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advancement propeller advance J

The parameter of advancement, (propeller advance), is a dimensionless coefficient enabling comparison between the propellers of different sizes.

parameter advancement propeller advance

The parameter of advancement, (propeller advance), J= fluid velocity upstream / (propeller diameter X propeller rotations per seconde)

 

propeller advance advancement parameter

The propeller advance can also be seen in the similtude parameters of the propeller: Advance parametre gamma.