ASE 167M - Lecture 6

ASE 167M - Lecture 6 - ASE 167M Lecture 6 Turning Flight...

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ASE 167M Lecture 6 Turning Flight Flight 5 Briefing

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Lecture #8 09/18/11 ASE 167M -Apurva Chunodkar 2 Today’s Topics Questions? Turning flight whereas turning flight is one of the routine flight conditions for the majority of A/C’s, it is a key tactical maneuver for a combat A/C Get turning performance: Turning radius and rate of turn Operating limits Left turning tendencies Flight 6 briefing
Lecture #8 09/18/11 ASE 167M -Apurva Chunodkar 3 Turning Flight - EOM The turning flight can be classified in two broad categories General turning involves a gain or loss of altitude Performance obtained by Energy Methods Steady Turning Flight in a horizontal plane constant altitude Performance obtained by simplification on the EOM Closed form performance equations good design insight

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Lecture #8 09/18/11 ASE 167M -Apurva Chunodkar 4 χ Turning Flight – EOM Turning EOM in steady, constant velocity turn: 2 cos sin 0 cos cos 0 cos sin sin cos sin T D W L W W V T L g R x V h V β γ μ - - = - = + = = = where:  μ  is the bank angle χ  is the turning angle is the turning rate β  is the sideslip angle ϖ χ = &
Lecture #8 09/18/11 ASE 167M -Apurva Chunodkar 5 Turning Flight – EOM Simplifications: Turning Flight in a horizontal plane ( γ = 0) Coordinated turn (no sideslip) Good Turning Performance: Smallest possible turn radius R The fastest possible turn rate ϖ (depending on application) 2 cos 0 sin vertical horizontal T D F L W W V F L ma g r V R R μ χ ϖ = = - = = = = = = &

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Lecture #8 09/18/11 ASE 167M -Apurva Chunodkar 6 Turn Radius - R From the EOM Obtain smallest possible R Fly at the highest possible
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ASE 167M - Lecture 6 - ASE 167M Lecture 6 Turning Flight...

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