Lu was always asking the question "Where are the missing 18 degrees?" for the R-22, which had a phase lag of 72 degrees.
The BK had feathering hinges but no flap or drag hinges. Without SAS, it could be uncomfortable to fly, with the slightest puff of wind or teensy cyclic movement passed straight into the cabin. Our Chief Pilot was known as Chuck, because most of his crewmen did.