For those interested in vortex phenomena, there is an excellent video =
entitled 'Secrets of the Tornado', available from The Tornado Project =
As a tornado is a vortex of nature, examination of real tornado footage =
taken from various parts of the country illustrate some of the =
principle's involved. Approximately half of the video pertains to camera =
footage, with the remainder on instructions as to how to create a vortex =
chamber. The instructor gives plans for several different sizes and =
types of chambers, with all of them able to be constructed in a typical =
workshop. Also a few pictures on an outdoor unit.
Most informative and entertaining.
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