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AUXILLARY FUEL:
Obviously, there are two approaches to obtaining auxiliary fuel
capability. The
first is internally mounted cells, such as in the baggage
compartment or under the rear seat or internally mounted fuel
cells within the wing panel outboard of the main tank. Regardless of where these internally mounted fuel cells
may be located, the net result is the addition of just so much
non-supporting dead weight to the aircraft, diminishing its
performance and “breaking its spirit” in the same manner as an
equivalent amount of dead weight baggage or additional
passengers. In
direct contrast the second method of obtaining auxiliary fuel
facilities is to use eternally mounted wing tip tanks. Here, we find that with a wing tip tank that is designed
to be aerodynamically efficient, the tip load is
self-supporting: that is, carries its own weight and actually
improves the performance
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