I am a 320-watt motor

July 2, 2012

Lacking those newfangled power-metering hubs, I am reduced to boring calculation. 400lbs gross vehicle weight, up at hill that peaks at a 10% grade (maybe more hard to tell), minimum speed 4mph, faster in the not-so-steep parts. That’s 320 watts, my huffing-puffing not-much-fun power output over a period of several minutes. 400 = 220 (me) + 110 (passenger) + 65 (bike, tools) + 5 (backpacks). Plus a few watts for the always-on lights, plus a few watts for rolling resistance.

The waste heat output (we’re not that efficient) is almost a kilowatt. Yes, I was quite warm.

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