Since the very first day, people have been fascinated with sky and they were looking for ways to overcome the obstacle of not being able to fly. In 20th century, thank to the incredible advance of technology, that dream has came true. Planes and helicopters shyly appeared before estabilishing themselves as one of the most popular forms of traffic - air traffic. Today, things are looking a little bit different. Technology went even further, and nowadays you can find you favorite types of planes and helicopters in toy-sized shape. Of course, planes are as popular as ever, but in the last few years there was real boom in the gas powered rc helicopter business.
Mind that rc helicopters aren't as benevolent toys as they seem. Sure, they are toys, but that doesn't stop them from being powerful, gas powered machines at the same time. As most of the radio control models, there are different types of rc helicopters, and it all depends on the level of experience you have. Construction is made usually of three materials, although there are some models that are exluded from these three. Most often, your gas powered rc helicopter is made of plastic, glass-reinforced plastic, aluminium or carbon fiber. Also, rotor blades are made of wood, fiberglass or carbon fiber. If you're going to buy new rc helicopter keep in mind that you should pick one day in the week and intend it especially for assembling, because these flying bad boys can take anywhere from 5 to 20 hours of assembling.
If by any chance, regular helicopters aren't something that you can relate to, you can always have more propellers, just choose quadcopters! They generally use two pairs of fixed pitched propellers; two of them are set clockwise, and, contrary to that, two are set counter-clockwise. These four are using independent variation of the speed of each rotor to achieve control. You can change the speed of each rotor, and that's how you gain a desired total thrust. Also, that's how you ca locate for the centre of thrust both laterally and longitudinally, and create a desired total torque, or turning force.
If you're a competitive soul, you can always choose to participate in one of the numerous tournaments. These competitions are official, and they historically followed the rules of Fédération Aéronautique Internationale, including the predetermined routine of maneuvring. On the other side, there are miniature helicopters. They can weigh from just a few grams to one hundred grams, and they are made for plane, plane beginners.
However, keep in mind that your safety should always come first! You have to take all safety precautions needed, and if you're not sure what you can do to make Remote Control helicopters safe, you can always look up the instructions because Academy of Model Aeronautics regularly publishes and updates safety rules for all kinds of aircraft models. So next time you decide to buy gas powered rc helicopter, keep in mind that every single thing can be dangerous, and even though they are labeled "just toys", they are in fact, much more than that. They are the neverending sources of fun.