Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 515
entering the blades; A general equation which unites all V'=rw = tangential velocity of the the variables in a centrifugal pump will internal circumference of fan in now be considered. Assuming at present feet per second; that the pump has a spiral case, and that its mean theoretical efficiency be… … Then referring to Fig. 12. equation is found involving R, at, v, and lift, any three of which being known, the (IV) 6 fourth can be determined. This equation sin is of great practical value ; for if, for in- stance, it is required to be known how and the condition that the blades should fast a pump…
Engineering
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-406-158.webp)
