Do not waste your money on blades made of PVC, ABS or plastic. With the
first strong winds, those blades will suffer irreversible stress
failure. We use ultra-smooth dies to shape these blades, minimizing
surface defects. All our blades are field-tested and undergo hundreds
of hours of prototyping to ensure that they can withstand winds of at
least 70 mph!
For generators with very large permanent magnet motors or 500-1000
Watt PMA's, our three aircraft-grade aluminum WindGrabber blades are
designed to create high torque and power! When mounted, the swept area
(diameter) of these blades is a whopping 80 inches (203 cm)! These
blades are designed to put out amps on larger motor/generator units.
This rotor can create some serious power (AKA horsepower)!
Because a larger rotor inherently spins slower, this blade set should
not be used on units that have a "cut in" voltage higher than 250 rpm.
Under no load, the Wind Grabber will hit 200 rpm in about 6 mph wind.
Additionally, it will begin spinning in approximately 2.5 mph wind.