§ 29.1509. Rotor speed.
135 words·~1 min read·
/us/cfr/t14/s§ 29.1509·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(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 § 29.309(b); and
(2)The maximum r.p.m. shown during the type tests.
(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—
(1)The minimum shown during the type tests; and
(2)The minimum determined by design substantiation.
(c)Minimum power-on. The minimum power-on rotor speed must be established so that it is—
(1)Not less than the greater of—
(i)The minimum shown during the type tests; and
(ii)The minimum determined by design substantiation; and
(2)Not more than a value determined under § 29.33 (a)(1) and (c)(1).