Here is a picture of the Optica at Sun & Fun.

Paul Lamar

Richard Sohn wrote:

I started it and I am going to have an opinion! Ha!
The OPTICA guys made the two major mistakes on the fan: first, it is a prop
in a shroud (blade density), second: never put anything in the output of a
fan where the air is supposed to be fast and the obstacles are squared. This
second mistake should be a ground rule.
Look at others for that.
Richard. 

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