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From: "Leon" <peon@pacific.net.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-744273@logan.com>
Subject: For Bob Re: AN-3 Fittings was  [FlyRotary] Return Fuel Line Sizes Clarification
Date: Sat, 19 Feb 2005 07:20:41 +1100
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Yo Bob,

Just curious as to why you are using AN -3 fittings on a fuel system.?.
They are brake line size. If you use AN-6,  the I.D is 5/16,  which is ideal
for your app.  So why the AN-3 fittings??

Cheers mate,

Leon


----- Original Message ----- 
From: "Bob White" <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, February 19, 2005 2:12 AM
Subject: [FlyRotary] Return Fuel Line Sizes Clarification


>
> Thanks again Leon.
>
> That's a good point about the EFI pump outlet size.  I bought my pumps
> from Tracy and they have 5/16 inch hose barbs on the inlet and outlet.
> The outlet is threaded 3/8-24 so I ordered two AN-3 to AN-6 adapters
> (two pumps).  Back in January Jim Sower reported finding them at XRP.
> The AN-3 side only has a 1/8 inch hole, but since I'm using an 'O'-ring
> to seal, not the cone, I can drill them out to at least the ID of the
> 5/16 inch hose barb.  If that's more than 1/4 inch, I will just drill
> them at 1/4 inch.  It looks like I'm in good shape to just use a
> standard EFI setup.
>
> Bob White
>
> On Fri, 18 Feb 2005 20:24:10 +1100 "Leon"
> <peon@pacific.net.au> wrote:
>
> > Hi Bob,
> >
> > Thanks for the comments.  Upon re-reading what I wrote,  I do need to
> > clarify what I wrote last post.  I should have been a little more
succinct
> > in my statements,  as it sort of conveys a meaning slightly different to
> > that which I had intended.
> >
> <snip>
> > The reason for this is that when you look at the OUTLET of most factory
EFI
> > high pressure pumps,  the INSIDE diameter of outlet nipple on the pump
is
> > quite tiny,  which is why I usually can get away with using 1/4" return
> > lines.  The ID of the pump output nipple is the thing that limits the
flow
> > capacity of the whole system.
> >
>
> > Cheers,
> >
> > Leon
> >
> >
>
> ><snip>
> > >
>
> -- 
> http://www.bob-white.com
> N93BD - Rotary Powered BD-4 (real soon)
>
> >>  Homepage:  http://www.flyrotary.com/
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