I was looking through the Lancair Legacy manual pdf
and found this fuel pump. Anybody know what brand it is?
Apparently it has the pressure regulator
built in. Since it is a mechanical fuel injection system I don't
know what the system pressure is yet.
Sure simplifies the low wing fuel plumbing and loses the external
pressure
regulator. The two layer selector valve is still used to reroute
the return fuel to the tank that is being drawn from.
An essential feature.

Paul Lamar ...No rotor no motor.

Paul,
I think it is a Dukes pump, AKA 2-speed Continental fuel pump.  You can
get one from Lancair for $745.

Mark S.


Is that all? :) Do you know the system pressure Mark?
Of course you will pay a couple of hundred for a good fuel
pressure regulator anyway.

Paul Lamar ...No rotor no motor.


Paul,
Not sure of the pressure, but I was told that Continental fuel injection
systems run significantly lower pressures than auto systems.  I don't
have any sources to verify that though.

With the Dukes pump, wouldn't you still have the same problem with air
getting trapped between the tank and the fuel rail causing engine
stoppage?  This is why I installed a bleeder circuit that bypasses the
regulator.  Tests show that it solves that problem.  I read a flight
report done during the 40-hour fly-off period of an ES that almost had
to do an emergency landing on I-70 in Colorado after intentionally
running a tank dry, and then being unable to get a restart.  Activating
the high pressure circuit of the Dukes pump finally got it started.

Mark S.


Yes I guess you could get air trapped between the pump
and the injectors but it should escape through the injectors
when they are pulsed. On the other side of the pump it
is a different story.

High pressure pumps are notoriously hard to prime. That is why
they must be as close to the tank as possible.
The ultimate is having the pump in the tank like they
do it in the automotive world.

Paul Lamar ...No rotor no motor.

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