Yeah, I do mean (and changed) that the impedance will be riding up and down as shown in the first diagram. Its lowest point is around 12Hz, so the current will be the greatest and so the applied power. The phase curve shows where the load becomes near purely resistive when it reaches 0 degrees. I think the power used will be close to the inverse of the impedance curve, will it not.
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Looking at your estimate of velocity vs frequency, I would say we're probably only going to get a result for 10hz.
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The velocity sure spikes at that frequency. Do the flares allow a speed over the 5% to not create the chuffing noise?
brucek