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out their own flying problems themselves. This is significant when one considers the advantage to the investigator or scientist of getting this first hand information from full flight testing himself. Tests are also being conducted in full flight for determining the regions of varying pressure along the wings, along the fuselage, and in the region of the landing gear and tail surfaces. 

AILERONS.
  Different adaptations of aileron counter-balancing features have been evolved by different manufacturers to correct for and minimize the amount of fatiguing exertion required of the pilot to maneuver the ailerons throughout the operating ranges for lateral control. In one instance, the DH-34 and DH-29, the aileron de-multiplying control system of leverage and angular range has been so designed that the high side aileron is moved through a greater angular range then the low side aileron. This, in combination with the counter-balanced aileron leading edge, offset from the aileron spar proper, allows for lateral control with much less exertion than would normally be required.
  The latest Handley-Page has the ailerons counter-balance-

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