Quadcopter Motor and Propeller Calculation

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The quadcopters and multicopters used today are driven by brushless motors as standard. In most cases these drive the propellers directly. A gear is used in exceptional cases. This configuration of the drive is essential to the success of the quadcopter in many technical areas and those of everyday life. They can be implemented easily and without complicated mechanics. In addition, the brushless motors including controllers have efficiencies of over 70% and higher, which also makes the drives very efficient. It is therefore to be expected that this type of drive will determine the quadcopters to be developed in the future. In this booklet, the basics for calculating the motor and propeller combinations are worked out. In all cases, these are supplemented with practical calculation examples.