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From: <ronmilligan@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: will EFI pumps pump air
Date: Mon, 30 May 2005 16:44:35 -0400
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I mounted my Facet on the floor below the fuel selector.  I also put a one way valve in.  Maybe mine won't have your problem.

Ron Milligan
RV7

> 
> From: "Russell Duffy" <13brv3@bellsouth.net>
> Date: 2005/05/30 Mon PM 03:53:14 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: will EFI pumps pump air
> 
>   You *have* replicated my system because I also "T" the transfer pump into
> the EFI return line to feed tank.   It has no problem transferring fuel with
> this arrangement.  Facet makes these pumps in several different pressure
> ranges.  I think mine is the 4-6 psi model.   I used 3/8" line in this
> portion of system.  Did you use something smaller? 
>  
> Hi Tracy,
>  
> That's interesting, because I didn't recall that you Teed yours also.  One
> difference I know we've discussed is the fact that you were smart enough to
> run your return line to the top outboard end of the tank, so it wouldn't be
> submerged.  Mine is just a fitting on the removable cover where the fuel
> level sender is.  That causes me some problems with the fuel wanting to seek
> a common level between tanks when it's more than about half full, but I
> doubt it's the return problem.  
>  
> I believe my pump is a 4-6 psi version, but I'd have to look to be sure.
> The whole fuel system is AN-6 (3/8") line, with the exception of the tank
> vents, which are AN-4 I believe.  
>  
> I also connect my transfer pump near the top of the fuselage, so the facet
> has to push the fuel a couple feet uphill, to where it meets the return
> line.  Perhaps that, and the one way check valve I just installed are just
> too much for it.  What I need is a pump the same size as what I have, but in
> about 10-15 psi.  Seems like I looked, but couldn't find any such animal.  
>  
> Thanks,
> Rusty (off to remove the VW engine from the Sonerai... long story, but I
> still have two unflyable planes)  
> 
>