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Old 03-02-2005, 12:15 AM
Steve Harris
 
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In article ,
(Franz Heymann) wrote:

Mine has a diameter of approximately 1 ft. How large must I make it
to cope six times as fast as it does now?


Wild guess, 2.449489742783 feet :-) Approximately :-)

Steve Harris - Cheltenham - Real address steve AT netservs DOT com
A useful bit of gardening software at
http://www.netservs.com/garden/