Tradeoff Study for Extended Life Helicopter Transmission
Technical rept. 1 Jul 1970-16 Apr 1971
BELL HELICOPTER TEXTRON INC FORT WORTH TX
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The report presents the results of a design tradeoff study conducted to determine the operational cost impact of extending and overhaul life of the drive train components from 1200 hours to 3000 and 6000 hours on future Army helicopters. Pertinent Army and BHC publications were reviewed to determine time between overhaul TBO limiting factors. An analytical review was also made of a mission profile study conducted on monitored AH-1G, UH-1H, and UH-1C helicopters in Viet Nam to determine an appropriate usage rate, power spectrum, and flight length spectrum for this study.
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