Browse Topic: Airline fleets
This document describes a method to calculate noise level adjustments at locations behind an airplane (described by an angular offset or directivity) at the start of takeoff roll (SOTR). This method is derived from empirical data from jet aircraft (circa 2004), most of which are configured with wing-mounted engines with high by-pass ratios (Lau, et al., 2012). Methods are also described which apply to modern turboprop aricraft. Calculations of other propagation-related adjustments required for aircraft noise prediction models are described in AIR1845A, ARP5534, ARP866A, and AIR5662.
Consideration for the damaging effects to aircraft from the failure of wheels and tires should be evaluated. This document discusses the types of problems in-service aircraft have experienced and methodology in place to assist the designers when evaluating threats for new aircraft design. The purpose of this document is to provide a history of in-service problems, provide a historical summary of the design improvements made to wheels and tires during the past 40 years, and to offer methodology which has been used to help designers assess the threat to ensure the functionality of systems and equipment located in and around the landing gear and in wheel wells.
This SAE Aerospace Information Report (AIR), is intended to provide a continuum on historical development of aircraft tires.
Fuel availability is a security imperative for aircraft fleets, and tactical dependence on fuel will critically tie global fleets to investments in new drag-reduction technologies that optimize fuel utilization. Roberto Guerrero, Deputy Assistant Secretary of the U.S. Air Force for Operational Energy, recently wrote in Defense News that “when we use our assets more efficiently in peacetime, we build a more energy-aware culture that will better prepare our airmen for tomorrow's fight, if and when it happens.” Adopting sustainability measures today directly affects operational and national security, and it benefits us all to find ways to use less. In its 2019 Sustainability Report and Implementation Plan, the Department of Defense states that its sustainability efforts “focus on mission assurance, operational readiness, and cost-effective business practices.” The report goes on to add that, “The Department strives to maximize the efficient use of mission-critical energy, water, and
This SAE Aerospace Information Report (AIR), is intended to provide a continuum on historical development of aircraft tires.
This document sets forth design and operational recommendations concerning the human factors issues and criteria for airborne terrain separation assurance systems. The visual and aural characteristics are covered for both the alerting components and terrain depiction/situation components. The display system may contain any one or a combination of these components. Although the system functionality assumed for this document exemplifies commercial aircraft implementation, the recommendations do not exclude other fixed wing aircraft types. Because of their unique operations with respect to terrain, rotorcraft will be addressed in a separate document. The assumptions about the system that guided and bounded the recommendations included: the system will have a human centered design based on the "lessons learned" from past systems; the system is not intended to replace the Ground Proximity Warning System (GPWS) function; the system is an on-board system that is not dependent on ground
NASA's Strategic Plan for the Aerospace Technology Enterprise includes ambitious objectives focused on affordable air travel, reduced emissions, and expanded aviation-system capacity. NASA Dryden Flight Research Center, in cooperation with NASA Ames Research Center, the Boeing Company, and the University of California, Los Angeles, has embarked on an autonomous-formation-flight project that promises to make significant strides towards these goals.
This SAE Aerospace Information Report (AIR), is intended to provide a continuum on historical development of aircraft tires.
JUST YESTERDAY, simulation tackled the issues of digital technology in a new generation of aircraft, but here we face another quantum leap as we look beyond the Boeing 757/767 model airplanes. The engineering simulator has evolved, over a period of 25 years, from a relatively modest beginning, to a sophisticated design tool essential to the development of new airplanes and weapons systems. The decisions involved in the management of simulation facilities has also evolved from choosing a modest “take-what-you-can-get” product line, to picking from warehouses full of “goodies,” all of which have their associated payoffs. As a background, the authors will attempt to outline from personal experience and long-term history with engineering simulation, the steps that were taken to reach the present level of sophistication in engineering simulators at Boeing. Engineering flight simulators have assumed an increasingly crucial role in the development and testing of new product lines in the
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