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  1. charles2317

    Motor Kv & Calculated speeds

    Huh, well check my math here.. Scratch that. I was using the diameter instead of the radius! So.. 149kv * 37V / 60(s/min) * 2 * pi * (0.08/2) = 7.69m/s to 17mph. Note, 80mm kegel wheels. This is a low rpm motor, would it hurt to use a smaller ratio, maybe 1:2 or 1:2.5 rather than 1:3 to...
  2. charles2317

    Motor Kv & Calculated speeds

    Question 1: How well do these calculations hold up for real world e-longboards with a load? I recently ordered the 149kv SK3 from Turnigy and the calculations @ 10s with a gear reduction of 3, give you still decent speeds (13m/s -> 29mph). But how do these numbers work out in the real world? I...
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