![]() ![]() There is also the H configuration, which allows a camera to be placed on the frame well forward to avoid having propellers in the view of the camera. It’s easier to figure out the orientation. Some people fly the plus (+) config because it’s more intuitive, and flies like an airplane. X config is more popular as you can keep the propellers out of the camera’s view (for FPV and aerial filming). It’s widely used for drone racing in the form of “mini quad”. ![]() ![]() Quadcopter is the most popular multirotor configuration, with the simplest mechanical structure. Two motors rotate CW (clockwise), and the other two rotate CCW (counter clockwise) to create opposite force to stay balance. ![]() It also has lower lifting power because of the smaller motor numbers.Ī quadcopter has 4 motors mounted on a symmetric frame, each arm is typically 90 degree apart for the X4 config. However on a Tricopter, it uses a servo to achieve yaw so it loses less thrust when the same situation happens. If the copter is already at full speed (all motors at 100%), it will have to lower the speed to make yaw happens. What that means is when a quadcopter or hexacopter yaws, they do so by slowing down half of the motors and speeding the other half. Tricopter has more yaw authority comparing to a quadcopter. For hobbyists, it’s also harder to build because of the yaw mechanism. Generally speaking, tricopters are less stable than other multirotors with more motors, and it’s not as robust due to the vulnerability of the tail servo and mechanics in crashes. It’s a popular yet relatively cheap configuration because it only requires 3 motors, although you also need an additional servo but they are generally cheaper than brushless motors. Here is a “Y3” tricopter I built before. Here is a “ T3″ Tricopter example. The rear motor can be tilted left and right by a servo to enable the yaw mechanism. Two propellers on the front arms spins the opposite direction to counter each other out. Tricopters can sometimes be found in a “T” shape too. The Tricopter has 3 motors, and typically in a “Y” shape, where the arms are usually 120 degrees apart. It has the least lifting power given the fact that it only has 2 motors.īicopter is not a very popular configuration for hobbyists, and there isn’t much information to be found on the internet. But it’s also the most difficult platform to stabilize in flight. It looks similar to the “Avatar Gunship” (if you have seen the movie Avatar). Here is an example of the bicopter avatar gunship.īicopter could be the cheapest multicopter config to build among all because it only uses two motors and two servos. The BiCopter has two motors that can be moved by servos to desired tilt angles. We will also discuss the benefits of Coaxial Motor-Arrangement. But the downside is decrease in power efficiency, and increase in the cost of purchasing additional hardware and maintenance. More motors also means better redundancy in case of motor failure. For instance the more motors, the more power and lift capacity, which means you could carry more payload. The number of motors and configuration have impact on flight performance, and each has its own advantages. In this post we will discuss the following types of multirotors: They are generally categorized by the number of motors used, for example a three-motored multicopter is a called a tricopter, and the configuration can also be referred to as Y3. More recently Drone Racing is a hot topics, where multicopters are used in racing and free-style competition. Radio controlled multicopters are increasingly popular for aerial photography, and land surveying. Multicopters (as known as multirotors) often use fixed-pitch propellers, so the control of vehicle motion is achieved by varying the relative speed of each motor. Tutorial: I will show you how to build a racing drone from scratch. ![]()
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