3 channels allow forwards/backwards. up/down. turn left/right.
The 4th channel uses a servo to enable side to side movement without changing direction!
In many ways, yes. RC Helicopters are designed to mimic real ones, and have many similarities. The shape in general is quite the same, and people are always trying to find new ways to make their RC Helicopter more realistic. Obviously, RC Helicopters are made differently on the inside, but there are still many similarities between RC Helicopters and real helicopters.
The real difference is that the heli radio is like a little box when the car radio is usally called a pistol grip what is not really found on toy cars.
You should take a look at the Cobra 3 Channel Remote Control Gyroshark RC Helicopter and the 3 Channel Apache RC Helicopter. These are great RC helicopters to start with.
It is possible to watch the Indoor RC Helicopters video on youtube as there is a large selection of Indoor RC Helicopter videos on that website. There are also some videos of Indoor RC Helicopters on the metacafe video website.
One can find cheap mini RC helicopters from a range of online stores. One of the best retailers for RC helicopters is HobbyTron which specializes in all things 'remote control'. Other sources of RC helicopters would be Amazon and Tmart.
You believe
Generally yes. Most RC helicopters have different servo frequencies programmed in to avoid this problem. It is recommended to buy mid- and higher-end RC helos that have programmable frequencies, so you can set them yourself. But if you are going to buy a three channel RC helo, your best bet is to buy two different models, or one brand that has interchangable frequency chips.
2 channel RC systems have 2 control units like rudder and altitude. 3 channels control 3 control units like rudder, altitude and speed. If you buy 2 RC systems get them so they transmit on separate radio channels. 1 radio channel for each helicopter. That way they will not interfere.
The difference between an RC and LC is that the frequency - determining device in the RC oscillator is not a tank circuit. LC can operate with A or C biasing, while RC can only operate with A.
Cheap RC helicopters can be found in Amazon and Ebay. Deal Xtreme also offers significantly cheaper helicopters but there are not many options to choose from.
Syma offers good RC helicopters for a under $75. They are very good helicopters for your nephew to start off with.
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