飞机设计导论2(第二章)精品PPT课件

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Introduction
Solution A -- By modifying design or operation of existing aircraft. e.g. Airbus 340 family Payload Range
Seats nm km
But limited by the inherent capabilities of the original design and the cost-effectiveness of modifications.
Introduction to
Aircraft Design
Chapter 2
Why Should We Design a New Aircraft?
Liu Hu ()
School of Aeronautic Science and Engineering
Contents
➢ Introduction ➢ 2.1 Market surveys ➢ 2.2 Operator-derived specifications ➢ 2.3 Airline specification for a 150-seat airliner ➢ 2.4 Specification for a close air support aircraft ➢ 2.5 RFP for an air-to-air fighter* ➢ 2.6 Demonstration with SEACD
All operators need to increase efficiency, cost-effectiveness, environmental compatibility and safety.
Air sntroduction to Aircraft Design
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Introduction to Aircraft Design
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2.1 Market surveys
Sources for getting data and characteristics of competitors
Annual publication, e.g., Janes All the Worlds Aircraft
Source: Airbus Brochure
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Introduction to Aircraft Design
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Introduction
Solutions B -- Consider the initiation of the design of a new aircraft.
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Introduction to Aircraft Design
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2.1 Market surveys
Major aircraft manufacturers employ marketing departments which produce annual reports
Analyze and extrapolate (外推) historical data
Aircraft manufacturers are in the business of making profit out of building aircraft.
Initiation of new design is to retain or enhance design capabilities.
! A certain path to disaster is to produce an aircraft that no one will buy!
Two means of deriving requirement specification
market surveys operators’ specifications
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Introduction to Aircraft Design
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2.1 Market surveys
Examine existing and proposed competitors in the market, analyze their strengths and weaknesses.
＊Revenue passenger miles (RPM): 乘客飞行哩数收费／收益乘客里程
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Introduction to Aircraft Design
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2.1 Market surveys
Predict the world capacity requirements in terms of available seat miles (ASM， 可用座位里程) and number of passenger seats in various aircraft size categories
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Introduction to Aircraft Design
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Introduction
Requirements and aircraft specification must consider the needs of aircraft operators, whether they are airlines or air forces.
*Mattingly, J. D., Heiser, W. H., and Daley, D. H.
Aircraft Engine Design. 1987
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Introduction to Aircraft Design
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Introduction
Background
The world has accepted that flying is an extremely efficient means of quickly transporting people, cargo or equipment, and performing a wide range of other activities.