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Subject Keyword ADVANCED PROPULSION SYSTEMS ♦ HYDROGEN ♦ AIRCRAFT ♦ DESIGN ♦ FUEL ECONOMY ♦ AERODYNAMICS ♦ AIRFOILS ♦ COMPOSITE MATERIALS ♦ HYDROGEN FUELS ♦ LAMINAR FLOW ♦ TURBOJET ENGINES ♦ ENGINES ♦ FLUID FLOW ♦ FLUID MECHANICS ♦ FUELS ♦ MECHANICS ♦ SYNTHETIC FUELS 330600* -- Advanced Propulsion Systems-- Vehicle Design Factors ♦ Emission ControlAlternative Fuels ♦ HydrogenIndustrial & Commercial Use(-1989)
Abstract In 1970, fuel costs were 15 to 20% of airplane direct operating costs; today, they are 30 to 40%. Every 1% improvement in fleet fuel economy will save 100 million gallons of aircraft fuel per year in domestic commercial aircraft alone. Fuel efficiency is the new dimension in aircraft design. Sources of fuel economy improvements projected for the 1980's are discussed. These include: (1) increased wingspan with supercritical airfoils; (2) active control surfaces; (3) ''mixed-flow'' nacelle designs; and (4) use of advanced, lightweight composite materials. During the 1990's, further achievements in aircraft fuel economy may come from: (1) laminar flow control (reduced skin friction); (2) advanced turboprop aircraft for short and medium haul; (3) liquid-hydrogen-fueled transport aircraft; and (4) all-wing aircraft concepts.
Educational Use Research
Learning Resource Type Article
Publisher Date 1977-11-01
Publisher Place United States
Journal Automot. Eng.
Volume Number 85
Issue Number 11


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