Abstract
A new cargo rotorcraft sized to meet the most demanding of the future combat airlift requirements being postulated by the U. S. Army could be unnecessarily large and expensive. Overall requirements could be satisfied more efficiently with a smaller aircraft by using multilift for infrequent peak demands. This paper describes a methodology for assessing the benefit of multilift and the influence of usage spectrum on required aircraft size and achievable overall productivity. For characteristic distributions of mission payload, radius of action, and ambients, it is shown that aircraft design gross weight could be reduced as much as 40% and overall productivity improved as much as 50% by using multilift for less than 5% of the missions.
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