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MIL POWER TAKEOFF (12Klb a/c, no wind) {(1) calculate ground roll for TO {(2) calculate refusal speed from adjusted TOF {(3) find ground roll to Vref {(4) add ~1000' for 3 sec reaction time to put good engine to MAX (5) accel thrust - 2 E (MIL) ~ 2 x 2050 = 4100 1 E (MAX) ~ 2900 ratio 1E(MAX)/2E(MIL) ≈ .7 =>[[strikethrough]] dist from Vref to VTO is ↑ by 10/7 IF SETO ≃ 156, use this: dref + 1000 + (dTO - dref) x 10/7 [[/strikethrough]] (6) if ∆Vse > 0, use SE thrust chart to calculate ∆roll from Vref to VSETO mil power to "reasonable" if dSETO < runway length EFD (SL, 9000') @ 30°C (MIL TOF = 4.5, [[circled]]MAX TOF (∆VSE=4)=3.0)[[/circled]][[arrow to TOF]] [[left margin]]always reasonable on 17-35[[/left margin]] dTO=4800' Vref=145 dref=4100' [[circled]]∆SE=1600[[/circled]] total=(4100)+(1000)+(1600)=6700 [[right margin]] @ 40°C (MIL TOF = 5.0, MAX TOF [∆VSE = 9] = 3.3) dTO = 5400' Vref = 140 dref = 4100' ∆SE = 3200 total = (4100) + (1000) + (3200) = 6700' [[/right margin]] [[left margin]] 12K lb a/c: reasonable for T≤80°F at ELP (RWY 22)[[/left margin]] ELP (4000', 12,000')[[arrow down to MAX TOF]] ∆VSE= 16 @ 20°C (MIL TOF = 5.5, MAX TOF = 3.8) dTO=6100' Vref=150 dref=5500 ∆SE=3500 total=(5500 + 1000+ 3500)=10,000 12.5K lb [[box]]6800' 148 5700 4900 =>11,600 [[/box] [[right margin]] @ 30°C (MIL TOF=6.0, MAX TOF [∆VSE=19]=4.0) dTO=6800' Vref=146 dref=5800 ∆SE=5600 total = 5800 + 1000 + 5600 = 12,400 [[/right margin]]
Transcription Notes:
VRef - Landing reference speed or threshold crossing speed.