Helicopter model helicopter is the true scaled down in accordance with certain of its appearance and internal structure are the same and the real helicopter, helicopter model as comparison easier to bring my show, there are also experts in the market now controlled helicopter model. Its appearance is also the same as for a real helicopter .
Here are some basic discussion, only for reference.
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Q: how high and how far a model helicopter can fly ?
A: Because the higher the altitude, the lower the air density, so the helicopter's altitude is generally much lower than fixed-wing aircraft, even so we also have been far greater than the distance visual control and remote distance, so it can be in terms of aircraft flight altitude and flight distance by remote control from the remote device security and visual distance of the decision.
Q:how long the model helicopter flying in the air ?
A: The flight time (empty time) how much is mainly determined by the power system. Such as the use of electric motor power size of the helicopter and carry the battery voltage and capacity, gas helicopter used to carry fuel and engine displacement volume. General of the blank time in 6-15 minutes. First, the energy weight limits, and the second is to avoid manipulation by taking into account the spirit of a long transition to a high concentration of control errors caused by fatigue.
Q: Why is so difficult to fly the helicopter, did not think so good to fly?
A: mainly due to two major reasons: 1. Since the stability of the helicopter and fixed-wing aircraft can not be compared. In addition to the structure of coaxial helicopter propellers, but also does not have any control of a helicopter can do no longer a stable state, floating in the air (usually within 10-20 seconds it will lose balance and fall to the ground), so must always maintain a high degree of centralized control of the spirit! 2 As the beginners in the beginning not in the brain to control the direction of a reflex, so often in the aircraft in a flight attitude, through the transmitter action instructions given to the wrong aircraft, and even a blank brain , and with the operators of the aircraft do not give enough time to correct, resulting in plunging to the ground! As long as you can keep control of the right to practice freely after it! In the initial use of computer simulators can also be accomplished practice.
Q: Why when the helicopter took off to the left or offset elsewhere, rather than straight off?
A: Because the gyroscopic effect and the main rotor downwash effects of air, it is generally the helicopter tilted to the left on take-off is normal! Need slightly to the right to play some aileron control lever (right hand horizontal lever), but can not fine-tuning through ailerons, etc. After observing stable hover around the body of the case and then adjust the lateral aileron trim. If the direction of the shift to the other on the ground can be corrected through the fine-tuning.
Q: What is the hover, hover why practice?
A: hover a helicopter flying a specific way is the helicopter's charm! As the name suggests is almost stationary helicopter in the air at a certain height, so you can complete the regular fixed-wing aircraft impossible task! For friends will just start from the beginning of practice hovering flight, because the helicopter take off, landing, and some other flying start and end of the need to first enter the hover flight. So hover a helicopter flight on the basis of a training course!
Q: What is pitch?
A: The pitch refers to a helicopter rotor or propeller fixed-wing revolution of 360 degrees, up or forward walking distance (theoretically). Like a screw that you screw around, it can turn length. The greater the pitch the greater the distance ahead, On The Contrary is Smaller! However, to measure the size of the actual pitch is more difficult, so the fixed-wing aircraft generally use the same propeller pitch will be marked on the pitch diameter and the size (in inches mostly), so that the engine in and supporting the use of appropriate . Most of the fixed pitch propeller helicopter is designed for a general class of aircraft customization, only marked diameter. Variable pitch helicopter can be very easily by measuring the blade angle of attack (wind angle) to reflect the size of pitch size, and magnitude of changes.
Q: Why should we make the propeller moving / static balance before using?
A: The static equilibrium refers primarily to two blades of the weight to be consistent, mainly referring to two blade balancing the focus to be consistent! For example, we all know the power of the bullet, the bullet actually weighs only 20g or so, its power comes from more than 700m / s high-speed, high-speed gives him great momentum! High-speed rotation of the propeller of the most outer edge of the line speed can reach 60m / s (200km / h) or more! With high kinetic energy can not be ignored. In such a speed, different weight is also a great difference between the kinetic energy produced, causing a huge shock! If the same weight, but different center of gravity, it will also appear in the same radius (concentric circles) of the kinetic energy will be differences. Therefore, we must ensure that the propeller static and dynamic balance!
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