Technological Choices by Lemonnier Pierre

Author:Lemonnier, Pierre. [Lemonnier, Pierre]
Language: eng
Format: epub
ISBN: 9781134523061
Publisher: Taylor & Francis Ltd

APPENDIX

Orsatelli’s formula for finding the power of mill with a horizontal waterwheel is:

To get the practical as opposed to the theoretical this must be divided in half to take into account loss due to friction and other turbulences, so that:

(1)

Chezy’s formula is:

V= C(RS)1/2

(2)

where

R = hydraulic radius (surface/wet perimeter), S = ratio of the fall,

and

C (Manning’s coefficient) =

where n = coefficient of roughness, in this case .013 for unplaned wood.

Then

so that

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