >Now you run your fuel back outside the fuselage to the gascolator
> >(at high pressure from your AFP pump), next you route the fuel
> >through a gascolator, then you route the fuel back into the
cockpit
> >forward to the firewall somewhere, where it once again exits the
> >cockpit (firewall) for final metering.
> >
> >Now you see where all of these extra fittings, the additional
sump,
> >& fuel lines could add up to potential points of
failure/leaks/etc..
> >
> >I'm not trying to be negative here at all, just practical. Another
> >thing to keep in mind, gasoclators in high pressure injected
systems
> >don't always play well together (although many have used them)
many
> >more have not for a whole host of reasons.
> >
> >Just a bit of my "2 cents". I'd take a close look at what that
> >gascolator is actually buying you in your particular installation.
> >The "belt/suspenders" analogy is a good one, but not when dealing
> >with fuel & electrical systems. If your belt OR suspenders fail,
> >your pants still stay on, but - if your fuel line breaks, leaks,
> >etc.., the additional fuel lines & gascolator won't help....
> >
> >A friendly "cheers",
> >Stein.
> >--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
> >wrote:
> > > Yes I'm using Van's AFP kit that includes the filter.
> >
> > > I'm using the gascolator for water removal and drainage. I'm
> >putting
> > > the gascolator between the fuselage and left wing down near the
> > > bottom of the wing where I can drain it thru a hole in the wing
> >gap
> > > seal. It will be at a very low point so water should be trapped
> > > there. Yes I know it like wearing a belt and suspenders but the
> >AFP
> > > filter is not there to collect water and if it did you can't
> >really
> > > check or drain it other than during an inspection or other
> > > maintenance. Certainly not before each flight.
> > >
> > > Danny
> > > > --- In vansairforce@yahoogroups.com, "dannylsmith"
> ><dsmit132@b...>
> > > > wrote:
> > > > > Plumbing the fuel lines to the Airflow performance pump
and to
> >an
> > > > > Andair gascolator between the fuselage and left wing is a
real
> > > > bear!
> > > > > Danny
> >Online help on this group at:
> >http://help.yahoo.com/help/groups/
> >
> >Yahoo! Groups Links
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Author: "Paul Schattauer" <chasm711@...> Time: Mon Dec 6, 2004 8:14 am PST Link
Mickey
I'm not sure but my guess it came from the electric fuel pump or the high
pressure filter. May have been their construction or my construction. It
wasn't a lot, just enough to rub between two fingers. My next hundred hour
and annual is in Feb, I expect it will be clean then.
Paul
>From: Mickey Coggins <mc@rv8.ch>
>Reply-To: vansairforce@yahoogroups.com
>To: vansairforce@yahoogroups.com
>Subject: [VAF Mailing List] Gascolator - was New Andair fuel selector
>Date: Mon, 06 Dec 2004 12:45:51 +0100
> >... At my first
> >hundred hour inspection I found a little gooey fiber contamination in the
> >gascolator. I liked it better there then in my injectors
>Ouch - any idea why the first fuel filter didn't catch it?
>--
>Mickey Coggins
>http://www.rv8.ch/
>#82007 QB Wings/Fuselage
>Online help on this group at:
>http://help.yahoo.com/help/groups/
>
>Yahoo! Groups Links
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Author: "dannylsmith" <dsmit132@...> Time: Mon Dec 6, 2004 10:59 am PST Link
Hi Paul,
Actually your gascolator is probably even more useful on a
taildragger since water could be behind your tank drains when sitting
on the ground. When you become airborne a small amount could be
picked by gascolator before reaching your engine. I agree no one
should have fuel lines going through the firewall more than once.
Take care,
Danny
--- In vansairforce@yahoogroups.com, "Paul Schattauer"
<chasm711@m...> wrote:
>
> Stein
>
> I'm not sure I'm following you. Are you saying some people design
fuel
> systems that pass through the firewall more than once? If so
that's nuts.
> A gascolator gives you one more filter and drain and two more
connectors, it
> is not necessary but some people like them. They live outside of
the
> fuselage, usually in the wing root or forward of the firewall.
They don't
> present much of a trap for water in a low wing tail dragger but
they do give
> you another filter.
>
> My gascolator lives low, forward of the firewall and is drained
with the
> cowl on. Fuel travels from the wings to the selector valve to the
high
> pressure filter to the electric pump through the firewall to the
gascolator
> to the engine driven pump to the fuel injection servo. Works. At
my first
> hundred hour inspection I found a little gooey fiber contamination
in the
> gascolator. I liked it better there then in my injectors
>
> Paul Schattauer
> RV8 808PS
> >From: "SteinAir, Inc." <flyboyyy@y...>
> >Reply-To: vansairforce@yahoogroups.com
> >To: vansairforce@yahoogroups.com
> >Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel
selector
> >Date: Mon, 06 Dec 2004 03:00:26 -0000
> >Hi Danny,
> >
> >Let me start by saying this isn't a flame at all, just some
> >constructive criticism (which I'm famous for) backed up by a little
> >experience.
> >
> >Using the gascolator as the "low point" in the fuel system is kind
> >of a misnomer. Actually, the low point in the fuel system
is/should
> >be the fuel sumps in the tanks. The fuel pickups are above the
> >bottom of the tank. Now, you're talking about water induced into
> >the system after the tanks, which could/might happen. That being
> >said, there are several areas on these planes where
> >adding "perceived" redundancy actually introduces more potential
> >failures; it's known as the point of diminishing returns and is not
> >the panacea it seems. In these cases, you actually increase your
> >risk of failure instead of decreasing it. Two systems which the
> >addition of the "pants/suspenders" perceived redundancy that don't
> >necessarily add factual redundancy are Fuel & Electrical.
> >
> >Here's the deal. You've taken a basically good system already and
> >added a bunch of complexity. Whether or not your gascolator is
> >upstream or downstream (I forgot to ask) of the AFP package doesn't
> >really matter, but read the following and see how it looks once you
> >see it on paper.
> >
> >You're taking fuel from the wings, then routing it into the
> >cockpit. Then, you're running it through a fuel selector, either
to
> >the AFP pump or to you gascolator. Here's where the added
> >complexity comes in.
> >
> >Now you run your fuel back outside the fuselage to the gascolator
> >(at high pressure from your AFP pump), next you route the fuel
> >through a gascolator, then you route the fuel back into the cockpit
> >forward to the firewall somewhere, where it once again exits the
> >cockpit (firewall) for final metering.
> >
> >Now you see where all of these extra fittings, the additional sump,
> >& fuel lines could add up to potential points of
failure/leaks/etc..
> >
> >I'm not trying to be negative here at all, just practical. Another
> >thing to keep in mind, gasoclators in high pressure injected
systems
> >don't always play well together (although many have used them) many
> >more have not for a whole host of reasons.
> >
> >Just a bit of my "2 cents". I'd take a close look at what that
> >gascolator is actually buying you in your particular installation.
> >The "belt/suspenders" analogy is a good one, but not when dealing
> >with fuel & electrical systems. If your belt OR suspenders fail,
> >your pants still stay on, but - if your fuel line breaks, leaks,
> >etc.., the additional fuel lines & gascolator won't help....
> >
> >A friendly "cheers",
> >Stein.
> >--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
> >wrote:
> > > Yes I'm using Van's AFP kit that includes the filter.
> >
> > > I'm using the gascolator for water removal and drainage. I'm
> >putting
> > > the gascolator between the fuselage and left wing down near the
> > > bottom of the wing where I can drain it thru a hole in the wing
> >gap
> > > seal. It will be at a very low point so water should be trapped
> > > there. Yes I know it like wearing a belt and suspenders but the
> >AFP
> > > filter is not there to collect water and if it did you can't
> >really
> > > check or drain it other than during an inspection or other
> > > maintenance. Certainly not before each flight.
> > >
> > > Danny
> > > > --- In vansairforce@yahoogroups.com, "dannylsmith"
> ><dsmit132@b...>
> > > > wrote:
> > > > > Plumbing the fuel lines to the Airflow performance pump and
to
> >an
> > > > > Andair gascolator between the fuselage and left wing is a
real
> > > > bear!
> > > > > Danny
> >Online help on this group at:
> >http://help.yahoo.com/help/groups/
> >
> >Yahoo! Groups Links
------------------------ Yahoo! Groups Sponsor --------------------~-->
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Author: "dannylsmith" <dsmit132@...> Time: Mon Dec 6, 2004 10:59 am PST Link
Hi Stein,
The gascolator is between the fuel selector and the AFP pump so it's
in the low pressure side of the system. This seems to be a better
place to have it vs where Van shows it midway up the firewall and on
the high pressure side of the Facet pump (Not much pressure though).
I have mixed emotions about whether to use it or not and I'm still
undecided. There is always a tradeoff on adding complexity and
potential points of failure and having a device that can potentially
add a measure of safety. Another thing that keeps running through my
mind is the question of why so many certified and experimentials are
using gascolators. Fuel filters don't help with water and could
actually make the problem worse. Ah, all these decisions?
Danny
--- In vansairforce@yahoogroups.com, "SteinAir, Inc." <flyboyyy@y...>
wrote:
> Hi Danny,
>
> Let me start by saying this isn't a flame at all, just some
> constructive criticism (which I'm famous for) backed up by a little
> experience.
>
> Using the gascolator as the "low point" in the fuel system is kind
> of a misnomer. Actually, the low point in the fuel system
is/should
> be the fuel sumps in the tanks. The fuel pickups are above the
> bottom of the tank. Now, you're talking about water induced into
> the system after the tanks, which could/might happen. That being
> said, there are several areas on these planes where
> adding "perceived" redundancy actually introduces more potential
> failures; it's known as the point of diminishing returns and is not
> the panacea it seems. In these cases, you actually increase your
> risk of failure instead of decreasing it. Two systems which the
> addition of the "pants/suspenders" perceived redundancy that don't
> necessarily add factual redundancy are Fuel & Electrical.
>
> Here's the deal. You've taken a basically good system already and
> added a bunch of complexity. Whether or not your gascolator is
> upstream or downstream (I forgot to ask) of the AFP package doesn't
> really matter, but read the following and see how it looks once you
> see it on paper.
>
> You're taking fuel from the wings, then routing it into the
> cockpit. Then, you're running it through a fuel selector, either
to
> the AFP pump or to you gascolator. Here's where the added
> complexity comes in.
>
> Now you run your fuel back outside the fuselage to the gascolator
> (at high pressure from your AFP pump), next you route the fuel
> through a gascolator, then you route the fuel back into the cockpit
> forward to the firewall somewhere, where it once again exits the
> cockpit (firewall) for final metering.
>
> Now you see where all of these extra fittings, the additional sump,
> & fuel lines could add up to potential points of failure/leaks/etc..
>
> I'm not trying to be negative here at all, just practical. Another
> thing to keep in mind, gasoclators in high pressure injected
systems
> don't always play well together (although many have used them) many
> more have not for a whole host of reasons.
>
> Just a bit of my "2 cents". I'd take a close look at what that
> gascolator is actually buying you in your particular installation.
> The "belt/suspenders" analogy is a good one, but not when dealing
> with fuel & electrical systems. If your belt OR suspenders fail,
> your pants still stay on, but - if your fuel line breaks, leaks,
> etc.., the additional fuel lines & gascolator won't help....
>
> A friendly "cheers",
> Stein.
> --- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
> wrote:
> > Yes I'm using Van's AFP kit that includes the filter.
>
> > I'm using the gascolator for water removal and drainage. I'm
> putting
> > the gascolator between the fuselage and left wing down near the
> > bottom of the wing where I can drain it thru a hole in the wing
> gap
> > seal. It will be at a very low point so water should be trapped
> > there. Yes I know it like wearing a belt and suspenders but the
> AFP
> > filter is not there to collect water and if it did you can't
> really
> > check or drain it other than during an inspection or other
> > maintenance. Certainly not before each flight.
> >
> > Danny
> > > --- In vansairforce@yahoogroups.com, "dannylsmith"
> <dsmit132@b...>
> > > wrote:
> > > > Plumbing the fuel lines to the Airflow performance pump and
to
> an
> > > > Andair gascolator between the fuselage and left wing is a
real
> > > bear!
> > > > Danny
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Author: Michèle Delsol <michele.delsol@...> Time: Wed Dec 8, 2004 3:20 am PST Link
To gascolate or not to gascolate, that is the question.
Ive been pondering the issue: Do I need one and if so, how many and where
to put it (them). The following is a summary as to the best I can figure it
out.
Firewall side I believe to be unnecessary as water will have been drained
via the purge. But there could be some water and I do need a filter one
never knows what gunk could have come into the tank.
Between the fuel pump and the firewall? This seems to imply that it should
be installed in the cabin and the fuel pump will be pumping unfiltered fuel.
Between the fuel selector valve and the fuel pump? Again this implies the
cabin plus the additional pressure loss as the fuel is pulled by the pump
through the Gascolator (dont know how much of an issue this could be)..
Question why not install two gascolators, one each between the wings and
the fuselage (assumes there is room)?
Pros better than a filter, low point, outside the cabin, easy access.
Cons additional complexity and cost additional pressure drop upstream of
pump.
Michèle
RV8 Wings
_____
From: dannylsmith [mailto:dsmit132@bellsouth.net]
Sent: Monday, December 06, 2004 7:38 PM
To: vansairforce@yahoogroups.com
Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel selector
Hi Paul,
Actually your gascolator is probably even more useful on a
taildragger since water could be behind your tank drains when sitting
on the ground. When you become airborne a small amount could be
picked by gascolator before reaching your engine. I agree no one
should have fuel lines going through the firewall more than once.
Take care,
Danny
--- In vansairforce@yahoogroups.com, "Paul Schattauer"
<chasm711@m...> wrote:
>
> Stein
>
> I'm not sure I'm following you. Are you saying some people design
fuel
> systems that pass through the firewall more than once? If so
that's nuts.
> A gascolator gives you one more filter and drain and two more
connectors, it
> is not necessary but some people like them. They live outside of
the
> fuselage, usually in the wing root or forward of the firewall.
They don't
> present much of a trap for water in a low wing tail dragger but
they do give
> you another filter.
>
> My gascolator lives low, forward of the firewall and is drained
with the
> cowl on. Fuel travels from the wings to the selector valve to the
high
> pressure filter to the electric pump through the firewall to the
gascolator
> to the engine driven pump to the fuel injection servo. Works. At
my first
> hundred hour inspection I found a little gooey fiber contamination
in the
> gascolator. I liked it better there then in my injectors
>
> Paul Schattauer
> RV8 808PS
> >From: "SteinAir, Inc." <flyboyyy@y...>
> >Reply-To: vansairforce@yahoogroups.com
> >To: vansairforce@yahoogroups.com
> >Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel
selector
> >Date: Mon, 06 Dec 2004 03:00:26 -0000
> >Hi Danny,
> >
> >Let me start by saying this isn't a flame at all, just some
> >constructive criticism (which I'm famous for) backed up by a little
> >experience.
> >
> >Using the gascolator as the "low point" in the fuel system is kind
> >of a misnomer. Actually, the low point in the fuel system
is/should
> >be the fuel sumps in the tanks. The fuel pickups are above the
> >bottom of the tank. Now, you're talking about water induced into
> >the system after the tanks, which could/might happen. That being
> >said, there are several areas on these planes where
> >adding "perceived" redundancy actually introduces more potential
> >failures; it's known as the point of diminishing returns and is not
> >the panacea it seems. In these cases, you actually increase your
> >risk of failure instead of decreasing it. Two systems which the
> >addition of the "pants/suspenders" perceived redundancy that don't
> >necessarily add factual redundancy are Fuel & Electrical.
> >
> >Here's the deal. You've taken a basically good system already and
> >added a bunch of complexity. Whether or not your gascolator is
> >upstream or downstream (I forgot to ask) of the AFP package doesn't
> >really matter, but read the following and see how it looks once you
> >see it on paper.
> >
> >You're taking fuel from the wings, then routing it into the
> >cockpit. Then, you're running it through a fuel selector, either
to
> >the AFP pump or to you gascolator. Here's where the added
> >complexity comes in.
> >
> >Now you run your fuel back outside the fuselage to the gascolator
> >(at high pressure from your AFP pump), next you route the fuel
> >through a gascolator, then you route the fuel back into the cockpit
> >forward to the firewall somewhere, where it once again exits the
> >cockpit (firewall) for final metering.
> >
> >Now you see where all of these extra fittings, the additional sump,
> >& fuel lines could add up to potential points of
failure/leaks/etc..
> >
> >I'm not trying to be negative here at all, just practical. Another
> >thing to keep in mind, gasoclators in high pressure injected
systems
> >don't always play well together (although many have used them) many
> >more have not for a whole host of reasons.
> >
> >Just a bit of my "2 cents". I'd take a close look at what that
> >gascolator is actually buying you in your particular installation.
> >The "belt/suspenders" analogy is a good one, but not when dealing
> >with fuel & electrical systems. If your belt OR suspenders fail,
> >your pants still stay on, but - if your fuel line breaks, leaks,
> >etc.., the additional fuel lines & gascolator won't help....
> >
> >A friendly "cheers",
> >Stein.
> >--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
> >wrote:
> > > Yes I'm using Van's AFP kit that includes the filter.
> >
> > > I'm using the gascolator for water removal and drainage. I'm
> >putting
> > > the gascolator between the fuselage and left wing down near the
> > > bottom of the wing where I can drain it thru a hole in the wing
> >gap
> > > seal. It will be at a very low point so water should be trapped
> > > there. Yes I know it like wearing a belt and suspenders but the
> >AFP
> > > filter is not there to collect water and if it did you can't
> >really
> > > check or drain it other than during an inspection or other
> > > maintenance. Certainly not before each flight.
> > >
> > > Danny
> > > > --- In vansairforce@yahoogroups.com, "dannylsmith"
> ><dsmit132@b...>
> > > > wrote:
> > > > > Plumbing the fuel lines to the Airflow performance pump and
to
> >an
> > > > > Andair gascolator between the fuselage and left wing is a
real
> > > > bear!
> > > > > Danny
> >Online help on this group at:
> >http://help.yahoo.com/help/groups/
> >
> >Yahoo! Groups Links
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Author: linn walters <lwalters2@...> Time: Wed Dec 8, 2004 5:07 am PST Link
Michèle Delsol wrote:
>To gascolate or not to gascolate, that is the question.
>
That leads to wars!!!
>I've been pondering the issue: Do I need one
>
IMHO, no.
> and if so, how many
>
One would be sufficient.
> and where to put it (them).
>
Ideally at the lowest point in the fuel system.
> The following is a summary as to the best I can figure it out.
>
>Firewall side I believe to be unnecessary as water will have been drained
>via the purge. But there could be some water and I do need a filter - one
>never knows what gunk could have come into the tank.
>
Almost all of the factory-builts have theirs placed there, prior to the
AFP, which is also on the firewall.
>Between the fuel pump and the firewall? This seems to imply that it should
>be installed in the cabin and the fuel pump will be pumping unfiltered fuel.
>
Going back to certified craft ..... but that doesn't mean that you have
to do it that way ...... the fuel route is typically fuel tanks (sump
drain here) to the selector, through the firewall to the gascolator (if
there is one) to the AFP (aux fuel pump) to the mechanical fuel pump to
the carb.
>Between the fuel selector valve and the fuel pump? Again this implies the
>cabin plus the additional pressure loss as the fuel is pulled by the pump
>through the Gascolator (don't know how much of an issue this could be)..
>
Let's look at where the sumps/filters are. Sumps in the wings get most
of the trapped water and solids. Some debris can get into the fuel
lines as the fuel sloshes around in the tank during flight ..... but
that should settle out in the gascolator ...... and the AFP has a screen
filter. Some carbs have a screen also. Injected systems have one as
well. Lots of places to contain the trash. Also, try and think where
the trash comes from. Your fuel farms/trucks have really good filters
and are required to service them regularly. But I digress
>Question - why not install two gascolators, one each between the wings and
>the fuselage (assumes there is room)?
>
PITA, IMHO. and an added cost that you don't need.
>Pros - better than a filter, low point, outside the cabin, easy access.
>
Let's say same as, rather than better. You can use an inline filter for
injected engines found at you local NAPA Aircraft Parts store ......
excellent filter and after 10 years ..... change it. It'll last forever
but 10 years gives you a warm fuzzy feeling.
>Cons - additional complexity and cost - additional pressure drop upstream of
>pump.
>
Agree, but inconsequential pressure drop. Also, the seal dries up and
must be replaced etc. You'd be much better off with a 'T' in the lowest
point, a short tube to catch water and some heavy particles, and a quick
drain to remove the offensive stuff. Just place the quick drain where
you can reach it easily otherwise it will tend to become ignored in a
preflight. IMHO, a gascolator is a good idea in principle ..... a
removeable bowl that you can clean and flushes out contaminents .....
but after initial cleaning from assembly debris (and there's a lot,
surprisingly) I don't find anything in them. Most everything seems to
get cought in the tank sumps.
Linn ...... sees sump wars on the horizon
>Michèle
>
>RV8 Wings
>
> _____
>
>From: dannylsmith [mailto:dsmit132@bellsouth.net]
>Sent: Monday, December 06, 2004 7:38 PM
>To: vansairforce@yahoogroups.com
>Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel selector
>Hi Paul,
>Actually your gascolator is probably even more useful on a
>taildragger since water could be behind your tank drains when sitting
>on the ground. When you become airborne a small amount could be
>picked by gascolator before reaching your engine. I agree no one
>should have fuel lines going through the firewall more than once.
>
>Take care,
>Danny
>--- In vansairforce@yahoogroups.com, "Paul Schattauer"
><chasm711@m...> wrote:
>>Stein
>>
>>I'm not sure I'm following you. Are you saying some people design
>fuel
>>systems that pass through the firewall more than once? If so
>that's nuts.
>>A gascolator gives you one more filter and drain and two more
>connectors, it
>>is not necessary but some people like them. They live outside of
>the
>>fuselage, usually in the wing root or forward of the firewall.
>They don't
>>present much of a trap for water in a low wing tail dragger but
>they do give
>>you another filter.
>>
>>My gascolator lives low, forward of the firewall and is drained
>with the
>>cowl on. Fuel travels from the wings to the selector valve to the
>high
>>pressure filter to the electric pump through the firewall to the
>gascolator
>>to the engine driven pump to the fuel injection servo. Works. At
>my first
>>hundred hour inspection I found a little gooey fiber contamination
>in the
>>gascolator. I liked it better there then in my injectors
>>
>>Paul Schattauer
>>RV8 808PS
>>>From: "SteinAir, Inc." <flyboyyy@y...>
>>>Reply-To: vansairforce@yahoogroups.com
>>>To: vansairforce@yahoogroups.com
>>>Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel
>selector
>>>Date: Mon, 06 Dec 2004 03:00:26 -0000
>>>Hi Danny,
>>>
>>>Let me start by saying this isn't a flame at all, just some
>>>constructive criticism (which I'm famous for) backed up by a little
>>>experience.
>>>
>>>Using the gascolator as the "low point" in the fuel system is kind
>>>of a misnomer. Actually, the low point in the fuel system
>is/should
>>>be the fuel sumps in the tanks. The fuel pickups are above the
>>>bottom of the tank. Now, you're talking about water induced into
>>>the system after the tanks, which could/might happen. That being
>>>said, there are several areas on these planes where
>>>adding "perceived" redundancy actually introduces more potential
>>>failures; it's known as the point of diminishing returns and is not
>>>the panacea it seems. In these cases, you actually increase your
>>>risk of failure instead of decreasing it. Two systems which the
>>>addition of the "pants/suspenders" perceived redundancy that don't
>>>necessarily add factual redundancy are Fuel & Electrical.
>>>
>>>Here's the deal. You've taken a basically good system already and
>>>added a bunch of complexity. Whether or not your gascolator is
>>>upstream or downstream (I forgot to ask) of the AFP package doesn't
>>>really matter, but read the following and see how it looks once you
>>>see it on paper.
>>>
>>>You're taking fuel from the wings, then routing it into the
>>>cockpit. Then, you're running it through a fuel selector, either
>to
>>>the AFP pump or to you gascolator. Here's where the added
>>>complexity comes in.
>>>
>>>Now you run your fuel back outside the fuselage to the gascolator
>>>(at high pressure from your AFP pump), next you route the fuel
>>>through a gascolator, then you route the fuel back into the cockpit
>>>forward to the firewall somewhere, where it once again exits the
>>>cockpit (firewall) for final metering.
>>>
>>>Now you see where all of these extra fittings, the additional sump,
>>>& fuel lines could add up to potential points of
>failure/leaks/etc..
>>>I'm not trying to be negative here at all, just practical. Another
>>>thing to keep in mind, gasoclators in high pressure injected
>systems
>>>don't always play well together (although many have used them) many
>>>more have not for a whole host of reasons.
>>>
>>>Just a bit of my "2 cents". I'd take a close look at what that
>>>gascolator is actually buying you in your particular installation.
>>>The "belt/suspenders" analogy is a good one, but not when dealing
>>>with fuel & electrical systems. If your belt OR suspenders fail,
>>>your pants still stay on, but - if your fuel line breaks, leaks,
>>>etc.., the additional fuel lines & gascolator won't help....
>>>
>>>A friendly "cheers",
>>>Stein.
>>>--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
>>>wrote:
>>>>Yes I'm using Van's AFP kit that includes the filter.
>>>>I'm using the gascolator for water removal and drainage. I'm
>>>putting
>>>>the gascolator between the fuselage and left wing down near the
>>>>bottom of the wing where I can drain it thru a hole in the wing
>>>gap
>>>>seal. It will be at a very low point so water should be trapped
>>>>there. Yes I know it like wearing a belt and suspenders but the
>>>AFP
>>>>filter is not there to collect water and if it did you can't
>>>really
>>>>check or drain it other than during an inspection or other
>>>>maintenance. Certainly not before each flight.
>>>>
>>>>Danny
>>>>>--- In vansairforce@yahoogroups.com, "dannylsmith"
>>><dsmit132@b...
>>>>>wrote:
>>>>>>Plumbing the fuel lines to the Airflow performance pump and
>to
>>>an
>>>>>>Andair gascolator between the fuselage and left wing is a
>real
>>>>>bear!
>>>>>>Danny
>>>Online help on this group at:
>>>http://help.yahoo.com/help/groups/
>>>
>>>Yahoo! Groups Links
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Author: Mickey Coggins <mc@...> Time: Wed Dec 8, 2004 5:04 am PST Link
>To gascolate or not to gascolate, that is the question.
Fuel injected engine or carbureted? A bit of fuel in the
system on a fuel injected system is not such a big deal. It
is more so for a carburetor. I'm not going to use a
gascolator, but a good 100 micron pre-filter before the
fuel pump, and a 10 micron filter after the fuel pump. I'll
get the water out of the tank sumps, if there is any, and
any other water will just blow through.
Here is a good article I found somewhere that discusses some
of these issue:
http://www.rv8.ch/staticpages/index.php?page=20030914230507849
Mickey
Mickey Coggins
http://www.rv8.ch/
#82007 QB Wings/Fuselage
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Author: "Steve Raddatz" <n667sr@...> Time: Wed Dec 8, 2004 7:04 am PST Link
On my first 8 I had a gascolator and what I would have to do after I sumped
the tanks was reach in the cockpit and turn on the master and then the fuel
pump so I could get something out of the gascolator otherwise it would be
empty.
On my second 8 I thought why should I sump the tanks and then pump fuel from
the tanks I just sumped to the gascolator only to resump the same fuel, so
after about 5 seconds of thinking about it and saying to myself if I get rid
of the gascolator I get rid of two more fitting something else that could go
wrong and I'll be able to maybe keep the fuel cooler not having to go
through the heat soaked gascolator. After 200 hrs. no problems
On the 8 I'm building now, that gascolator wasn't even considered.
FYI, All of my 8's have been fuel injected and all of them have a screen at
the fuel injector from the factory so the gascolator isn't your last chance
to catch crap.
Steve Raddatz
----- Original Message -----
From: "linn walters" <lwalters2@cfl.rr.com>
To: <vansairforce@yahoogroups.com>
Sent: Wednesday, December 08, 2004 7:00 AM
Subject: Re: [VAF Mailing List] Re: Gascolator - was New Andair fuel
selector
Michèle Delsol wrote:
>To gascolate or not to gascolate, that is the question.
>
That leads to wars!!!
>I've been pondering the issue: Do I need one
>
IMHO, no.
> and if so, how many
>
One would be sufficient.
> and where to put it (them).
>
Ideally at the lowest point in the fuel system.
> The following is a summary as to the best I can figure it out.
>
>Firewall side I believe to be unnecessary as water will have been drained
>via the purge. But there could be some water and I do need a filter - one
>never knows what gunk could have come into the tank.
>
Almost all of the factory-builts have theirs placed there, prior to the
AFP, which is also on the firewall.
>Between the fuel pump and the firewall? This seems to imply that it should
>be installed in the cabin and the fuel pump will be pumping unfiltered
>fuel.
>
Going back to certified craft ..... but that doesn't mean that you have
to do it that way ...... the fuel route is typically fuel tanks (sump
drain here) to the selector, through the firewall to the gascolator (if
there is one) to the AFP (aux fuel pump) to the mechanical fuel pump to
the carb.
>Between the fuel selector valve and the fuel pump? Again this implies the
>cabin plus the additional pressure loss as the fuel is pulled by the pump
>through the Gascolator (don't know how much of an issue this could be)..
>
Let's look at where the sumps/filters are. Sumps in the wings get most
of the trapped water and solids. Some debris can get into the fuel
lines as the fuel sloshes around in the tank during flight ..... but
that should settle out in the gascolator ...... and the AFP has a screen
filter. Some carbs have a screen also. Injected systems have one as
well. Lots of places to contain the trash. Also, try and think where
the trash comes from. Your fuel farms/trucks have really good filters
and are required to service them regularly. But I digress
>Question - why not install two gascolators, one each between the wings and
>the fuselage (assumes there is room)?
>
PITA, IMHO. and an added cost that you don't need.
>Pros - better than a filter, low point, outside the cabin, easy access.
>
Let's say same as, rather than better. You can use an inline filter for
injected engines found at you local NAPA Aircraft Parts store ......
excellent filter and after 10 years ..... change it. It'll last forever
but 10 years gives you a warm fuzzy feeling.
>Cons - additional complexity and cost - additional pressure drop upstream
>of
>pump.
>
Agree, but inconsequential pressure drop. Also, the seal dries up and
must be replaced etc. You'd be much better off with a 'T' in the lowest
point, a short tube to catch water and some heavy particles, and a quick
drain to remove the offensive stuff. Just place the quick drain where
you can reach it easily otherwise it will tend to become ignored in a
preflight. IMHO, a gascolator is a good idea in principle ..... a
removeable bowl that you can clean and flushes out contaminents .....
but after initial cleaning from assembly debris (and there's a lot,
surprisingly) I don't find anything in them. Most everything seems to
get cought in the tank sumps.
Linn ...... sees sump wars on the horizon
>Michèle
>
>RV8 Wings
>
> _____
>
>From: dannylsmith [mailto:dsmit132@bellsouth.net]
>Sent: Monday, December 06, 2004 7:38 PM
>To: vansairforce@yahoogroups.com
>Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel selector
>Hi Paul,
>Actually your gascolator is probably even more useful on a
>taildragger since water could be behind your tank drains when sitting
>on the ground. When you become airborne a small amount could be
>picked by gascolator before reaching your engine. I agree no one
>should have fuel lines going through the firewall more than once.
>
>Take care,
>Danny
>--- In vansairforce@yahoogroups.com, "Paul Schattauer"
><chasm711@m...> wrote:
>>Stein
>>
>>I'm not sure I'm following you. Are you saying some people design
>fuel
>>systems that pass through the firewall more than once? If so
>that's nuts.
>>A gascolator gives you one more filter and drain and two more
>connectors, it
>>is not necessary but some people like them. They live outside of
>the
>>fuselage, usually in the wing root or forward of the firewall.
>They don't
>>present much of a trap for water in a low wing tail dragger but
>they do give
>>you another filter.
>>
>>My gascolator lives low, forward of the firewall and is drained
>with the
>>cowl on. Fuel travels from the wings to the selector valve to the
>high
>>pressure filter to the electric pump through the firewall to the
>gascolator
>>to the engine driven pump to the fuel injection servo. Works. At
>my first
>>hundred hour inspection I found a little gooey fiber contamination
>in the
>>gascolator. I liked it better there then in my injectors
>>
>>Paul Schattauer
>>RV8 808PS
>>>From: "SteinAir, Inc." <flyboyyy@y...>
>>>Reply-To: vansairforce@yahoogroups.com
>>>To: vansairforce@yahoogroups.com
>>>Subject: [VAF Mailing List] Re: Gascolator - was New Andair fuel
>selector
>>>Date: Mon, 06 Dec 2004 03:00:26 -0000
>>>Hi Danny,
>>>
>>>Let me start by saying this isn't a flame at all, just some
>>>constructive criticism (which I'm famous for) backed up by a little
>>>experience.
>>>
>>>Using the gascolator as the "low point" in the fuel system is kind
>>>of a misnomer. Actually, the low point in the fuel system
>is/should
>>>be the fuel sumps in the tanks. The fuel pickups are above the
>>>bottom of the tank. Now, you're talking about water induced into
>>>the system after the tanks, which could/might happen. That being
>>>said, there are several areas on these planes where
>>>adding "perceived" redundancy actually introduces more potential
>>>failures; it's known as the point of diminishing returns and is not
>>>the panacea it seems. In these cases, you actually increase your
>>>risk of failure instead of decreasing it. Two systems which the
>>>addition of the "pants/suspenders" perceived redundancy that don't
>>>necessarily add factual redundancy are Fuel & Electrical.
>>>
>>>Here's the deal. You've taken a basically good system already and
>>>added a bunch of complexity. Whether or not your gascolator is
>>>upstream or downstream (I forgot to ask) of the AFP package doesn't
>>>really matter, but read the following and see how it looks once you
>>>see it on paper.
>>>
>>>You're taking fuel from the wings, then routing it into the
>>>cockpit. Then, you're running it through a fuel selector, either
>to
>>>the AFP pump or to you gascolator. Here's where the added
>>>complexity comes in.
>>>
>>>Now you run your fuel back outside the fuselage to the gascolator
>>>(at high pressure from your AFP pump), next you route the fuel
>>>through a gascolator, then you route the fuel back into the cockpit
>>>forward to the firewall somewhere, where it once again exits the
>>>cockpit (firewall) for final metering.
>>>
>>>Now you see where all of these extra fittings, the additional sump,
>>>& fuel lines could add up to potential points of
>failure/leaks/etc..
>>>I'm not trying to be negative here at all, just practical. Another
>>>thing to keep in mind, gasoclators in high pressure injected
>systems
>>>don't always play well together (although many have used them) many
>>>more have not for a whole host of reasons.
>>>
>>>Just a bit of my "2 cents". I'd take a close look at what that
>>>gascolator is actually buying you in your particular installation.
>>>The "belt/suspenders" analogy is a good one, but not when dealing
>>>with fuel & electrical systems. If your belt OR suspenders fail,
>>>your pants still stay on, but - if your fuel line breaks, leaks,
>>>etc.., the additional fuel lines & gascolator won't help....
>>>
>>>A friendly "cheers",
>>>Stein.
>>>--- In vansairforce@yahoogroups.com, "dannylsmith" <dsmit132@b...>
>>>wrote:
>>>>Yes I'm using Van's AFP kit that includes the filter.
>>>>I'm using the gascolator for water removal and drainage. I'm
>>>putting
>>>>the gascolator between the fuselage and left wing down near the
>>>>bottom of the wing where I can drain it thru a hole in the wing
>>>gap
>>>>seal. It will be at a very low point so water should be trapped
>>>>there. Yes I know it like wearing a belt and suspenders but the
>>>AFP
>>>>filter is not there to collect water and if it did you can't
>>>really
>>>>check or drain it other than during an inspection or other
>>>>maintenance. Certainly not before each flight.
>>>>
>>>>Danny
>>>>>--- In vansairforce@yahoogroups.com, "dannylsmith"
>>><dsmit132@b...
>>>>>wrote:
>>>>>>Plumbing the fuel lines to the Airflow performance pump and
>to
>>>an
>>>>>>Andair gascolator between the fuselage and left wing is a
>real
>>>>>bear!
>>>>>>Danny
>>>Online help on this group at:
>>>http://help.yahoo.com/help/groups/
>>>
>>>Yahoo! Groups Links
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Author: Michèle Delsol <michele.delsol@...> Time: Thu Dec 9, 2004 3:32 am PST Link
Mickey and Linn,
Thanks for the feedback good points will have to ponder some more it
is a balance between KISS, safety and overkill.
Michèle
_____
From: Mickey Coggins [mailto:mc@rv8.ch]
Sent: Wednesday, December 08, 2004 1:32 PM
To: vansairforce@yahoogroups.com
Subject: [VAF Mailing List] Gascolator - was New Andair fuel selector
>To gascolate or not to gascolate, that is the question.
Fuel injected engine or carbureted? A bit of fuel in the
system on a fuel injected system is not such a big deal. It
is more so for a carburetor. I'm not going to use a
gascolator, but a good 100 micron pre-filter before the
fuel pump, and a 10 micron filter after the fuel pump. I'll
get the water out of the tank sumps, if there is any, and
any other water will just blow through.
Here is a good article I found somewhere that discusses some
of these issue:
http://www.rv8.ch/staticpages/index.php?page=20030914230507849
Mickey
Mickey Coggins
http://www.rv8.ch/
#82007 QB Wings/Fuselage
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