Sheerwind-Invelox
SheerWind-Invelox is another sad entry into the ducted turbine hall of shame. Like many others it arrived in a blaze of media hype in the tech press. Unfortunately, SheerWind’s pitch snared several unsuspecting high-profile clients, including the Nature Conservancy and the Michigan National Guard.
SheerWind-Invelox–Is the End Nigh for Another Ducted Turbine?
By
Paul Gipe
Is the end near for SheerWind’s Invelox ducted wind turbine? The problems with SheerWind’s design are coming to a head as its signature clients lose faith.
Sheerwind Invelox: all hype, no substance
By
Mike Barnard
Sheerwind makes radically inappropriate comparisons between their long-disproven approach to wind generation and actually useful wind generation. The numbers show that they are likely about eighteen times worse at generating electricity from moving air than a truly equivalent wind turbine would be, and will require an order of magnitude more material to achieve that.

Fantasy Wind Turbines: If It’s Too Good To Be True . . . or How to Spot Scams, Frauds, and Flakes
By
Paul Gipe
The most important tip to keep in mind is that from Robert Gasch. If there is a new wind turbine, no one should pay the slightest attention to it until they “build it, measure it, and publish” the results. Until then, it’s just hot air–and nothing more.