Incomparably Quiet 　　- Tipless blade = Noiseless operation

Getting rid of the cause of noise, "tip-vortex" Getting rid of the cause of noise, "tip-vortex" When considering noise pollution, quiet operation is an element of a small wind turbine that can never be overlooked. Among several different sources of noise emitted by a wind turbine, a sound created at the tip of each rotating blade (tip-vortex) is far bigger than all the other sound, including mechanical and vibrating sound. Once a tip-vortex forms, noise level elevates swiftly by as much as 30dB. Blade of Loopwing is in a loop-shape and therefore has no pointed tip to create a vortex. This means that Loopwing fundamentally removes the very cause of troublesome noise.

Slow and quiet

Tip-vortex forms at a tip speed of 50 meters per second (m/s), regardless of rotor diameter. With its fluid dynamic characteristics, Loopwing Wind Turbine creates high torque at relatively low rotation speeds. It is designed to not exceed a tip speed of 40m/s even in a wind speed of 12m/s with no load on generator, while some propeller product operates at a tip speed as high as 150m/s (540km/h).

Together with the tip-vortex-free mechanism, the low speed rotor achieves unparalleled quietness.

Noiseless even with no load on generator

A test conducted at Mie University in April 2007 shows that a difference in noise level between the wind tunnel ventilator alone and the ventilator + Loopwing Wind Turbine (no-load condition) is virtually the same in wind speeds of 8m/s and 12m/s. Further test was conducted in a wind speed of 14m/s with no load on generator, and unpleasant noise deriving from the turbine was not detected by human ears.

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