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Unequal fuel tank levels

 
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zsmith3rd(at)earthlink.ne
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PostPosted: Thu Sep 11, 2008 4:22 am    Post subject: Unequal fuel tank levels Reply with quote

do not archive

Gravity-induced air leakage is the problem.

One wing, being slightly lower than the other, upsets the intended equal distribution of fuel.
This then results in massive amounts of air getting into the higher tank.
A two-inch left-to-right tilt is nearly one-half the depth of the 701 tanks; nearly one-half the capacity.

A wise old ag pilot once told me that the prop was just a big fan....it is there to keep the pilot cool.
He went on to say that if the fan stops you can see the pilot sweat.

Those with unequal fuel levels may need to install an auxillary air pump to replenish the tank with less air. This may help to keep the fan running.

Everybody have a nice day, and straighten up and fly right-hand patterns!!

Zed


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n85ae



Joined: 14 Mar 2007
Posts: 403

PostPosted: Thu Sep 11, 2008 5:40 am    Post subject: Re: Unequal fuel tank levels Reply with quote

If you guys REALLY want to understand why the fuel level is different,
then you have to drop the simplistic view.

Go to Google and search on "fluid dynamics hydraulic head", it's not
completely simple but this is the explanation as to why the difference.

There are a great number of factors that are at play, the end result is
pressure differential across the tanks

Regards,
Jeff


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