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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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