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Question: the drag on the airplane cruising at 107 ms in...

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The drag on the airplane cruising at 107 m/s in standard air is to be determined from tests on a scale 1:10 model placed in a pressurized wind tunnel. To minimize compressibility effects, the air speed in the wind tunnel is also to be 107 m/s. Assume the air to be an ideal gas and P=pRT. Determine the required air pressure in the tunnel (assuming the same air temperature for model and prototype) and the drag on the prototype corresponding to a measured force of 4.45 N on the model.

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