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Date: Mon, 30 May 2005 16:09:25 -0500
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: will EFI pumps pump air
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Russell Duffy wrote:

>   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)  

Which leg of the T has the Facet? (see prior posts by Bill & me about 
jet pumps)

Charlie