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124   U.S. CIVIL AERONAUTICS AUTHORITY

Perfection is not to be required in any of these elementary eights. Only a clear understanding of the principles and a fair degree of proficiency in their execution is necessary. They merely serve as an introduction for pylon eights in which perfection will be attained 

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FIGURE 12--Four bank eight.

in the solution of all the problems demonstrated in the elementary types as well as in the additional problems present in the pylon eight itself.

EIGHTS AROUND PYLONS

Eights around pylons are really, in essence, an elementary maneuver. However, because they require that the points about which the turns are made be in the center, they demand a better background of experience, less attention to the handling of the controls and more