One can excite electrons with a thousand volts from a cattle prod, but the starter won't spin. Power is measured in watts. Watts is volts times amps. 200 amps at 11 volts while starting gives 2200 watts. So a 12v battery develops enough work effort to spin it well. At 5.5 volts cranking a 6v system to 400 amps, the watts is 2200. Because lower voltages require higher amps, they loose more in motor efficiency and wire resistance losses. 6v batteries have thicker plates, and are subject to the same internal resistance issues. Look at the trend in battery powered hand tools. from the 12 volt tools years ago, we now can find 60 volt battery driven powerhouses. It is delivered energy that makes watts turn starters. Voltage provides that force, through small resistances (way less than an ohm on both 6 and 12v starters) to drive amps making watts. Jim
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Today's Featured Article - Picking Corn - by Rick Nikolich. It was the day before Christmas shutdown at work and I asked our lead engineering expert Scott Andrzejewski what he was going to do over the holidays. He said that he had some corn that he still needed to pick with an antique one-row New Idea corn picker. Scott has a nice farm about an hour north of Lansing in St. Johns, MI. He wanted to get the rest of his corn in by the next day (Christmas Eve). We had about an inch of new snow on the ground and single digit temperatures. So in the bac
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