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Old 01-06-2019, 02:41 AM
  #3  
pmullen503
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Join Date: Mar 2011
Posts: 1,013
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With my Frsky Taranis and an SP-40A sensor on board I get real time voltage and amps. I can log the telemetry in the transmitter for later playback. Under $20, only 17g and you can move it from plane to plane.

The calculator you describe is eCalc. You can try out the full version for a month for $1, it's like $6 year. It's good. I punched in the numbers for a couple existing planes and the predicted performance was pretty close so I've had a yearly subscription for the past few years. They've added a "Setup Finder" where you punch in aircraft, battery, max prop size and it will spit out combinations that will fulfill the desired performance you entered.
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