OK-- try this:
I did a lot of testing with electric motor and a thrust stand andfound this situation to be very repeatable :
when a given amount of energy (watts ) were absorbed by the motor --the thrust was always -always - almost identical
Irrespective of the prop size/shape number of blades - I even placed two two blade props on the motor shaft-same results
I was surprised but the test was validated over and over .
remember this is a STATIC THRUST demonstration-- NOT a test of prop efficiency.
So If you can disprove this -please demonstrate how.
The reason for the test ?
I was trying to find the "prop"best for a static thrust of 8 ounces at the time .
there was ZERO data I could find which was applicable and the "calculated info" was just plain incorrect.
Prop efficiency in moving flight is a completely different matter - but in the original question -the problem was re hover (static flight).

In actual practice with larger models the results were very hard to qualify. (and I used up to, including, my 160 cc , 40 lb EXTRA
Why?
each different prop put the prop at a different rpm which was at a different point in the power curve of the engine .
the actual torque reaction at stationary hover tho -was the same -IRRESPECTIVE of prop
not surprising as the work (load)was the same .
also no matter how hard the engine appears to be "working"-- the stationary hover will require the same amount of "WORK" if the weight to be hovered is the same.
This is basic physics