WHAT IS A ?
A new technology that has become a dominant design in the construction of toy-sized , a is a multirotor helicopter which gave it the name “ helicopter”. It is a helicopter using sets of electric motors positioned at rectangular, hexagonal or octagonal positions to lift and propel the . The electric motors serve as the main source for the and are being powered by rechargeable LiPO4 or Nickel Batteries.
The helicopter or has a unique design when compared to the conventional helicopter which has only one moving blade at the top and small blade at the tail side in some .
The quadcopters had been classified under the category as the “rotorcraft” due to their lift action which is made possible through the sets of rotors positioned upward at either side of the .
FEATURES OF QUADCOPTERS
Quadcopters at their basic design use four arms equipped with exact sets of rotors which is where the name “Quad” meaning “Four” came from. However, advancement has revealed similar design with six and eight rotors which were classified as quadcopters.
In the basic design, the quadcopter is a flying vehicle or with four arms extensions having the uniform electric motor fixed at each arm with the propeller of the same size attached to each of the motors.
In the controlling section, quadcopters usually have a four-channel controller that sends commands to the to affect its throttle, , pitch, and roll. The controller enables the operator to control any drift in the position of the while taking a flight. The wireless connection frequency of 2.4 GHz had been the most common frequency used in .
The drone’s propellers are of two sets, one set rotates in the clockwise direction while the other set rotates in the anti-clockwise direction.
The main body of the can be located at the center which usually has a camera attached to it and the same unit bears the used in powering the electric motors.
Quadcopter uses rotors that are able to vary the pitch of their blades dynamically as they move around the rotor hub. In the designing of quadcopters, the motor capacity and RPM is paramount for the success of the design, other factors include; the motor spacing calculations, total weight of the quadcopter in regard to the rotors’ propelling thrust needed for the lifting and control, and accuracy of the motors power rating and uniform RPMs of each motor, etc. when these factors are in their proper places the quadcopter can fly and function successfully after production.
HOW THEY OPERATE ()
The makes its successful flight through the actions of the rotors, two sets of rotors are in it, and one set is rotors at their diagonal positional and the same with the other set. Two of the rotors in a set turn clockwise, while the other two in the other set turn anti-clockwise. Being an aerodynamically unstable vehicle, the speed of each set of rotor creates the change in direction of the either left or right, backward or forward, while the lift action works when the whole rotors are in uniform speed to propel the body upward.
While in operation, the controller sends information to the motors through the wireless electronic speed control system and the information that can be sent to the motors are the thrust, revolution per minute(RPM), and direction of flight signal, etc. combining IMU, Gyro and GPS data for the signal and the control.
A defect in any of the motor will alter the flight directions and smooth hovering in certain directions or show obvious difficulty while sending a signal for the flight control.
During the flight, each rotor will produce both a thrust and torque about its center of rotation and create a drag which will be opposite to the direction of flight. So if all the rotors are spinning at the same angular speed having the rotor 1 & 4 spinning at clockwise direction and the rotor 2 & 3 spinning in the anti-clockwise direction, the total aerodynamic torque will be balanced which will make the angular acceleration of the about the axis to be Zero, making the vehicle to be in a stable state.
The principle explained above makes the to operate without a tail rotor as can be found in conventional since the tail rotor’s function is to balance the aerodynamic torque in the .
SAFETY FEATURES OF
The design and working technics of quadcopters are quite different from those of and . The presence of multirotor at a various position outside the main body of the provides a level of security to the device.
While the will require the wings for lifting, control, and landing, requires only the rotors for the mentioned actions. Though helicopter and are of the same category of rotor thrust , helicopter offers higher risk than the because of the absence of inbuilt , lack of rotor support in the case of failure.
Evidence has shown that any serious malfunctioning in one of the motors may not cause the to clash rather, there will the drastic reduction of power for lifting and hovering flights while the may become unable to fly to certain directions. While in a severe condition the may smoothly reveal the defect by not responding properly to the wireless control.
The created at the body is enough to be used in improving the safety such as installing a in the case of big-sized passenger like the model.
The persistent problems of vertical flight were addressed through the quadcopters’ design thereby providing more stable and windstorm resistant flight which may not be found in conventional and . The directional change, vertical flight and terrain maneuver can be seen in quadcopters.
DIFFERENCE BETWEEEN AND
The major difference between the two is that the helicopter is a rotor propelled while the uses the combination of rotors and wings for propelling. The helicopter uses more power for its flight than the and moves slower than the but it has the advantage of complete flight control and ability to land and take-off at any solid ground surface.
The helicopter is designed to rely wholly on the rotors for all of its actions during flight which includes taking-off from the ground, thereby making helicopter to have a larger than an of the same size. It has greater control against windstorm than an and lifts a heavier load than an of similar size. However, the can have greater speed during flight but its is usually in a forward direction while the helicopter can hover in a place while in the air and move into remote places in a controlled manner.
Based on the above differences, helicopters are good for surveillance and military actions while the airplanes are good mainly for air , at the advanced level the two giant air vehicles are used for the two purposes mentioned above respectively.
HOW FUTURE MAY LOOK
The new look of the helicopter model called the which had been used to make different sizes of and used to build the successfully produced passenger driverless flying vehicle called made by a Chinese firm, has brought a new idea towards the design of the future . Quadcopter’s design perfection which has led to the present day in will definitely silent the initial design for which use only one or two blades.
The following ; The Bell Boeing Quad Tiltrotor, the AeroQuad and Arducopter, Parrot Ar , and Nixie , etc. found in the model may soon become the model of new commercial passenger as the had already shown, it is believed that soon helicopter manufacturing firms may start adopting the design for the same purpose were meant for in other to stay-up-to the upcoming marketing competition which may cause the initial to have low demand.
Originally posted 2018-08-06 17:25:17.
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