MEM425F09_7.acclClimb

# MEM425F09_7.acclClimb - MEM 425 Aircraft Performance Design...

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MEM 425: Aircraft Performance & Design Accelerated Climb

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Accelerated Rate of Climb F-16 are capable of accelerated rate of climb. Static climb analysis is inappropriate. As an alternative to “force - balance” approach, adopt “energy” approach. . Yousuff MEM425: aircraft 2 1 2 altitude velocity ( potential energy) ( kinetic energy)
Energy Height Yousuff MEM425: aircraft 3 2 potential energy, 1 kinetic energy, 2 PE mgh KE mV : mass : altitude : velocity m h V 2 1 total energy 2 PE KE mgh mV

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Enrgy height curves Consider h.vs.mach# plots, with constant H e contours. Yousuff MEM425: aircraft 4 100 ' e HK 80 ' e 60 ' e 20 ' e () h Kft 100 80 60 20 mach 0.8 2.0 1.5 1.0 E D C B A a/cs A and B have same energy ht. They are capable of moving to C and E , w/o changing their ‘power setting’ (trade in PE for KE & vice versa) D is @ higher energy ht. (in combat, all else equal, D is in better position than A & B) How do you move along an energy contour?
Travel along H e -contour Yousuff MEM425: aircraft 5

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MEM425F09_7.acclClimb - MEM 425 Aircraft Performance Design...

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