Old computer adage: "Garbage in-Garbage out". At the very least you had comparable which in the end gave confidence to the purchase.
One subject that IwillIt may wish to consider is the factors with pitch and diameter changes. I believe the rough computations is: One inch of diameter equals approximately 400 RPM drop or 200 RPM drop per one inch of pitch increase. That based on one inch of diameter increase equals two inches of pitch. (cup blades differ, this is for straight blades computation . Using this one can bring other wheels with different pitch/diameter viewed into perspective of relationship to known pitch and diameter information.
Another forum question perhaps is the actual event that creates WOT. Is WOT arrived with the boat pushing against a fixed object (dock) or is WOT arrived with running at WOT free? There is an actual difference. My belief is running free as under actual conditions. The questions is asked from a tug boat application where the power of the wheel is measured by "Bullard Pull". the wheel providing the most pulling power. Different applications for sure, yet efficiency of the wheel is in play. Bullard Pull is determined by pulling or pushing against a fixed object. (I can be corrected on this for sure.)
If this is determined by a forum moderator to be a separate forum, take what action is required. Thanks.
Al