P5.72 A one-twelfth-scale model of a large commercial aircraft is tested in a wind tunnel at 20°C and 1 atm. The model chord length is 27 cm, and its wing area is 0.63 m?. Test results for the drag of the model are as follows: V, mi/h 50 75 100 125 Drag, N 15 32 53 80 In the spirit of Fig. 5.8, use this data to estimate the drag of the full-scale aircraft when flying at 550 mi/h, for the same angle of attack, at 32,800 ft standard altitude. Neglect Mach number differences between model and prototype.

P5.72 A one-twelfth-scale model of a large commercial aircraft is tested in a wind tunnel at 20°C and 1 atm. The model chord length is 27 cm, and its wing area is 0.63 m?. Test results for the drag of the model are as follows: V, mi/h 50 75 100 125 Drag, N 15 32 53 80 In the spirit of Fig. 5.8, use this data to estimate the drag of the full-scale aircraft when flying at 550 mi/h, for the same angle of attack, at 32,800 ft standard altitude. Neglect Mach number differences between model and prototype.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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P5.72
A one-twelfth-scale model of a large commercial aircraft is tested in a
wind tunnel at 20°C and 1 atm. The model chord length is 27 cm, and its wing area is
0.63 m?. Test results for the drag of the model are as follows:
V, mi/h
50
75
| 100
125
Drag, N
15
| 32
53
80
In the spirit of Fig. 5.8, use this data to estimate the drag of the full-scale aircraft when
flying at 550 mi/h, for the same angle of attack, at 32,800 ft standard altitude. Neglect
Mach number differences between model and prototype.

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