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Date: Fri, 18 Feb 2005 14:43:50 -0600
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Water in the fuel
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I've drained some scary amounts of water out of fuel tanks in my EZ and 
Velocity.  I've also worked on a lot of cars that stopped abruptly from 
water contamination in the fuel.  I have suspended water in fuel with 
enough agitation, but in my experience it settles right out again.

I take water very seriously and will continue to do so ... Jim S.

daveleonard@cox.net wrote:

>When well mixed with the fuel, water does not create a problem.  It is only when the water separates out and displaces the fuel that there is a problem.  With the high flow fuel systems we have (unless you are using a returnless system), there is no need to drain the fuel on preflight.  Any accumulated water will get sent back to the tank and mixed with the fuel.
>
>I never drain my fuel.  I even took out the drain plugs.
>
>JMHO,
>Dave Leonard
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>>Fine, but what kind of filters are you using and where are they in the 
>>system?  Gascolator is NOT a suitable substitute for a filter.
>>I have a "flat bottomed" sump on my Velocity, and water DOES accumulate 
>>in it.  My fuel line to the pumps is cheated up off the bottom of the 
>>tank half an inch and there's a test drain in the bottom of the sump to 
>>check for water.  One of these days I'm going to make a little "blister" 
>>in the bottom of the sump where water will accumulate so I can get it 
>>ALL out without removing the sump and shaking it for twenty minutes.
>>It all counts, and some of it counts /against /us ... Jim S.
>>
>>Paul wrote:
>>
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>>>Hi, Wendell....I use the gascolator for a couple of reasons. I cannot 
>>>check my aluminum sump tank.  It is sealed. Since the EFI pumps are 
>>>located lower than the sump tank, it would be more logical to check 
>>>for water at the lowest point in the fuel system.  The fuel goes from 
>>>the sump tank to the gascolator, which is the lowest point in the fuel 
>>>system. I like the gascolator because it has a screen to catch debris 
>>>that might have found it's way to the EFI pumps, and the gascolator 
>>>has a fuel drain on the bottom of it so that I can check for water at 
>>>the lowest point in the system.  I don't think the sump would 
>>>catch the water, as the outlet from the sump is on the bottom of the 
>>>sump, and water should go right on through the sump tank to the 
>>>gascolator and EFI pumps, which are the lowest point in the fuel 
>>>system. I thought this was the best way to design a gravity fed fuel 
>>>system....everything downhill and a fuel drain at the lowest point.  
>>>Please correct me if I am in error.  Paul looking for a Cessna Conner 
>>>
>>>    ----- Original Message -----
>>>    *From:* Wendell Voto <mailto:jwvoto@itlnet.net>
>>>    *To:* Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
>>>    *Sent:* Thursday, February 17, 2005 10:59 AM
>>>    *Subject:* [FlyRotary] Re: Vapor Lock
>>>
>>>    Paul,
>>>    Why use a gasolator if you have a sump tank with the outlet a
>>>    couple inches off the bottom of the sump? Won't the sump tank
>>>    catch the water and a strainer stop the big stuff. The sump is
>>>    checked before each flight and a gasolator isn't. Go straight to
>>>    the FP then thru a fuel filter and then the fuel rail. Eliminates
>>>    the restriction, weight and connections to leak. I am beginning to
>>>    lean towards in-tank pumps with built in strainer since all this
>>>    has come to light.
>>>    Wendell
>>>
>>>        Hi, Kelly....the efi pumps are the last item before the fuel
>>>        rail and fuel pressure regulator. Here is the basic system... 
>>>        The fuel in the main tanks goes downhill to the fuel selector.
>>>        Fuel then goes downhill again through the Facet pump into the
>>>        top of the sump tank. Fuel then comes out of the bottom of the
>>>        sump tank through the gascolator into the EFI pump(s), then to
>>>        the fuel rail with fuel pressure regulator attached, then that
>>>        returned fuel goes back into the top of the sump tank.  That
>>>        is the complete system. Take care. Paul Conner
>>>
>>>             
>>>             
>>>
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>>>      
>>>
>>>>>Homepage:  http://www.flyrotary.com/
>>>>>Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>>>>     
>>>>>
>>>>>          
>>>>>
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>>> Homepage:  http://www.flyrotary.com/
>>> Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>>      
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