Flight performance - Horizontal flight
9 important questions on Flight performance - Horizontal flight
What is steady flight?
What is horizontal flight?
What is symmetric flight?
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What are the equations of motion again and how can we change it if we look at steady horizontal symmetric flight?
γ =0 so sin (γ) = 0 cos(γ)=1
dγ/dt = 0 cause γ is constant
αt = 0 so con(αt) = 1 sin(αt)=0
so we get:
F||v : T = D
F_|v : L=W
How do you calculate minimum airspeed?
T = D
L = W
W = 1/2 * Cl * ρ * V^2 *S
V = sqrt( W/S * 2/ρ * 1/Clmax)
What is specific range and how do you calculate it?
--> Optimize this
How can you calculate the fuel flow?
Cp is constant
η is constant
How can the range be maximized?
V/F = ηi / Cp D ~ 1/D
--> Maximize Range
(V/F)max = (1/D)max
so Dmin
How can the pilot know how to fly at optimum for flight range?
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