The number in the cells represent the calculated load of the prop selected.

Prop Load = Diameter^4 x Pitch /100

20x10 prop would be figured as: 20^4x10 = 1,600,000 /100 or 16,000

"Brison 2.4 @ 7100 RPM"

Now all you need to do is following along the chart fiinding like vaules and your engine should turn at the same RPM, utilizing the same Prop Load.

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Schpankme