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Thread: Calculating fan power - [REVOLVED]

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  1. Jan 18th, 2004, 06:33 AM #1
    wossname
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    Calculating fan power - [REVOLVED]

    I have mounted a standard PC case fan blade onto a big motor. I currently have it spinning at about 11,000 revs.

    If the outer diameter of the blade is 120mm and the diameter where the blades meet the hub is 60mm this should give me a surface area of...

    (Pi * (60 * 60)) - (Pi * (30 * 30))

    = 8482mm^2

    I reckon the pitch of the blades is about 28 degrees.

    Is there a way to calculate roughly the volume of air that passes through the fan?

    PS Currently the fan easily lifts its own weight!
    Last edited by wossname; Jan 20th, 2004 at 02:22 PM.
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