2018/3/11 国上清庆大坐 Overview of Lectures 国上清大学 0.Overview 14/15 Performance(a,b) 16.Aircraft certification 2.Overall configuration 17.Aviation economics weight estimation 18.System integration and d weight estimation configuration management Aircraft Design Fuselage design 19.Multidisciplinary design 6/7/8 Aerodynamic design(a,b,c) ootimization (飞行器设计) .hat and ing 20.Military aircraft design-overview 21.Environmental issues 10.Landing gear and Aircraft systems 22.Design skills 11.Power plant Wenbin Song 12.Stability and control School of Aeronautics and Astronautics 13.Loads,materials and structures Shangy o r nd 0171 Soor an0 Aircraft Sizing 圈上活大坐 Definitions of T/W and Wing Loading 国上大峰 Sizing procedure used to determine the major parameters of the 。Definitions aircraft during conceptual study -Thrust-to-Weight Ratio (T/W):Engine Thrust to Aircraft Weight Ratio T/W and wing loading are the two important parameters affecting Or Power-to-Thrust Ratio (Propeler Engines) the aircraft performance Wing Loading:Aircraft Weight to Wing Reference Area Ratio -Methods to determine T/W Methods to determine W/S el,static thrust, Used along with mission weight calculations settings eagaea2-w58 8oa6o0e四k-a88 T/W and Wing Loading are 图上洋大峰 Thrust Loading vs Wing Loading Interconnected Design Space 国上清大学 Two parameters are interconnected This is our objective from W/S and T/W analysis Both affect the performance of the aircraft 1.6 Small wing loading High wing loading ar母in四 [small wing). Short takeoff cistance Small engine Large engine (High T/W) T/w Wing loading can be determined by stall speed during approach for landing T/W is usually determined first 12018/3/11 1 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Wenbin Song School of Aeronautics and Astronautics Shanghai Jiao Tong University swb@sjtu.edu.cn Aircraft Design （飞行器设计） © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Overview of Lectures 0. Overview 1. Introduction 2. Overall configuration 3. Preliminary weight estimation 4. Refined weight estimation 5. Fuselage design 6/7/8 Aerodynamic design(a, b, c) 9. Thrust/Weight ratio and wing loading 10.Landing gear and Aircraft systems 11.Power plant 12.Stability and control 13.Loads, materials and structures 14/15 Performance(a, b) 16.Aircraft certification 17.Aviation economics 18.System integration and configuration management 19.Multidisciplinary design optimization 20.Military aircraft design – overview 21.Environmental issues 22.Design skills © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Aircraft Sizing • Sizing procedure used to determine the major parameters of the aircraft during conceptual study • T/W and wing loading are the two important parameters affecting the aircraft performance – Methods to determine T/W – Methods to determine W/S • Used along with mission weight calculations © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Definitions of T/W and Wing Loading • Definitions – Thrust-to-Weight Ratio (T/W): Engine Thrust to Aircraft Weight Ratio • Or Power-to-Thrust Ratio (Propeller Engines) – Wing Loading: Aircraft Weight to Wing Reference Area Ratio • T/W is typically defined using sea-level, static thrust, standard￾day conditions at design takeoff weight and maximum throttle settings © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 T/W and Wing Loading are Interconnected • Two parameters are interconnected • Both affect the performance of the aircraft • Wing loading can be determined by stall speed during approach for landing • T/W is usually determined first Small wing loading (large wing) Small engine Short takeoff distance High wing loading (small wing) Large engine (High T/W) © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Thrust Loading vs Wing Loading Design Space • This is our objective from W/S and T/W analysis