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The Influence of Engine Technology Advancements on Aircraft Economics
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English
Abstract
A technology advancement in a new powerplant has both favorable and unfavorable effects, that is, increased bypass ratio and compression ratio, coupled with high turbine temperature, improve performance but also increase engine price and maintenance cost. Such technology advancements must be carefully evaluated in terms of environmental, performance, and cost effects to be sure that the benefits outweigh the possible penalties.
The factors that should be evaluated in choosing an engine for airline use are discussed. These factors are evaluated and compared for two engines that might be considered for future 150-200 passenger airplanes: an all-new turbofan and a quiet derivative of an existing first generation turbofan. The results of the performance and cost evaluations of the example engines are reduced to common units so they can be combined, using a technique suggested by American Airlines, Inc.
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Citation
Witherspoon, J. and Gaffin, W., "The Influence of Engine Technology Advancements on Aircraft Economics," SAE Technical Paper 730960, 1973, https://doi.org/10.4271/730960.Also In
References
- McRae G. M. “Refanned Commercial Gas Turbine Engines.” Paper 730346 SAE National Air Transportation Meeting Miami April 1973
- Epstein Norman Gordon Bruce J. “Profitable Transport Engines for the Environment of the Eighties.” Paper 730347 SAE National Air Transportation Meeting Miami April 1973
- O'Lone Richard “Boeing Couples Stretched 707 to Retrofit of ‘Quiet’ Nacelle.” Aviation Week and Space Technology 99 July 1973 20 21
- Sallee G. P. “Aircraft Economics and Its Effects On Propulsion System Design.” Paper 73-808 AIAA 5th Aircraft Design, Flight Test and Operations Meeting St. Louis August 1973
- “Economic Effects of Propulsion System Technology on Existing and Future Transport Aircraft.” NASA-Lewis/American Airlines Study