Last evening was calm here. I noticed that the blades on my Whisper 1000
had assumed a swept back shape due to bending of the mounting plate.
This has been an ongoing issue with this machine. On an earlier version
of this model I had three different plates as the design evolved. This
is the second one, I believe, on this one. As instructed, I have
occasionally bent it back when I had the machine down for other repairs.
Now again, at rest, the blade tips appear (from the ground) to be 1.5 to
2 inches behind the normal plane. My question is, beside the obvious
concern of them flexing much further when in a strond wind and hitting
the tower, what impact does this deformation have on the performance of
a turbine. I'm reluctant to keep bending it back and forth as this seems
likely to weaken the plate even further. I'm not positive but it also
seems that the shaking and vibration associated with yawing or furling
increases as the blades assume this swept back shape.

Michael LeBeau