[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR27.65]

[Page 563]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 27--AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT--Table of Contents
 
                            Subpart B--Flight
 
Sec. 27.65  Climb: 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;
    (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) VY 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 
VNE;
    (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]