Accession Number : AD0775838
Title : AH-1G Design and Operational Flight Loads Study
Descriptive Note : Final rept.
Corporate Author : BELL HELICOPTER TEXTRON INC FORT WORTH TX
Personal Author(s) : Glass, Max E ; Kidd, David L ; Norvell, John P
PDF Url : AD0775838
Report Date : Jan 1974
Pagination or Media Count : 100
Abstract : The report compares AH-1G helicopter Southeast Asian mission profiles with the original engineering frequency-of-occurrence spectrum and the Navy AR- 56 spectrum for attack helicopters. Fatigue lives calculated using the Southeast Asian profile are compared with those determined using the original frequency- of-occurrence spectrum. The development cycle of the Bell Helicopter Company Model 540 rotor system is reviewed, and the fatigue design methods used are presented. Maximum one-time occurrences measured in the Southeast Asian operational survey are compared wirh those specified in the AH-1G structural design criteria and those measured in structural demonstration flight tests. Recommendations are made regarding future mission surveys, the structural surveys, the structural design criteria for attack helicopters, and the upgrading of rotor loads prediction capability.
Descriptors : *FLIGHT LOADS, *HELICOPTERS, FATIGUE(MECHANICS), HELICOPTER ROTORS, LIFE TESTS, LOADS(FORCES), MISSION PROFILES, VERTICAL ORIENTATION
Subject Categories : Aerodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE