Re: [Elecraft] L Bladeless Fan Technology

2018-06-04 Thread Edward R Cole
. 73, Ed - KL7UW - From: Howard Hoyt To: elecraft@mailman.qth.net Subject: Re: [Elecraft] L Bladeless Fan Technology Message-ID: Content-Type: text/plain; charset=utf-8; format=flowed The Dyson ad is misleading: it merely has no EXPOSED blades. What it is is

Re: [Elecraft] L Bladeless Fan Technology

2018-06-03 Thread Howard Hoyt
The Dyson ad is misleading: it merely has no EXPOSED blades. What it is is a venturi pressurized by a bladed fan in the base. In this way it is trading high-pressure low-velocity for low-pressure high-velocity which is appropriate for a fan in free-air to cool human bodies.  Fans designed to