Mart, please.
Part of my job is to determine whether my own analysis is in error.
Is this unique to you?
flat, but cambered
And your dictionary is....?
What the Ray Prouty model will not catch is the local turbulence caused by structure exposed to the airflow.
Have you read your Prouty, page 7?
Most pioneers of this era (including the Wright brothers) did wind tunnel testing on small models, but found that it did not scale up to a large structure.
Are you saying that Cornu did not fly his model?
Are you saying that he was ignorant of scaling?
than the data suggests..
And that data is?
Momentum Theory,
which Leishman used to evaluated Cornu's helicopter, considers a rotor disk that has; ideal twist, constant chord, no cutout, and a consistent induced velocity across the surface of the disk. As you can see from the pictures, Corn's rotors are about as far as one can get from the momentum theory actuator disk.
IMHO, perhaps a better means of evaluating Cornu's rotor would be to consider the lift and drag etc. of four small trike wings at a mean 'forward' velocity.
Leishman may be correct or he might be incorrect, however, opposing technical critiques are better than hasty conjecture.
Dave