Hi! Duncan
Yes I understand but of course there is generally a "head" assisting the
suction side of the pumps since they are on the belly plate. My reserve
side is my main fall back system but at least the gascolator filters do
allow for quite a volume of contamination before blocking and regular
water drain checks AND gascolator drain checks should give adequate
insurance.
My previous experiences of blockage was the "dog hair and cloth fibres"
in a bad drilling intersection of the Europa Tank Connectors. Now with
Graham Singleton's connectors fitted at least the "crud" gets through to
the gascolators . I'm no longer using the gauze type finger filters but
brass tubular with many holes drilled and deburred so as not to catch
the fibres etc. Still I had the problem with water and rust which I
believe I picked up in Europe. I use white plastic drums to fill locally
with visual inspection of the drum bottom prior to using one of Alan
Burrows electric pumps which doesn't reach the bottom anyway.
However it still didn't show in the tank water drains. When I ground the
a/c soon for the Mode S fiasco I will have the tank top off and do wipe
out.
At least the gascolators will accommodate a reasonable volume of water
before blocking, if "REASONABLE" IS THE WORD!
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Duncan &
Ami McFadyean
Sent: 03 November 2008 11:04
Subject: Re: Europa-List: fuel pump etc
<ami@mcfadyean.freeserve.co.uk>
Depends on the type of pump.
A roller-cell pump (914 etc) is very intolerant of dirt (it scores the
traces in the pump). The shuttle type pump (eg Facet) is far more
tolerant.
Both types of pump are much better at pushing than pulling; so any
partial
blockage of a filter on the suction side will test the ability of the
pump
to suck (typically a maximum suction head of 0.6m is quoted for roller
cell
pumps; much of this allowance can be used up with high flow rates and
the
tortuous plumbing frequently seen). This is asking for trouble,
particularly
if Mogas is being used.
Duncan McF.
----- Original Message -----
From: "Robert C Harrison" <ptag.dev@tiscali.co.uk>
Sent: Monday, November 03, 2008 9:54 AM
Subject: RE: Europa-List: fuel pump etc
>
> <ptag.dev@tiscali.co.uk>
>
> Hi! Rowland
> Don't know about "ahead" of fuel pump for gascolator. But IMHO in
> direction of flow terms the gascolator needs to be between tank and
pump
> (Of course in this context "ahead" may be the same). The last thing
you
> need in the pump is unfiltered fuel.
> Regards
> Bob H G-PTAG
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Rowland &
> Wilma Carson
> Sent: 02 November 2008 22:54
> To: europa-list@matronics.com
> Subject: Re: Europa-List: fuel pump etc
>
> <rowil@clara.net>
>
>
>>This is what I did.....
>
> Mike - thanks for the nice pictures. The layout looks neat ....
>
> But shouldn't the gascolator be ahead of the fuel pump in the
sequence?
>
> And all the advice I've seen is that the pump wants to be mounted at
> 45 degrees, or at least have its inlet lower than its outlet.
>
> regards
>
> Rowland
> --
> | Wilma & Rowland Carson http://home.clara.net/rowil/
> | <rowil@clara.net> ... that's Rowland with a 'w' ...
>
>
>
|