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Anatomy of a MultiRotor


A multirotor can be broken down into the following main components:
These are the minimum components needed for flight.

Anatomy Flow



Airframes are the base on which all components are attached and can be

made from virtually any material. They range from injection moulded plastic to carbon fibre,

aluminium and even wood. They can vary in size from 10cm to several meters.

This is the brain of the copter, it houses the control electronics that allow flight control using micro electro mechanical sensors such as accelerometer, gyros and pressure sensors. These sensors give the flight controller the ability to sense its direction, angle and speed/acceleration. 

This is the communication module that links the ground based transmitter (box with sticks) with the copter.  It transmits your stick movements to the copter that allows you to control it.


This is the lithium ion battery that powers all the electronic devices on the copter, including, speed controllers, motors, flight electronics and servos. 
ESC is short for electronics speed controller. Brushless outrunner motors needs a special drive signal to work correctly. ESCs convert power from the battery into a pulse width modulated signal that drives the motors at varying speeds. 
Unlike conventional direct current motors, brushless outrunner motors use a special pulsewidth modulated drive signal to vary their speed. Their operation is very similar to the motors used in computer hard disk drives.  
Self explanatory. They convert the rotational movement of the motors to kinetic thrust that lifts the copter.
This is your control radio that allows you to move the copter in 3 axis. 


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