Radio Controlled Mosquito

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Nitro-powered Thunder Tiger Raptor 60

Electric powered by Venom Air Corps Ocean Rescue

Electric-powered Align T-Rex 450SE

The Heli-Max Axe CX Micro Helicopter is an example of a model of micro-enterprises coax. Note the size comparison with the cell phone right.
Radio Controlled helicopters (also RC helicopters) are model aircraft which are distinct from RC airplanes because of differences in construction, aerodynamics and flight training. Several basic models of RC helicopters exist, some more maneuverable than others (such as helicopters with collective pitch). More manageable models are often more difficult to fly, but benefit from greater aerobatic capabilities.
Flight controls allow pilots to control the collective and gas (usually linked together), the cyclic controls (pitch and roll), and the tail rotor (yaw). Controlling these in unison enables the helicopter to perform most of the maneuvers of an airplane can do, and that many aircraft can not, such as hovering and backwards flight; this way They are quite similar in the operation of helicopters size.
The various controls of the helicopter are affected by servo-motors of small size. A piezoelectric gyroscope is typically used on the tail rotor (yaw) control to fight against the movement of tail wind and torque induced reaction. This gyro "does not apply a mechanical force, but rather, electronically adjusts the control signal for the tail rotor servo.
The engines used are typically methanol, two two-stroke engines, but the turbine engine jet fuel and electric brushless increasingly combined with a high performance battery lithium polymer are used.
Types of Helicopters R / C
Power sources include:
Nitro (nitromethane-methanol combustion internal)
Electric
Gas turbine
Gasoline / petrol
mechanical arrangements include:
JPAC in all sources of energy
No fixed electrical
Coaxial electrical
Nitro helicopters are currently more frequent than electric helicopters. Practical electric helicopters are a relatively recent phenomenon and develop rapidly and become more frequent. helicopter gas turbines are also becoming more popular, although the high cost puts them beyond the reach of most people.
Nitro
Nitro helicopters come in different sizes: 15, 30, 50, 60 and 90 size. These figures come from the size of nitro eng.