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ISBN: 0833083325 0833078658 9780833083326 9780833078650 Year: 2013 Publisher: Santa Monica, CA RAND
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Aircraft operations on soft fields are limited due to field rutting. Each subsequent aircraft pass, defined as one takeoff and one landing, increases field rutting until the field reaches a point where further aircraft operations are no longer permissible. The ability of aircraft to operate on soft fields is often expressed as a function of aircraft landing weight and the California Bearing Ratio (CBR) of the field, which measures the ability the soil to resist compressive loads. Because soft fields can support only a limited number of takeoffs and landings, it is important to understand how to maximize the cargo throughput at these soft fields. This document shows that there exists an optimum landing weight that allows for maximum cargo delivery. This optimum landing weight is found to be constant and independent of field CBR. One of the three objectives of this study was to inform important analytic tradeoffs. Understanding the ability of aircraft to operate from soft fields is one of these important trade-offs. This document details the mathematical calculations used to determine the optimum landing weight that allows for maximum cargo delivery.
Airlift, Military --- C-17 (Jet transport) --- Air bases, American --- Military & Naval Science --- Law, Politics & Government --- Military Administration --- Planning --- American air bases --- Globemaster III (Jet transport) --- Air transport, Military --- Military airlift --- Jet planes, Military --- Jet transports --- McDonnell Douglas aircraft --- Aeronautics, Military --- Transportation, Military
Book
ISBN: 0833077015 0833081160 9780833081162 9780833077011 Year: 2013 Publisher: Santa Monica, CA RAND Corporation
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The current strategic airlift fleet will be reaching the end of its service life in the next few decades, which has raised concerns about the cost and possible budget spike that would result from the need to recapitalize that fleet. This monograph presents the results of a cost-effectiveness analysis to determine the best way to recapitalize the USAF intertheater (strategic) airlift fleet. The authors examined a broad range of aircraft alternatives, including existing and emerging technologies, and permutations of USAF plans for the current fleet with a view to meeting projected requirements while minimizing life-cycle costs and smoothing out spending peaks. The expected demand for airlift was modeled against the capabilities of each alternative aircraft to form a set of alternative fleet compositions to meet that demand. The authors then estimated the cost for each of the options to determine those that were the most cost-effective. The most cost-effective option involved a highly advanced conceptual design, which represents significant risk. The next most cost-effective options hedge this risk by starting with commercial derivatives as aircraft retire, followed later by a highly advanced aircraft.
Airlift, Military --- Galaxy (Jet transport) --- C-17 (Jet transport) --- Globemaster III (Jet transport) --- C-5 (Jet transport) --- C-5A (Jet transports) --- Lockheed C-5 (Jet transport) --- Lockheed Galaxy (Jet transport) --- Air transport, Military --- Military airlift --- Military & Naval Science --- Law, Politics & Government --- Military Administration --- Planning --- Costs --- Jet planes, Military --- Jet transports --- McDonnell Douglas aircraft --- Airplanes, Military --- Lockheed aircraft --- Aeronautics, Military --- Transportation, Military --- United States. --- Appropriations and expenditures. --- AF (Air force) --- Air Force (U.S.) --- U.S.A.F. (Air force) --- United States Air Force --- US Air Force --- USAF (Air force) --- AMC --- Planning.
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