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Unformatted text preview: ASE 367K Final Exam Closed Book ~c;.; s.~ 1. (45 ptS) Consider the constantaltitude cruise of the ideal sifbsonicairplane. a. (10) Draw a freebody diagram of an airplane in constantaltitude flight, and show the coordinate systems. angles. and forces. b. (15) Starting from the definitions of velocity. acceleration. and fuel weight flow rate and from Newton' s second law. derive the equations of motion for nonsteady constantaltitude flight. / c. (5) How many mathematicaldegreesof freedomdo the equationsof Part b have? ,d. (15) For the ideal subsonic airplane flying at constant speed. how much fuel is ~ required to fly a given distance? ~ ptS) Consider the quasisteady. constantaltitude turn of an ideal subsonic airplane at constant power setting. The dynamic equations of motion are given by 2KL2 0= T(h.P)tCDoP SwV2 0= LcosJl W f) Z=(gLsinJl)/WV; where X is the heading angle and J.L is the bank angle. AsSUI:lethat the weight is constant during the turn. a. (5) How many degrees.of freedom do these equations have? ~b~12Q1.Erid the velocity which should be flown to turn from one heading angle to anotherin minimumtime. . 3. (30 ptS) Using words, fonnulas. and/or figures. define the following items. ./ a. 6DOF'equationsofmotion v'b. quasisteadyflight ~~s~o~ ve. specifieexcess .power vi. stal1speed. 4. comer speed h. mean~erody:namic chord i.drc1g , , j.statiGstabilitv ~ Anaircraft.isflyingat .cf = 0.3 and M = 0.7 hasthe followingthrustand ..,'. . aerodynamIc charactenstics: I , CD = 0.02 t. 2.0a2~ I (... '0< "'< CL = 0.1 + 6.0a + O.50E C~=0.1 C~= 0.09+ 6.0(Xc,0.5)al.OoE where all angles are in radians.where all angles are in radians....
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This note was uploaded on 09/18/2011 for the course ASE 367K taught by Professor Staff during the Spring '10 term at University of Texas at Austin.
 Spring '10
 Staff

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