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Cet ouvrage est un rapport commun de l'Académie des technologies et de l'Académie de l'air et de l'espace. L'aviation commerciale utilise aujourd'hui exclusivement un carburant liquide, le jet fuel, qui est extrait à hauteur d'environ 6 % du pétrole (coupe kérosène). La croissance continue du trafic aérien jointe à des objectifs ambitieux de réduction des émissions de gaz à effet de serre, a conduit le secteur aéronautique à s'intéresser aux biocarburants aéronautiques ou biojet fuels. Le rapport présente l'état de l'art technique et réglementaire mondial avec un éclairage spécifique sur les acquis français. Une « road-map » technologique décrit ce qui pourrait devenir un nouvel axe de développement des biocarburants. Si des pays comme le Brésil et les Etats-Unis pourraient passer au stade préindustriel de la production et de l'utilisation de bio-kérosène dans les prochaines années, l'Europe, consciente du coût économique et environnemental de la biomasse n'a pas encore pris position. La France, qui dispose de tous les atouts pour être un acteur majeur du domaine aurait besoin d'un cadre précis et pérenne afin de garantir la demande dans le temps et ainsi permettre aux industriels d'investir. Le Groupe de travail de l'Académie de l'air et de l'espace et de l'Académie des technologies s'est adjoint des experts des différents centres de recherche et industries concernés : aéronautiques, producteur et distributeur de jet-fuel, producteurs et distributeur de biocarburants, chercheurs spécialistes de la biomasse et de sa transformation en biocarburants. Le Groupe ainsi formé a auditionné de nombreuses personnalités du domaine et livre ainsi le premier rapport français sur ce carburant du futur.
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"What are the benefits of electrified propulsion for large aircraft? What technology advancements are required to realize these benefits? How can the aerospace industry transition from today's technologies to state-of-the-art electrified systems? Learn the answers with this multidisciplinary text, combining expertise from leading researchers in electrified aircraft propulsion. The book includes broad coverage of electrification technologies, spanning power systems and power electronics, materials science, superconductivity and cryogenics, thermal management, battery chemistry, system design, and system optimization; and a clear-cut roadmap identifying remaining gaps between the current state-of-theart and future performance technologies, providing expert guidance on areas for future research and investment. Providing an ideal introduction to cutting-edge advances and outstanding challenges in large electric aircraft design, this is a perfect resource for graduate students, researchers and professional engineers in electrical and aeronautical engineering, policy makers, and management professionals, interested in nextgeneration commercial flight technologies" [Publisher]
Electric airplanes. --- Avions électriques. --- Electric airplanes
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This book is a concise practical treatise for the student or experienced professional aircraft designer. This volume comprises key applied subjects for performance based aircraft design: systems engineering principles; aircraft mass properties estimation; the aerodynamic design of transonic wings; aircraft stability and control; takeoff and landing runway performance. This book may serve as a textbook for an undergraduate aircraft design course or as a reference for the classically trained practicing engineer.
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Small businesses know this better than anyone: Improper, incomplete or inefficient interviewing is a major reason why hiring mistakes are made - and a costly one. That's why the step-by-step system for making hiring decisions presented in The Hiring Blueprint is so useful - you can use it to start building your team quickly and cost-efficiently. This easy-to-use hiring manual is designed for small business owners and managers who have no human resource department, no time and little skill in finding and hiring the best people. The authors are business coaches with years of experience showing s
Exercise. --- Travel. --- Airplanes.
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When Hungary got involved in World War II, the WM-21 Sólyom (Falcon) was the only Hungarian designed and manufactured plane in service with the Hungarian Royal Airforce. It was in widespread service as reconnaissance plane starting from 1938 onwards. In June of 1941, the machines failed to make an impression, mainly because of accidents and technical issues. The planes were diverted to the training role and were still used as such by May 1945. The Sólyom story starts in 1927, with the Fokker C.V, of which the Hungarian Royal Airforce had acquired 76, mostly built under license by Manfred Weiss (WM). WM improved the C.V, which resulted in the WM-16, with 18 built in two variants. This WM-16 paved the way for the WM-21, of which 128 examples were built.
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