Talk:Quietrevolution wind turbine
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[Untitled] edit
I started to add and update articles about the VAWT side because mainly only the Savonius wind turbine and the Darrieus wind turbine including the giromill and the cycloturbine, where covered, there it stopped, but time goes on including new inventions.
this section on Darrieus wind turbine explains why:
Helical blades edit
The blades of a Darrieus turbine can be canted into a helix, e.g. three blades and a helical twist of 60 degrees, similar to Gorlov's water turbines. Since the wind pulls each blade around on both the windward and leeward sides of the turbine, this feature spreads the torque evenly over the entire revolution, thus preventing destructive pulsations. The skewed leading edges reduce resistance to rotation; by providing a second turbine above the first, with oppositely directed helices, the axial wind-forces cancel, thereby minimizing wear on the shaft bearings. Another advantage is that the blades generate torque well from upward-slanting airflow, such as occurs above roofs and cliffs. This design is used by the Turby and Quiet Revolution brand of wind turbine.
Since Gorlov made his Helical twist to the blades the engineering world woke up and started to make VAWT's with helical blades. So that is why i made an article about the Turby and the Quietrevolution.
The better efficiency of this type is maybe not because Betz [1] didn't know about helical blades, but because these types of VAWT's are set on very turbulent and high rooftops, exactly the place where they have there main advantage compared to HAWT. Cheers. Mion 04:09, 24 May 2007 (UTC)
Removing tag edit
Significance of the subject is now explained in the first paragraph. -- Johnfos 08:13, 24 May 2007 (UTC)
2019? Still not turning? edit
Re [2]
Yet I don't know of a single QR5 that's still turning. What's happening for those who bought them, then had them fail? Andy Dingley (talk) 10:58, 26 June 2019 (UTC)