Very interesting! The only part I question is:

"Peter Stickney" wrote...

Increasing the diameter of the propeller works well
aerodynamically at most Advance Ratios, but the tip speeds are high.
since most of the thrust of a propeller is generated at the tips, it
also puts huge loads on the propeller blade & hub.

How can "most of the thrust" be generated at the tips -- given the
combination of shorter chord, lower AOA, and [vortex] airflow around the
tips -- compared with the midspan of the blade?