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Message-ID: <4E48AE3E.8050105@nc.rr.com>
Date: Mon, 15 Aug 2011 01:27:26 -0400
From: Ernest Christley <echristley@nc.rr.com>
Reply-To: echristley@att.net
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Dennis Haverlah Fuel System...or any others, for
 that matter.
References: <list-5092051@logan.com>
In-Reply-To: <list-5092051@logan.com>
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On 08/14/2011 10:17 PM, DLOMHEIM@aol.com wrote:
> >I have the fuel system Kelly described in my RV-7A.
> Hey Dennis:
> I shot quite a few shots of your engine install at Tracy back in 07 
> (?) but don't have a shot of how you ran your orificed return...if you 
> have a shot of that could you post it here?
>

All this talk of having a pressure bleed for the fuel system made me go 
out and modify mine.  If you have an Aeromotive style pressure regulator 
(I'm using model 13001), you might want to consider what I did.

The regulator is composed of a base with an inlet on each side for 
pressurized fuel.  The top portion is held to the base with 4 screws, 
and contains a spring that pushes a steel ball down onto a post sticking 
up from the middle of the base.  An adjustment screw pushes on the 
spring, controlling how much pressure is needed before the ball is 
pushed off the base and fuel allowed to flow through the hole that goes 
through the post sticking up from the middle of the base.

I removed the 4 screws, wrapped up the base in some shop rags, leaving 
just the top of the post exposed, then used a cut-off wheel in my Dremel 
to make a deep scratch in the steel ball's seat on the top of the post.

I put it all back together, tested that the pumps made 60psi, regulated 
it back down to 50, then watched the pressure bleed off in about 5 
seconds after I switched the pumps off.  Then I went in the house to 
recover from the gas fumes.

This method doesn't add any weight, connections or extra hose, but is 
100% effective at relieving the fuel line pressure on shutdown.

This method

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    On 08/14/2011 10:17 PM, <a class="moz-txt-link-abbreviated" href="mailto:DLOMHEIM@aol.com">DLOMHEIM@aol.com</a> wrote:
    <blockquote cite="mid:list-5092051@logan.com" type="cite">
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        <div>&gt;I have the fuel system Kelly described in my RV-7A.</div>
        <div>&nbsp;</div>
        <div>Hey Dennis:</div>
        <div>&nbsp;</div>
        <div>I shot quite a few shots of your engine install at Tracy
          back in 07 (?) but don't have a shot of how you ran your
          orificed return...if you have a shot of that could you post it
          here?</div>
        <div>&nbsp;</div>
      </font><br>
    </blockquote>
    <br>
    All this talk of having a pressure bleed for the fuel system made me
    go out and modify mine.&nbsp; If you have an Aeromotive style pressure
    regulator (I'm using model 13001), you might want to consider what I
    did.&nbsp; <br>
    <br>
    The regulator is composed of a base with an inlet on each side for
    pressurized fuel.&nbsp; The top portion is held to the base with 4
    screws, and contains a spring that pushes a steel ball down onto a
    post sticking up from the middle of the base.&nbsp; An adjustment screw
    pushes on the spring, controlling how much pressure is needed before
    the ball is pushed off the base and fuel allowed to flow through the
    hole that goes through the post sticking up from the middle of the
    base.<br>
    <br>
    I removed the 4 screws, wrapped up the base in some shop rags,
    leaving just the top of the post exposed, then used a cut-off wheel
    in my Dremel to make a deep scratch in the steel ball's seat on the
    top of the post.<br>
    <br>
    I put it all back together, tested that the pumps made 60psi,
    regulated it back down to 50, then watched the pressure bleed off in
    about 5 seconds after I switched the pumps off.&nbsp; Then I went in the
    house to recover from the gas fumes.<br>
    <br>
    This method doesn't add any weight, connections or extra hose, but
    is 100% effective at relieving the fuel line pressure on shutdown.<br>
    <br>
    This method <br>
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