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.



Ok, so apparently add another thing I need to plumb into the fuel
delivery system -- a pressure regulator.  It's a real problem that I am
so clueless on EFI fuel delivery system design -- I keep discovering
things I need.  This area is a missing piece on the website, Paul -- not
a word to be found.  What little I have found elsewhere on the web is of
little use as well.  Ah well... I suppose I will muddle through it all
eventually.

Here's my design so far -- those who have a clue, please chime in & tell
we where I am going astray...

Mark

Very important. Please ask. Not everything is on the web site
yet. Mark Wrathal has a good do's and don'ts  on his web site.

http://members.aon.at/wrathall/rotary/

Looks like the high pressure pumps need to go next to
the shut off valve before the gascolater. The one way valves
are built into the pumps. What brand of pump are you
using?

Paul Lamar ...No rotor no motor.

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