Subject: EFI Fuel feeding system
From: Rotary Engine
Date: 11/11/2006, 10:20 PM
To: AA-me



Hello Paul,

This is what I plan to do as fuel system:

In Canada we must have a gascolator, a valve to cut fuel from each tank,
a filter in front EFI pumps and a primer pump in front of EFI pumps.

Basically, I draw fuel from the left tank and when fuel is getting low I
turn the right ball valve on and start the right Facet pump running from the
right side and filling the left tank. When level is fine I turn off the
right Facet and the right ball valve.
The left Facet is off unless fuel pressure is low, climbing and landing. If
the right Facett fails when filling the left tank then I would turn off the
left facet pump if it is on and the left ball valve to make sure the fuel is
pulled from the right tank.

Can you see problems with this system?

Thanks Paul,

JP

It is too hard to manage fuel using this system. Too prone
to pilot error.

You are returning fuel to only one tank. The left side.
If you withdraw fuel from just the right tank you will
rapidly run out of fuel in that tank or pump fuel overboard
through the left tank vent line. As much as 80% of the fuel
is returned in some circumstances.

You need a TWO level valve that switches both the feed
AND the return lines so fuel is always returned to the
tank it is drawn from.

Don't nickel and dime the fuel system plumbing. Spend some money
and get the right two level valve.

If you have a pusher system you need one or two properly designed
sump tanks as well.

Engines stop for two main reasons. Lack of fuel and lack
of spark. Don't get creative with the fuel plumbing.
Use what is proven to work.

BTW please don't send doc files. Screen capture them and send
them as jpg's.

Paul Lamar ...No rotor no motor.

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