![]() While most flight controllers have more or less the same kind of hardware, their software can be very, very different. ![]() The only way to keep the quadcopter in flight is to either speed up or slow down the propellers so that propellers on one side do not produce more thrust than the ones on the other side.įlight controllers have a host of sensors - gyroscopes for stability, accelerometers to measure acceleration, a magnetometer or a compass to measure direction, a barometer for altitude measurement and a GPS incase the auto-pilot feature is to be used. This is what keeps the quadcopter airborne. The onboard flight controller - or the flight controller board as it is also called - continuously reads data from the sensors, does a lot of number crunching using sophisticated algorithms - and then makes minute, split second adjustments to each of the four motors. Without it, you will not be able to keep your quad airborne even for a few seconds. The flight controller is part of the system that makes it possible for you to fly a quadcopter by keeping it stable. ![]() The large propellers in a helicopter also make it more gyroscopically stable. Quadcopters also waste a lot more energy relative to helicopters with the same payload because they use small propellers rotating at a high speed whereas helicopters use large propellers rotating at low speeds. Quads on the other hand use fixed pitch propellers that are directly connected to the motors and so are a lot cheaper to build than similar sized helicopters.īut then quads are also less stable - a tradeoff that cannot be avoided. If one of the propellers were to generate more lift even for a single second, the quad will tilt to one side and will crash to the ground unless you intervene and stabilize it.Įven helicopters are more stable than quadcopters, but then helicopters are more complex - and thus more expensive - because the rotor blades continually have to adjust the pitch while they are spinning. If you touch the controls for just a moment and release, then it will not go back to stable flight all by itself. Suppose your quadcopter is hovering at a certain altitude and is stable in mid air. You could say stability, when it comes to aircraft, is the ability of the aircraft to return to level and straight flight when you - the pilot - release the controls.įixed wing aircraft are designed to be inherently stable - but a quadcopter has no fixed wing. ![]() A quadcopter is inherently a very unstable flying machine. So just how do you choose a good flight controller for your quadcopter or multi-rotor? Before we get to that, maybe we should discuss what a flight controller does and why your quad needs one. Best quadcopter flight controller board: best drone flight controllers and boards reviewed ![]()
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