Development of a Flight Demonstration for Civil Certification Icing Flight Test Training

摘要

This paper documents the development of a flight demonstration sortie intended to show flight test students how to evaluate the effects of icing on performance and flying qualities of an aircraft. Using guidelines published by the FAA for flight test of 14 CFR Part 23 aircraft, the National Test Pilot School has developed a profile for a flight test exercise using an SR-22 aircraft with simulated "pre-activation" ice applied to the leading edge of the wing and horizontal tail. The paper details the preparation of the aircraft, the buildup to flight and the end product in terms of degradation in climb performance, stall warning, stall speed and stall characteristics. One unexpected result regarding the use of tufts for flow visualization was found. This was further investigated and is documented as a flight test lesson learned.