14 CFR 27.1509 - Rotor speed.
(a) Maximum power-off (autorotation). The maximum power-off rotor speed must be established so that it does not exceed 95 percent of the lesser of—
(1) The maximum design r.p.m. determined under § 27.309(b); and
(b) Minimum power off. The minimum power-off rotor speed must be established so that it is not less than 105 percent of the greater of—
(2) Not more than a value determined under § 27.33(a)(1) and (b)(1).
Title 14 published on 2014-01-01
no entries appear in the Federal Register after this date.