For single-engine helicopters and multiengine helicopters that do not meet the Category A engine isolation requirements of Part 29 of this chapter, the minimum rate of descent airspeed and the best angle-of-glide airspeed must be determined in autorotation at—
(b)
Rotor speed(s) selected by the applicant.
Code of Federal Regulations
[Amdt. 27-21, 49 FR 44433, Nov. 6, 1984]