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Returning to the second question, the pilot now determines not only whether the adequate performance standard was met, but if the workload was also tolerable. If the answer to this question is yes, then the task can be performed with reasonable precision, even though it might take considerable mental and physical compensation on the part of the pilot. If the pilot proceeds to the third question, “Is it satisfactory without improvement?” he now has to decide whether the vehicle is good enough as it is for its intended use or if he thinks it should be changed. The vehicle does not have to be perfect, just good enough. When the pilot proceeds to the right-hand side of the scale, a numerical rating is assigned based on the descriptors of the aircraft characteristics and the demands on the pilot. This process is often a balance between the performance achieved and the compensation required by the pilot in order to achieve that performance. The Cooper-Harper Handling Qualities Scale has been used successfully since 1969, and it is an excellent way to obtain high-quality subjective data from pilots. These data often correlate well with the objective data collected. Adequacy for Selected Task or Aircraft Demands on the Pilot in Selected Required Operation* Characteristics Task or Required Operation*
Yes Deficiencies
Yes No
Yes
*Definition of required operation involves designation of flight phase and subphases with accompanying conditions. Figure D1. Cooper-Harper Handling Qualities Rating Scale. 2. 3. 4. 5. 6. 7. 8. |
