"Average Pitch" /
7020/3 / H50 / custom pitch gauge
Modified 7020/3
& H50 measured on pitch
gauge. This dial indicator type Pitch Gauge is very accurate & easy to
use. It shows the Max & Avg. blade pitch.
To determine the actual (AVERAGE
BLADE PITCH), different measurements must be taken along the blades
Traling Edge. With
the pitch gauge, take between 3 >4 measurements;1st about 25% from the
hub, 2nd 50%, 3rd near the tips and at the CUP.
(Example 7020/3): 1st= 5" / 2nd= 5.5" / 3rd= 6" pitch.
The total of the 3 = 16.5" divided by 3 = 5.5" average blade
pitch, this is the actual distance the prop will travel forward during one
360 degree revolution. Of course Slip is not subtracted from
the above measurements. It is important to calculate average pitch
on cupped props.
Paul Govostes 10/22/2002
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