Open Source Mower Calculations

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OSHA regulates mower blade tip speed to less than 19000 feet per minute, it looks like most I've seen run 13000-19000 which means we need a gearbox or a pulley system to increase the speed of mower.

Speed - PTO Motor - 800 RPM - 4' diameter - pi*D*800=3.14*4*800=10k fpm. Low but ok.

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