Volume: 1Date: 2024-01-01Original Date: 2024-01-01Title: Section 27.65 - Climb: all engines operating.Context:
Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT. Subpart B - Flight. - Performance.
§ 27.65Climb: all engines operating.(a) For rotorcraft other than helicopters—
(1) The steady rate of climb, at
VY,
must be determined—
(i) With maximum continuous power on each engine;
Code of Federal Regulations /
Title 14 - Aeronautics and Space /
Vol. 1 / 2024-01-01494
(ii) With the landing gear retracted; and(iii) For the weights, altitudes, and temperatures for which certification is requested; and(2) The climb gradient, at the rate of climb determined in accordance with paragraph (a)(1) of this section, must be either—(i) At least 1:10 if the horizontal distance required to take off and climb over a 50-foot obstacle is determined for each weight, altitude, and temperature within the range for which certification is requested; or(ii) At least 1:6 under standard sea level conditions.(b) Each helicopter must meet the following requirements:
(1) V
Y
must be determined—
(i) For standard sea level conditions;(ii) At maximum weight; and(iii) With maximum continuous power on each engine.(2) The steady rate of climb must be determined—
(i) At the climb speed selected by the applicant at or below V
NE
;
(ii) Within the range from sea level up to the maximum altitude for which certification is requested;(iii) For the weights and temperatures that correspond to the altitude range set forth in paragraph (b)(2)(ii) of this section and for which certification is requested; and(iv) With maximum continuous power on each engine.(Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act of 1958 (49 U.S.C. 1354(a), 1421, 1423, 1424, and 1425); and sec. 6(c) of the Dept. of Transportation Act (49 U.S.C. 1655(c)))
[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27-14, 43 FR 2324, Jan. 16, 1978; Amdt. 27-33, 61 FR 21907, May 10, 1996]