Flight Test Exercises - Ex. 11 - Slow Flight

Aim

To determine the candidate's ability to establish the aircraft in slow flight, maintain flight control, prevent a stall and recover promptly and smoothly to normal flight.

Description

At an operationally safe altitude that allows recovery at or above the altitude recommended by the manufacturer or 2,000 feet AGL, whichever is higher, the candidate will be requested to identify when the aeroplane is in the slow flight speed range and maintain flight control and transition to normal flight s peeds when requested by the examiner.

Performance Criteria

Assessment will be based on the candidate's ability to:

  1. complete appropriate safety precautions before entering slow flight;
  2. establish and maintain an airspeed that is 5 knots above the stall speed indicated by the appropriate arc or specified in the POH/AFM;
  3. demonstrate coordinated straight and level flight;
  4. prevent a stall and, on command, recover promptly and smoothly to normal flight; and
  5. maintain an effective lookout.

Note:  One of the objectives of slow flight is to determine if the candidate can sense the performance of the wing at high angles of attack. Flight at 5 knots above the indicated stall speed for the configuration is ideal. The use of power and actual weights less than gross weight lower the actual stall speed enough to allow safe operation if the published indicated stall speed is used as a reference. An increase in airspeed while turning or in turbulence is acceptable as the stall speed increases in these conditions. Avoid prolonged periods in slow flight to prevent possible overheating of some engine components.