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<blockquote data-quote="Robair" data-source="post: 171684" data-attributes="member: 3686">Hi Tony,I am in the process of upgrading a simple foam trainer from stock powertrain to a more powerful setup but have run into a specification question for which I need and solution.Using your very helpful method of selecting a Motor, ESC and battery, there are certain parameters required for all the calculations.All up weight carrying a 2.2 3cell battery is 1600grThe motor that I will probably settle on is a 905KVA but I can only find a Max current rating of 18Amp in available specifications.I want to determine Cont. and Max Watts for this motor for which I believe I require Battery Volts and Motor Amps to do the calculation.Question: The 2.2 3Cell battery is rated at 11.1V but as far as I know, this means that “Volts under continuous load” is +-9.91V and “load under Max load for limited time” is 9.69VWhich of these Volt values do I use to calculate Motor Continuous Watts (W) = volts x amps?Ultimately, I also want to calculate the theoretical Watt/Pound Ratio.Thanks in advanceRob Davidowitz</blockquote>

[QUOTE="Robair, post: 171684, member: 3686"] Hi Tony, I am in the process of upgrading a simple foam trainer from stock powertrain to a more powerful setup but have run into a specification question for which I need and solution. Using your very helpful method of selecting a Motor, ESC and battery, there are certain parameters required for all the calculations. All up weight carrying a 2.2 3cell battery is 1600gr The motor that I will probably settle on is a 905KVA but I can only find a Max current rating of 18Amp in available specifications. I want to determine Cont. and Max Watts for this motor for which I believe I require Battery Volts and Motor Amps to do the calculation. Question: The 2.2 3Cell battery is rated at 11.1V but as far as I know, this means that “Volts under continuous load” is +-9.91V and “load under Max load for limited time” is 9.69V Which of these Volt values do I use to calculate Motor Continuous Watts (W) = volts x amps? Ultimately, I also want to calculate the theoretical Watt/Pound Ratio. Thanks in advance Rob Davidowitz [/QUOTE]

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