The following table is from an article in the the American Helicopter Society's publication Vertiflite - Fall 2010 issue.
The speed records are as at August 17, 2010.
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And more.
A third Patent Application
# 20100264258 ~ MAGNETIC DE-ROTATION SYSTEM FOR A SHAFT FAIRING SYSTEM was issued on Oct. 21 2010 covering an another proposal for controlling the rotation of the rotor mast fairing.
Dave