Abstract
A recent transport aircraft accident involving inappropriate rudder inputs by the pilot flying has led to a series of NTSB recommendations regarding certification. In particular certification standards are sought that will ensure safe handling qualities in the yaw axis throughout the flight envelope, including limits for rudder pedal sensitivity. This study has the ultimate goal of establishing such standards. A review of current Code of Federal Regulations Part 25 as regards rudder control is undertaken. An analytical investigation of possible piloting tasks for certification is presented. The tasks reflect the philosophy of FAA Advisory Circular 25-7A – Flight Test Guide for Certification of Transport Category Airplanes. A comparison of the pedal force/feel systems for three transport aircraft and four rotorcraft is presented. Two parameters for assessing the quality of pedal and rudder systems are discussed: a linearity index and the amount of lateral yaw acceleration per unit of pedal force input
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