Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 33
5 40 58.7 4.800 45 66.0 - 6.075 50 73.4 7.500 60 88.0 10.800 70 102.7 14.700 80 117.2 19.200 90 132.0 24.300 100 146.7 30.000 In applying this table, the velocity to be consid-ered is the net velocity of the movements of the air- 32 THE AIR, ship and of the wind. If the ship is moving 20 milesan… … Apparatus for the study of the action of air in motion; a blower at the fartherend of the great tube sends a wind of any desired velocity through it.Planes and propellers of various forms are thus tested. ing stillj so far as objects on the ground are con-cerned. If the ship is sailing 20 miles an…
Aeronautics
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