Dual-rotor also known as coaxial rotors helicopters consist of a pair of rotor rotating in opposite directions. One rotor is positioned above the other. Coaxial helicopters are favorite because of its clear stability while in flight production it easier to learn. It is also considered to be a favorite indoor action compare to the particular rotor model. Its maneuverability makes it ideal and safe even within one's home.
Underlying Theory: When a helicopter is not in motion its angular momentum is zero. Once the engine is started, it produces a critical number of angular momentum that can cause the body of the helicopter to spin nearby in opposite direction of the rotors. To voice flight stability, coaxial rotors are used by turning each rotor in opposite directions. This allows the fuselage to withhold a zero angular momentum.
RC Helicopter
How does it work?: Coaxial helicopters do not necessarily need a tail rotor. The torque created by the 2 rotors spinning in opposite directions cancels each other. This results to a more carport flight and hovering capabilities. Hovering is one of the main elements in flying a helicopter. When the pilot slows down or speeds up one of the 2 rotors, he can control the hover or direction of the helicopter.
Why go for a dual-rotor helicopter?: Coaxial designs are powerful because of its quality to maximize every ready engine power. A tail rotor plainly throws away some of the power would have been used in lifting and thrusting. It also observed that most dual-rotor R/C helicopters have less noise. Approved R/C helicopters originate a loud "blowing" noise because of the interaction inspiring the flow of air in the middle of main and tail rotors. More and more coaxial helicopters ready in the store these days consume less space production it a more contract model.
Things to consider: The speed of the rotors should be appropriately controlled and maintained. The stability of a coaxial R/C helicopter greatly depends on the 2 rotors' synchronization such that any deviation may effect to damaging effects. Other downside is the possibility of the rotors getting into each other especially during greatest flight maneuvers.
Recently, several R/C helicopters began adopting a simplified coaxial design. This new model consists of a coaxial unbending rotor system with fixed-pitch blades and a swashplate. One thing is clear, dual-rotor R/C helicopters are sure to make a wave in the next integrate of years.
There is a website that has great facts on Rc Helicopters, the website is called: Rc Helicopters World, and can be found at this url:
http://www.rc-helicopters-world.com
By Robert W. Benjamin
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