Text in force at CAR3-14: from CAR3-0, effective 1 Nov 1949. OCR text
Wings, tail, and control surfaces shall be free from flutter, airfoil divergence, and control reversal from lack of rigidity, for all conditions of operation within the limit V-n envelope, and the following detail requirements shall apply:
(a) Adequate wing torsional rigidity shall be demonstrated by tests or other methods found suitable by the Administrator.
(b) The mass balance of surfaces shall be such as to preclude flutter.
(c) The natural frequencies of all main structural components shall be determined by vibration tests or other methods found satisfactory by the Administrator. WINGS