Message-ID: <3FDF34E1.BA228FED@frontiernet.net>
Date: Tue, 16 Dec 2003 10:37:53 -0600
From: Jim Sower <canarder@frontiernet.net>
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Fuel system
References: <list-2892790@logan.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

<... not sure how quickly they would level if fuel was returned to only one
tank ...>
Depends on tubing size and some intangibles like fuel cap seal, crabbing etc.
My Velocity has a 5-gal sump gravity fed from the strakes with 3/8" ID tubing
with engine fed from sump.  I've been putzing with it for a couple of years
trying to make it feed symmetrically.  I've gotten to where the Left tank only
has 3 or 4 gals in it when the Right tank gets empty.  This is a common problem
in configurations of this type.  I think you'd be better off with positive
control over delivery from the wings - perhaps something similar to what I
described in a recent post.

That's how it works for me ... Jim S.

Joseph Berki wrote:

> Thanks for the response on fuel system ideas.  Rusty explained the
> secondary rail and I hope I got this right.  Fuel is delivered at pressure
> to primary injector rail then to secondary rail then to regulator which
> feeds the return line back to the tank.  My thinking was that i intended to
> connect both strake tanks together with a tunnel and a sump in the center
> where fuel would be pumped to the rail system.  Even though the tanks are
> connected I was not sure how quickly they would level if fuel was returned
> to only one tank.  I was thinking of splitting the rail system into two and
> returning to both tanks ie forward rotor to port tank and rear rotor to
> starboard tank.  If the fuel could level on all conditions then the fuel
> could be returned to one tank.  To implement this you would need two
> primary rails two secondary rails and two regulators.  I may not need to
> split the rail system.
>
> Joe Berki
> Limo EZ
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

--
Jim Sower
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T