(b) An aircraft weighing 1337 kN when fully loaded has a wing area of 226 m2. It is to take off at velocity of 300 km/h. Assume the airport is at 3000m above sea level. The wing has the characteristics of an airfoil shown below (C vs a). What is (a) the necessary angle of attack and induced drag coefficient if the wing span is 30m. The pressure variation in the atmosphere is given as: p = Ps (1 6.5K Ts = km dT Where R is the gas constant for air, a is the lapse rate dz (15+273)K, R=287 J/K/kg, subscript s=sea-level. Ps=101.325KP.. Chord 0.48 0.40 0.32 1.6 0.24 1.2 0.8 0.16 Ce 0.08 0.4 0.4 16 24 32 Angle of attack, a (degrees) Lift coefficient, CL Drag coefficient, C,

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(b) An aircraft weighing 1337 kN when fully loaded has a wing area of 226 m2. It is to
take off at velocity of 300 km/h. Assume the airport is at 3000m above sea level.
The wing has the characteristics of an airfoil shown below (CL vs a). What is (a)
the necessary angle of attack and induced drag coefficient if the wing span is
30m.
The pressure variation in the atmosphere is given as:
a. za.R
p= Ps
dT
6.5K
Ts =
Where R is the gas constant for air, a is the lapse rate ="
(15+273)K, R=287 J/K/kg, subscript s=sea-level. Ps=101.325kPa.
dz
km
Chord
0.48
0.40
0.32
1.6
1.2
0.24
0.8
0.16
0.4
H0.08
0.4
16
24
32
Angle of attack, a (degrees)
Lift coefficient, C
Drag coefficient, C,
Transcribed Image Text:(b) An aircraft weighing 1337 kN when fully loaded has a wing area of 226 m2. It is to take off at velocity of 300 km/h. Assume the airport is at 3000m above sea level. The wing has the characteristics of an airfoil shown below (CL vs a). What is (a) the necessary angle of attack and induced drag coefficient if the wing span is 30m. The pressure variation in the atmosphere is given as: a. za.R p= Ps dT 6.5K Ts = Where R is the gas constant for air, a is the lapse rate =" (15+273)K, R=287 J/K/kg, subscript s=sea-level. Ps=101.325kPa. dz km Chord 0.48 0.40 0.32 1.6 1.2 0.24 0.8 0.16 0.4 H0.08 0.4 16 24 32 Angle of attack, a (degrees) Lift coefficient, C Drag coefficient, C,
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