Re: (ET) Mower motor strength requirements

["Dave Reuter" <david reuter iavinc com>]

I was just thinking about what you said regarding speed. If anyone has one
of the older tachometers (talking to the 40+ generation out there now) that
you use to use a inductive pickup on a spark plug wire maybe someone can
find out what is normal speed of a ICE mower.  I threw out my tach unit
many decades ago.

I guess maybe there would be a way to get a reading with a hand held
contact tach or the reflective tape tachs but I don't have any of these to
check my old gas mower with.

Dave Reuter



                                                                           
             "Markus Lorch"                                                
             <mlorch vt edu>                                               
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                                                                   Subject 
             06/04/2004 03:46          (ET) Mower motor strength           
             PM                        requirements                        
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





With all the discussion about electric push mowers I am
curious how strong electic motors that drive one cutting
blade for push mowers need to be.

I know that small ICE mowers have around 3HP but I assume
that the B&D and Ryobi mowers have much smaller motors as
24V*18Ah should yield a max. of about 400 Watthours, prob.
even less as the batteries are probably rated at a much
lower discharge amperage. Thus if these mowers run for 1 hour
or so then I assume the motors are about 300W. Does anybody
know how strong the ET mower motors are (they drive a smaller
blade)

Also I assume the right cutting speed for such a mower is
around 3000 rpm (just guessing from the typical ICE speed).

Any insights?

Markus


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