Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/419

aerofoil whose ${\mbox{n}}=$ 12, we find by Table IV. $\epsilon =$ .75. Taking 13/15ths of this, we have $\epsilon =$ .65, which the table shows corresponds to ${\mbox{n}}=$ 7. That is to say (assuming the accuracy of these "plausible values"), for a speed of light of 80 feet a second the corrected values for an aerofoil of aspect ratio ${\mbox{n}}=$ 12 can be read from the various tables by taking the equivalent aspect ratio ${\mbox{n}}=$ 7.

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