gree with the full-sized coefficient; but that proves nothing. Different motions of the air may produce the same coefficient of drag. In consequence of the scale effect, it never is certain that one airship form is better than another^ if the corresponding model gives a smaller drag at a Heynolds… … Time ki minutes —^ /4 J4 /2 J2 20 % JO^ as 25 \.0d 30^ 30^ 40 S. 40 K 50^ 50^ .04 SO^ 80 ao iOO J}2 too J02 2D0 200 00 CO 2 3 Time in minufes ■ Ttme m minutes ■
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