2018/4/27 Take-off Run,Take-off Distance and Take-off path in detail Accelerate-Stop Distance 因上声克通大学 国上清大学 Take-off distance max(ASDOEI,TODOEI,1.15TORAEO) Available take-off distance Take-off path TORA:Take-off run available runway length available TO ight path -TODA:Take-off distance available runway length available clearway if available ASDA:A AEO 8aoTe2e二Werbin Song Aircraft characteristics and Airport planning 圈上活大坐 Take-off Distance all engines operating (Ia) 国上活大孝 Aircraft manufactures provide runway chart U -Sea-level,standard day -Balanced field lenoth -Should be adjusted based on TOW,altitude,pressure,surface conditions.etc. FAR Takeoff Field/Runway Length definition max(ASDOEI,TODOEI,1.15TORAEO) TOR(Takeoff Run)sTORA (Takeoff Run Available) TOD(Takeoff Distance)s TODA (Takeoff Distance Available) T=D+M(dV/dt)+uR R=Mg-L D-0.5qSCp ASD(Accelerate-Stop Distance)sASDA(Accelerate-Stop Distance Available) M(dv/dn)-F=T-D-D-T-D-M(Mg-L)Cp=a+bCi (dV]d)=(T/W-)+(p/(2WJS)-a-bGi-iC.)v2g Take-off Distance Take-off Distance all engines operating (Ib) 国上洋大坐 all engines operating (II) 园上海发大坐 Ground roll distance can be computed by integral Transition flight path -d 。 Approximation can be assumed by (5+) T=0.75T “(4+2) -D+D-=0.02+01C 2 5+2 -0.02+0.01c-） is BPR of the turbofan engine sty-Dr.Wenbin Song y-Dr.Wenbin Song 42018/4/27 4 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Take-off Run, Take-off Distance and Accelerate-Stop Distance • Take-off distance = max(ASDOEI, TODOEI, 1.15TORAEO) • Available take-off distance – TORA: Take-off run available = runway length available – TODA: Take-off distance available = runway length available + clearway if available – ASDA: Accelerate-stop distance available = runway length available + stopway if available 19 Clearway, CWY, 净空道 Stopway, SWY, 停止道 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Take-off path in detail BR 35 ft TO distance TO flight path Take-off path VEF Critical engine is made inoperative AEO OEI V2 minimum acceleration height = 400 ft End = the higher of : either - 1500 ft, or - the point where en-route configuration is achieved, with remaining engine(s) at MCT, and minimum climb gradient at green dot speed. © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Aircraft characteristics and Airport planning • Aircraft manufactures provide runway chart – Sea-level, standard day – Balanced field length – Should be adjusted based on TOW, altitude, pressure, surface conditions, etc. • FAR Takeoff Field/Runway Length definition – max(ASDOEI, TODOEI, 1.15TORAEO) 21 TOR(Takeoff Run) ≤ TORA (Takeoff Run Available) TOD(Takeoff Distance) ≤ TODA (Takeoff Distance Available) ASD(Accelerate-Stop Distance) ≤ ASDA (Accelerate-Stop Distance Available) © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Take-off Distance - all engines operating (Ia) 22 T  D  M dV dt R R  Mg  L M dV dt F T D D T D (Mg L)     roll      D D  0.5qSC 2 D L C  a  bC dV dt T W    W S a bCL CLV g 2 2     2    © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Take-off Distance - all engines operating (lb) • Ground roll distance can be computed by integral • Approximation can be assumed by 23               LOF LOF V LOF roll V V g dV W D D g T W F MVdV s dx 0 2 0 0 2 1     5 0.75 4 T Tstatic      L t o roll C W D D       ,max,  0.02 0.01   2 ,max, 5 2 0.75 0.02 0.01 4 t o g static L t o V S T g c W                      𝜆 is BPR of the turbofan engine © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Take-off Distance - all engines operating (II) • Transition flight path 24