The wing chord length of a certain aircraft is 

and it is flying at a speed of 

in the atmosphere with air pressure 

and temperature 

It is planned to be used in a wind tunnel for model tests. To determine the airfoil resistance, use the length scale 

(a) If an open wind tunnel is used, it is known that the air pressure in the test section is 

and the temperature 

What is the wind speed in the test section? What is the problem with such a test?

(b) If pressure is used In the wind tunnel, the air pressure in the test section is 

the temperature is 

what should the wind speed in the test section be equal to?

Transcribed Image Text:

b = 150 mm,