REFLECTOR:Gravity fed fuel flow

[Scott Derrick]

Yes but that would be in the less than a gallon range I would think.

Not the 5 to 15 gallon differences people are talking about.  Before I 
greased my caps and shimmed my left rudder, i would start out with full 
tanks, after a 4 hour flight I'd have 5 gallons in one tank and 15 in 
the other.

Now they are within a couple gallons.

Scott

Milton Mersky wrote:
> In addition to not being assymetric, it is quite possible that the two 
> tanks are not exactly the same size and different amounts of fuel remain 
> in each after a given period of fuel flow time..
> 
> milt
> 
> Scott Derrick wrote:
> 
>> 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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>>
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> 
> 
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