>
>I attached razor knife blades to a standard swing blade cutter head
>attachment for string trimmers.  I found it worked best at about 1700-2000
>RPM.  Slower, and it would not cut grass.  Faster, and it started to move a
>lot of air and the idling power started to climb.  At 4000 RPM it was
>consuming many times the horsepower (air friction goes up as the square of
>the fan RPM!)

Air drag alone is KV^3.

For a start, I'm planning to make this an add-on to my existing mower.
I won't be letting it run unsupervised.

--
Dave's Engineering Page: http://www.dvanhorn.org

I would have a link to http://www.findu.com/cgi-bin/find.cgi?KC6ETE-9 here
in my signature line, but due to the inability of sysadmins at TELOCITY to
differentiate a signature line from the text of an email, I am forbidden to
have it.

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