Code of Federal Regulations (Last Updated: November 8, 2024) |
Title 14 - Aeronautics and Space |
Chapter I - Federal Aviation Administration, Department of Transportation |
SubChapter C - Aircraft |
Part 27 - Airworthiness Standards: Normal Category Rotorcraft |
Subpart D - Design and Construction |
Rotors |
§ 27.659 - Mass balance.
Latest version.
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§ 27.659 Mass balance.
(a) The rotors and blades must be mass balanced as necessary to -
(1) Prevent excessive vibration; and
(2) Prevent flutter at any speed up to the maximum forward speed.
(b) The structural integrity of the mass balance installation must be substantiated.
[Amdt. 27-2, 33 FR 963, Jan. 26, 1968]