REFLECTOR:Gravity fed fuel flow

[Scott Derrick]

With the KISS vent system as recommended by the factory, all vent lines 
connected to a common manifold to maintain equal pressure on all tanks, 
there are only two reasons why you would have un-equal fuel flow.

1.) Fuel cap leak.  Easy to fix, just get some fuel valve grease(it 
won't contaminate your fuel nor dissolve and grease up the O-Rings every 
50 to 100 hours.  I do the outer ring every annual, the inner ring 
should only need it every 20 years or so.

2.) Your airplane is miss-rigged and is flying in a permanent skid, thus 
the fuel is being flung to the outside of the skid.  I think this is the 
most common and overlooked reason.  Maybe people just don't want to 
admit there airplane is a bit asymmetric?  A minor left or right  rudder 
shimming will correct this.

There just ain't any other way for it to not drain equally.

I guess there is the very remote possibility that one of your vent or 
fuel lines is almost completely plugged, down to a pin hole size and is 
restricting the flow, but that's pretty easy to check by just blowing on 
the line.
Scott


Dave Black wrote:
> John,
> 
> 
>>The important question is what happens after the first tank is down to
>>1/4?  Does the other tank catch up, or are you "out of fuel" once the
>>first tank is empty?
> 
> 
> Fuel starvation occurs.
> 
> Dave Black
> Shortwing RG
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