Arrrrgh…I’m getting messages that my emails were not delivered!
Mail was removing the au from the email address. I believe I fixed it and resent the emails. I’ll also try another Private Message
Stuart - HERE is a link to the U of I propeller data. They have measured data for Cp and Ct under both static and dynamic conditions.
At low R numbers and low RPM you can extrapolate from static data even though J=0