FAQ OF TREX 450 - written by Travis Hu

1.How long is lithium polymer battery life?
A: lithium polymer battery is generally to charge and discharge times for the unit, a charge and discharge of a cycle, 80-100 cycles or more general but to charge and discharge, strictly control the use of time and the use of balance charging to extend battery life.

2. TREX 450 novice to use CCPM or traditional swashplate?
A: The traditional swashplate, regardless of setting or installation is easier and more intuitive, you can learn a lot of things.

3.CCPM and traditional swashplate each What are the advantages and disadvantages?
A: of CCPM's advantage is the relatively simple structure, light weight, and Direct Push version of the precision can be done to a very high, the disadvantage is that the synchronization of the three servo to high, debugging trouble, high requirements for the remote control, direct push version is easy to fall damaged the steering gear. traditional swashplate CCPM compare just the opposite, the drawback is that the more complex structure, the weight is slightly heavier, low requirements for steering gear PITCH steering gear requirements, general remote support, commissioning.

4. What is CCPM?
A: of CCPM is the abbreviation of (Cylic Collective Pitch Mixing), of CCPM is a cross disk drive of CCPM distributed in the swashplate swashplate design for the control point 120 ° angle, eliminating the mechanical mixing structure, swashplate servo direct drive, plus a remote control computer mixing, before and after the completion of the swash plate. turning around and lifting action. In this way, the pitch of the swashplate (swashplate movements), the same amount by three servo action can be completed the same elevator (cross the plate before and after the flip), like to spend three servo; aileron rudder (swashplate left and right turning), two servo with the action is completed. The advantages of CCPM: pitch rudder control maximum load (because the main rotor to rotate to change the angle of attack), the CCPM pitch by three servo with the completion of the action force is three times that of the conventional swashplate management, elevator also get three times the power, the aileron rudder twice the boost, which directly reduce the burden of the servo, to enhance the control accuracy. The direct drive servo swashplate, simplifies the mechanical structure, easy maintenance, lightweight body. The shortcomings of the CCPM: to achieve the servo mutual mixing, the remote control must be supported (because it is no longer a command, a servo action), should also consider the synchronization of the servo of CCPM in fact, is the outcome of the mechanical and electrical integration mixing, using the computer to simplify the control of the mechanical structure of the swashplate

5. What is the TREX 450 IDLE mode?
A: The so-called IDLE mode aerobatics mode, when the main rotor pitch from -9 to 9 or even 12 degrees change in order to achieve a variety of 3D flight, generally throttle curve is concave on both sides of 100%, in the middle for about 80%.

6. Why do you want to set the throttle curve?
A: The throttle curve is used in conjunction with the pitch curve, usually in order to improve handling and rational use of power and setting, imagine if our helicopter pitch is fixed, say, 5 degrees, low speed when the air resistance of the large propeller is not big, once the speed, air resistance will show exponential growth, which will result in dramatic increase in motor load, the current is too large slow speed upgrade motor gradually reach the speed, we push the throttle, the aircraft immediately took off, we continue to push the throttle, because the pitch is fixed, we can only add some buoyancy, and then stepped on the gas, because no change in air density, so the lift upgrading a few motor efficiency is very low at this time and effort not, but the use of variable pitch, low pitch is negative or 0 degrees, the startup current is small, and gradually increase the throttle, the pitch is gradually increased, motor load, and also increase in the proportion of rotor speed quickly, current growth is relatively slow, hover point, the aircraft took off, continue to fuel door, with increasing pitch, so that the motor power continued to play, take full advantage of the power, the decline set the throttle curve is very necessary, can make full use of power to achieve the reasonable use of the power they can get a good handling, aircraft would not have soared violence drop, let's easier to control if we a moving throttle aircraft soon decline or a sharp climb that how to fly it? super mode is the case, but a little difference, at 0 degrees pitch throttle a little low these, in order to save idling the power consumption, but also in order to avoid the rotor speed is too high resulting in danger

7. how to determine the TREX 450 motor gear and the gear gap?
A: The correct approach is to check the gear 5 blades supporting local, gap teeth, but also to turn a ring to confirm, usually a local will be relatively tight, tight as a benchmark to adjust, adjust it to the big gear so slightly from side to side (about 0.1mm or so) and the motor gear fixed to prevail

8. why I motor power after pushing the throttle does not turn it?
A: In order to protect the safety of users, usually ESC at boot when not in the lowest position of the throttle stick will not start, You should check the position of the throttle push rod is not at the minimum. Another is that just finished loading machine, the throttle channel does not reverse, the power transfer directly into the set, so I do not turn

9.Where do ESC voice came from, why not see the buzzer?
A: ESC's voice is in fact issued by the motor, ESC output an audio signal sound to promote motor oscillation

10. why the instructions in some parts of screws glue?
A: In order to protect the safety of users, the screws in these places generally withstand load and vibration to cause personal injury, in order to avoid screw off, so be sure to follow the instructions carefully glue fixed metal parts with particular attention to this issue.