Flying machines: practice and design. Their principles, construction and working (1909)
Kennedy, Rankin, d. 1917 · London [etc.] : The Technical Publishing Co., limited · leaf 53
ower of air, requires to suck in its feed. It is not like a screw propeller driving into the feed with a high velocity in an axial direction. Fig. 20 may be taken as an illustration of a common type of air-blower, with rotating planes properly shaped. Thou- sands of this type are in practical use… … or accelerates, 1,000 cubic feet of air per second, with an expenditure of 5 B.H.P. at an acceleration of 35 ft. per second. Here we have 80 Ibs. of air ( W) , accelerated to 35 ft. per second (V), and by the fundamental formula the thrust T is = 3 32 a thrust or lift of 87 Ibs. for 5 B.H.P. = 17-4…
Flying-machines · Aeronautics
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