I wonder if the temp of the fuel in the 'short-circuit' is still kept
low enough to avoid vapour-lock on hot days (versus taking the cooler
fuel from the tank)?
Curious,
Pete
-----Original Message-----
From: Steve Hagar [mailto:hagargs@earthlink.net]
Subject: RE: Europa-List: Mounting fuel pumps
Kevin:
Yes the 303-6 hose clamps up nicely to the pump outlet. I bought a
mandral
---From Wicks Aircraft it is $10 cheaper than the unit in AC Spruce. This
is
not a recommended tool as noted in the AC Spruce catalog it is a
required
tool if you are to install the fittings right. The fittings go in so
tight
to the hose that it really inspires confidence in the integrity of the
joint.
I was originally told that the 914 pumps had check valves in them. Upon
obtaining them and investigating by pumping gasoline from one backwards
into the other this was found not to be the case. So make sure you
account
for this and install some check valves. Just don't buy them from Wicks.
I
got a pair and they have been sitting around since 1959! (just about as
old
as me). These things were real relics. I now know how things were
packaged befor plastic was real popular. There was no problems with
Wicks
taking them back and crediting me. I even gave them the opportunity to
send me some newer ones but they said all of the ones they had were that
old. They must have gotten a good deal from some govt surplus sale.
Using this hose and fittings is indeed not cheap. Its easy to burn a
C-note and just get started with the job.
I was talking to Erich Trombley who just launched his plane recently
about
fuel systems and he has come up with a novel way to implement a fuel
totalizer without having to have a flow sensor on the return line. If I
understand it right He put a "T" upstream of both pump inlets and hooked
the return line into the supply line. Then he put a check valve ahead of
this so that the fuel can't be pumped back into the tank. He's got quite
a
few hours on the plane now and says the fuel burn indications are right
on
the money.
I may try this out after getting a heads up from him after some extended
usage.
Steve
A143
Mesa, AZ
>
<kevann@gte.net>
>
> Steve, Did you fit the 303 hose on the pumps outlets and hose clamp
them?
> Did you get the aeroquip mandrel for the 491 fittings?
> The 303 looks like a very good choice, better be for the price eh?
> I too am trying to get this wrapped up before the top goes on. I just
got
> word that my 914 is on its way! John Hurst kindly sent me a retired
fuel
> pump to help get this plumbing madness figured out. I'd be glad to
pass it
> on if anybody could use a model 914 pump.
> Thanks, Kevin Klinefelter A211
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com]On Behalf Of Steve
Hagar
> To: Europa-List@Matronics. Com
> Subject: RE: Europa-List: Mounting fuel pumps
>
<hagargs@earthlink.net>
>
>
> Kevin:
>
> I just finished my fuel system prior to putting the top on. To mount
the
> fuel pump I took a piece of .090 aluminum sheet about 2"X4". Put a
nutplate
> in it for the hose clamp that comes with the pumps. I spaced it off of
the
> bottom of the fuselage floor with a couple of small pieces of foam to
give
> the screw clearance and filled and bonded the remaining space with
some
> redux and flox. I mounted one pump like that the other pumps clamp
was
> bolted through one of the plywood bulkheads for the baggage bay. That
way
> the pumps are spaced apart far enough apart to put a t between them
and
not
> have a tight bend radius bewteen the hoses. Both pumps are still
visible
> when I remove the left baggage access panel.
>
> I stayed away from using barbs on the pressurized side of the fuel
system
> (other than the barb on the pump's outlets) I used Aeroquip 303 hose
and
> the 491 flared hose fittings. You need a hacksaw to cut this stuff,
whereas
> you can clip the Europa supplied stainless braided hose with a set of
dykes!
>
> Steve Hagar
> A143
> Mesa, AZ
>
> > [Original Message]
> > From: Kevin Klinefelter <kevann@gte.net>
> > To: Europa-List@Matronics. Com <europa-list@matronics.com>
> > Date: 3/1/03 12:30:24 PM
> > Subject: Europa-List: Mounting fuel pumps
> >
<kevann@gte.net>
> >
> > Hi all, does anyone have good way of mounting the 914 fuel pumps to
the
> > floor behind the baggage bay?
> > Also, I have the Andair mini gascolator and fitted a 1/2" hose barb
to
> the
> > outlet. The next connector will be a tee of 1/2" barbs to split off
to
> the 2
> > fuel pumps. This eliminates the need for the 2 J1006 reducers. I
found a
> > nylon tee fitting that will work, but I'd rather get a metal one
like
the
> > WTP002 provided in the kit. Anyone know where to get a 1/2" hose
barb
Tee
> > fitting that is not plastic? I'm trying to reduce the number of
> connections
> > as much as possible.
> >
> >
>
>
> --- Steve Hagar
> --- hagargs@earthlink.net
>
>
>
>
>
--- Steve Hagar
--- hagargs@earthlink.net
|