Analysis of Air Transportation Systems Fundamentals of Aircraft ...

c) Compute the takeoff runway length requirements for allpermissible flap angle configurations.- f (Deg.) “R” Factor RL TO (mts.) “Round Off” (m)2015570.6074.3084.502,6962,8623,3032,7002,9003,300- fd) The values of runway length were obtained using double linearinterpolation from each table (see AC 150/5325-4 for a samplecomputation). The optimum flap angle for these conditions is =20 0 and the one that should be used by pilots and airport engineers tosize the runway. the resulting runway length is 2,800 m.e) Correct for runway gradient. For a 30 ft. change in elevation isequivalent to 9.146 m. For a 2,700 m. runway this implies a 0.339%effective gradient Increase 10% for every 1% in effective gradientR LTO = ( 2,700) ( 1.0339) = 2,787.40rounding off we get 2,800 m of runway needed for takeoff.Virginia Tech - Air Transportation Systems Laboratory 74