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SD-8 Performance

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nuckolls.bob(at)aeroelect
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Posted: Tue Dec 28, 2010 8:02 am Post subject: SD-8 Performance

I'd forgotten about this plot we crafted for B&C 6 years

ago . . .



http://www.aeroelectric.com/Reference_Docs/Alternator_Data/SD8-Performance.pdf



This data was gathered on the test bench and then

plotted against engine RPM for the two common drive

pad ratios: Lycoming 1:1.3 and Continental 1:1.5



There are two curves. One that predicts usable output

at minimum battery maintenance voltage of 13.8. The

second curve shows output available if the bus is pulled

down to 12.5 volts . . . not so low as to begin discharging

the battery but also not high enough to push energy back

into the battery.



It was this data gathering exercise that suggested one

could plan to load the SD-8 to as much as 10A under

some circumstances.

   Bob . . .

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