What Does RC Heli Mean?
Posted by Jordan Kavoosi on November 27, 2013.RC Heli is the abbreviation for radio controlled helicopter. Radio controlled helicopters are flying models of helicopters which are controlled from the ground with a transmitter that sends radio signals to a receiver in the model which manipulates the flight controls of the model. RC helicopters are usually used by hobbyists. They use these toys for frivolous purposes. From time to time, they are used for low altitude, near to the ground mid-air photography, policing, filming and remote observation. They have a weight ranging from hundreds of grams to a few grams. The utmost elevation of operation for RC-helicopters is efficiently restricted to the altitude at which the model is still able to be seen. A good number of eminent radio control systems have capacity to elevate over a mile.
A 4-channel radio which includes elevator, throttle, aileron and rudder is the minimum required for a small fixed pitch helicopter. Advanced radios include adjustable mixing functions due to the usual communication of the variety of control mechanisms. Several radio control schemes are used for RC helicopters. The rhythm code intonation scheme of radio control transmits a digitally encoded number the commanded spot for every servo. Pulse-position modulation scheme of radio control transmits pulses 1 per servo position for the commanded position for each servo as duty cycle. However the lack of a fail-safe mechanism in this scheme makes it more suited to small models. Frequency-hopping spreads the spectrum of radio controlled transmission of radio signals by rapidly switching among many frequency channels between transmitter and receiver. It mitigates the risk of interference on a fixed frequency.
RC helicopters are usually constructed of glass-reinforced plastic, plastic, carbon fiber or aluminum. Wood, carbon fiber or fiberglass are commonly used for making the rotor blades of the RC helicopter. They are categorized into various classes depending on their size and engine power. They are powered with glow fuel, electric batteries, gasoline, and turbine engines. Typical flight time for helicopters fueled with nitro is 7–15 minutes depending on the engine size and tuning. The various helicopter controls are maintained by means of small servo motors, commonly known as servos. The tiny volume and less weight of RC helicopters, as well as their constituents, mean that managed inputs, particularly cyclic could have an extremely quick comeback, as well as the ability to turn-around quickly. The RC helicopters which are powered by nitro typically have two stroke motors. The tail rotor has a gyroscope to prevent any tail movement caused by wind and reaction to torque.
RC helicopters are more susceptible to even slight vibrations during their flight because of moving parts; therefore, the construction of an RC helicopter has to be more precise than other RC aircrafts. The mechanical intricacy along with increasing the precision in managing of the swashplate of the helicopter has been improved by using a cyclic pitch assimilation (CCPM) system combines the control put in by using software running on the transmitter. A highly developed type of RC helicopter soaring is known as 3D. There are lots of 3D competitions around the globe.
Despite some RC helicopters being used for commercial purposes, they are mainly treated as a hobby. Several competitions are organized for the aero-modeling hobbyists to perform a predetermined set of moves. Recently, the US Federal Aviation authority ruled that all RC fliers require certification to fly RC helicopters in the country due to some fatal accidents involving them.