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All RC helicopter toys are under stress from the moving parts, that's why now a days they are made of durable materials to withstand crashes, vibrations, heat, hard landings, etc. But they also have to be light enough for the heli to perform. There are many reasons why a hobbyist would want his heli to be strong and maneuverable. One reason is that many pilots want to do stunts but not have there heli break apart by the slightest bump. And as these helis are varied by size the material used for each size changes. As smaller helis are not designed to do stunts the material used is allot less durable but still sturdy enough to withstand most crashes. As bigger helis use more durable material and can withstand harder crashes, however a faster moving heli may take harder crashes resulting in more damage and in the end that all depends on your skill. Some micro or mini RC helicopters are made with Polypropylene foam that is elastic and flexible which makes it safe for indoors. While others are made of different plastics that are usually mixed with Acrylonitrile-Butadiene-Styrene which is a thermo plastic found in many toys and resistant to higher temperatures and handles vibrations well. These are very light materials and are used mainly on smaller helicopter toys. As for the shells polystyrene is only used in micro and mini helis which is a hard plastic with limited flexibility. Another material used is polycarbonate which has temperature resistance, impact resistance and optical properties but does not due well in the cold. As using this material in snow whether conditions is not a good idea as they become fracturable. Larger helis are made of wide variety of materials one most common material is aluminum. Aluminum is strong yet lite and inexpensive. Although it is light it is not lite enough for smaller helis. And as aluminum tends to be durable, time will prove it wrong, stress from the vibrations would weaken and crack the helis structure. And if you crash or take a hard landing the frame could bend or crack and may be overlooked which could cause many other problems down the road. Fiber glass is another material used in these helis it handles vibrations well, has high resistance to heat, and is inexpensive. It is highly durable but it isn't the lightest. Carbon fiber has all the properties of fiber glass, with the exception of weight. Although it's much lighter and highly durable it can cost a little more, but in the long run it's worth it. As for the canopy shells they are mostly made of fiber glass. So whether you want to fly your heli indoors or outdoors considering what type of material your heli should have shouldn't be a problem. As the manufactures pretty much have already solved that problem, all you have to do is choose the right heli. And if your a beginner there are many helicopter toys made of foam just to start off with and for your safety. And if you want to pilot a larger heli be more cautious but nonetheless start of with a aluminum or fiber glass heli as you get more comfortable you may want to upgrade later to carbon fiber. So don't worry much about getting the best one the first time you fly as you most likely will have a few crashes here and there. So get out there practice flying and in no time you will be piloting a more durable RC helicopter.
Ulices Cisneros is a former copier/electronics technician turned hobbiest who has an intrest in toys, games, video games, good food, movies, MMA sports and learning more. http://www.squidoo.com/rc-helicopters-toys-for-beginners
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