This is a short video to show the results of my lessons building quad-copters to help answer those subscribers who have asked questions around this topic.
In this video I explain how to size the motor and what ratios to use to get the right power in your model from my experience. Basically - you need to have a little over twice the weight of the model as thrust from the motors to have the model comfortably hover at the 50% point.
A useful tool can be found at /
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Happy Flying!