To understand a Multirotor

Frame is the core of a multirotor, almost all the accessories connected to it directly. We can put the whole model aircraft into two parts: a "heart" - flight control and the use of motor control "legs" - machine blade, and above all these parts are to be integrated in the frame, in order to avoid damage by hitting them, and a rack and control center of gravity of the whole plane.

So what the material usually use to build a frame?

Frame can be made up of many different materials, such as wood, plastic, metal (aluminum), glass fiber, carbon fiber, and other materials. All the parts will be fixed with screws or cable tie on the rack, and occasionally see a flexible foam padding on the rack with plastic or similar in order to reduce the impact of external factors on the frame buffer.

How to define a multirotor?

There are two mainly aspects, the definition of the element is the number of the motor, it defines the number of rotor how much N; 2 it is rack wing (axis) M, the number of that defines the aircraft is M shaft aircraft. We usually of a spacecraft called M axis N propeller aircraft.

Tricopter（3-motor)

Tricopter generally has two axis in the plane forward, a shaft in the negative. So the body should looks like T or Y type. Negative motor adjust plane through the rotation of the fixed on a course , tricopter is better control, usually also rise faster, but not dramatically. Of course, if the motor stops operation, so the plane will crash, but this kind of model is relatively agile.

Quadcopter（4-motor）

Quadcopter weight more than a tricopter, were also more likely to form, because the quadcopter does not need to separate to control the parameters of single motor. They are more stable, and the flying time is longer, because you can carry a bigger Lipo battery 5000mah. quadcopter by reducing the speed of the two motor to implement the roll, and the other two motor can control the whole of the aircraft.

QuadcopterX(QuadX) or quadcopter+ (Quad +) has different wingspan, makes the plane looks like an X or a +.

Hexcopter and Octocopter(6-moter and 8-moter)

The basic design of hexcopter and octocopter are same. Rotor arranged around a central point into a round shape. There are some model install the rotor at the top. Y type hexcopter looks like a tricopter, but no one in which the parameters of the rotor independent control. On the contrary, yaw is similar to the four rotor aircraft, by changing the speed of the motor. Compared with the independent design yaw rotor, such design feeling not sensitive compared with independent yaw.

More rotor enables the vehicle to load better and more stable. Under the control of the rotor more aircraft in flight controllers, when one or more of the motor power, still can keep the ability to fly without crashing. But of course the total weight of aircraft and its complexity of building and is proportional to the price, and the number of rotor also need a lot of power supply,also need more 5000mah Lipo-batteries to carry.

As a beginner, quadcopter seems to be one of the best introduction to the model. They are easy to set up, and the flight is very stable. But when you start, it is better to ensure that the following two points: as simple as possible, the lighter weight, the better.

The best thing is not to start from a finished product craft. Firstly because when you crashed some expensive equipment, you have to wait and spent a lot of money go to the factory repair. Secondly, finished aircraft heavier commonly, lightness of equipment is easier to control when flying in the air. Thirdly, when flight control automatically upgrade and programmed by manufacturer, after it has already prepared everything for you, and you will never feel yourself the fun of how rotor aircraft flight control. The order we need to study is to grasp the principle and properties of aircraft first, and then to the next step of assembly and manipulation.