Your calculations are incorrect because you are not using the correct formula, even though your reference gives the correct information.
Why don't you have the courage to say where the mistake is? I know, you are afraid you will say a foolish thing.
Unless you prove the propellers of Whitehead increased their thrust at least 2.37 times at 70 mile/hour as compared to the static thrust your accusations are baseless.
The dynamic thrust for the same engine power can increase a bit as the plane gain speed but not 237%.
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Static Thrust of Propellers
The thrust of a propeller is not constant for different flight speeds. Reducing the inflow velocity generally increases the thrust. A reduction of the aircraft speed down to zero tends to increase the thrust even further, but often a rapid loss of thrust can be observed in this regime."
Source:
Static Thrust of Propellers