Almost NEVER quoted by manufacturers as blade thickness, pattern and width all have a marked effect, so two props that appear identical but have different blade thicknesses actually have different pitch.

Face pitch is measured 70% of the radius out from the axis of rotation.

Formula

• P (feet) = (101.33 x Va) / Na

Va  = speed in knots through wake at zero thrust

Na = shaft RPM at zero thrust

zero thrust means knots and RPM at which thrust = zero