Please contact us by Phone or Email if you have any questions after purchase.

The blades of my helicopter suddenly shake/move
  1. It might happen if the battery is nearly finished, so please re-charge the battery.
  2. It might happen if the battery is running out, you can try to get a voltage indicator or similar to check the battery voltage to ensure it is working properly.

Sound "Gi...Gi..." from my helicopter

Some helicopters would have that, it is not a problem.

How long my helicopter's battery can last?

It depends on the mAh of your battery, but default battery can last for 7-9 minutes after recharge.

How long does it take to recharge my battery?

Well, it is hard to answer, it also depends on the mAh of your battery, but usually 45+ minutes. So, it is better for you to get more batteries so you do not need to wait.

I still haven't received a response to my emailed support inquiry?

There are number of reasons that you have not received our response for your inquiry.

  1. Although you have sent us many emails in the past few hours. However, we are not operating 24 hours a day. So please be patient until we come back to work after the night and public holiday (refer to our calendar).
  2. If you have not received response from us after many days, please try to check the Trash or Spam folder of your mail box because sometime our emails could be filtered by your mail server (ISP) as Spam.
  3. If you have difficulties in reaching us through email, please try to fax us your questions (remember to leave your fax number for us to respond).
  4. An email with rude content or unreasonable request might be ignored because we are unhappy to argue with the trouble marker.

Some parts of my helicopter are required to replace, can you send me the parts as replacement for free?

R/C Helicopter is not understandable King Kong so it breaks easily if it hits something or crashing. Please try to keep dropping your mobile phone on the ground to see if that breaks? Would you do that for fun? Of course not because you would expect your mobile would break because of that. So please DO NOT expect the helicopter would be fine no matter how you crash, it is an illogical thought.

Spare parts are consumable, so you need to replace the parts when needed (depends on your skills of course). But Sorry, we do not provide spare parts for free to customers who purchase a helicopter. We would rather to close down our business if we have to, because no one would carry this kind of business. Please be responsible for your fly, the parts would not break without crashing or hitting something by default.

The helicopter does not fly out of the box, is it defected?

R/C helicopter is not a toy like a 2 years old baby plays. You need skills to master it. In general, it takes at least 3-4 weeks to learn hovering for beginners. Some customers could not even fly after breaking their helicopters. So it is normal. Don't think it is easy to be a real pilot. Please read this article to learn about what does RTF (Ready To Fly) mean?

R/C Hobby is not for you If you cannot accept the fact that you break your first helicopter before you can fly.

My battery / battery charger is not working, the battery doesn't hold a charge.

There is a common mistake by many R/C beginners. They would keep playing the helicopter/plane/car until the battery has no more power to run. But in fact, the battery has been damaged because the voltage of a cell has already gone to the dangerous level. So you should use a Low Voltage Buzzer on RC Hobby to alarm you when the voltage of a cell is below the safe level (~3.5V per cell).

Although battery is a consumable item (can only be used for *N* times) but it would usually last longer if it is not being over-discharged/over-charged. Therefore, please take care your battery, because only you can control its lift time and safety.

If your battery has been damaged due to over-discharged/over-charged, you can google for solutions see if that helps. Otherwise you need to buy a new battery.

** Yes. The battery could be damaged even it was just for first use.
** There is no warranty for this kind of damage since it is not because of product defective. Thank you for your understanding.
** Usually, the voltage of a fully charged battery is 4.2V, you can use it for 6-8 minutes, then it will drop down to about 3.7V. So you must charge the battery before use. Otherwise you will damage the battery.
** In experience, when the voltage of a cell is below 3.8V, some helicopter might not lock the tail well anymore. So you must also recharge.

My helicopter is flying unstably because the Gyro cannot hold the tail well while I push the throttle?

This question sometimes even raised by experienced R/C Pilots. They always compare the professional gyro (the one being used on their 450 helicopter) with the one on the low cost (especially micro) R/C helicopter (eg. WL V911, NE 260A, etc.). They like to test the performance of Gyro (Tail Holding) of the micro (low cost) helicopter as they always do with a 450 helicopter (or similar size).

This is meaningless because the Gyros on both helicopter are different in class. The Gyro used on 450 helicopter is even expensive than the micro R/C helicopter. Therefore, low cost micro helicopters (these are toy level helicopters only) are not suitable for you if you have a high expectation like you fly with a 450 class helicopter. Thank you for your understanding.

Why my Quad/Hex Copter is wobbling?

Below are common factors which could cause your Quad / Hex Copter wobbling. The first thing for you to do is to learn and fix it. Sometime it may happen if one ESC or Motor is factory defected but not the case that there is more than one motor or ESC is defective. We build and configure Quad in our warehouse everyday, we have good experience to tell this (avoid to tell us you are the expert because the Quads we build in a week should be more than the Quads any customer builds in his life). The problem is usually from your DIY skill if you have problem on many ESC and Motor.

  • Propeller
    • You must make sure you have balanced the propellers properly because most of the wobble caused by propeller (>90%). This is a common mistake that most people forget to balance the propellers.
    • Please note that propeller will not be balanced by the factory. So you must balance the propeller by yourself.
    • Buy a new pack of CW and CCW propellers because the propellers you are using might be bent a little.
    • If you do not know how to balance a propeller, then try to change different combination of props on the Quad to test.
  • Soldering
    • If the soldering between ESC and Motor is not good, it would cause wobbling too. So you must make sure you have soldered the cable properly, not just 20-50% of the cable wire.
    • This is a very common mistake by junior DIY pilots who think they did  the work right, but they just miss this part often and blame other people or product mistake and faulty. You should try to re-solder all ESC and Motor again properly.
    • If you solder the motor cable directly on the ESC Pad, then you must make sure you have removed all wire left by the ESC cable before you solder the motor cable to the ESC.

      Watch this video (Important):
  • ESC
    • If the ESC has a problem, it would cause wobbling too but it is not likely to happen.
    • If you would like to know whether the problem is from the ESC, try to swap ESCs and Motors around to test.
  • Flight Controller Settings
    • Sometime, a wobble could be fixed by fine tuning the flight controller. But if you are not an expert of the flight controller, you will have no idea what to do.
    • You can try to re-calibrate all ESCs using flight controller instead of using Radio Transmitter. So try to re-calibrate all ESCs again (perhaps using another FC)
  • Motor
    • Multirotor motor has been balanced by the factory using Motion Balancing Machine so wobble caused by the motor is not likely to happen but usually people will think the motor is causing the problem since they have no idea what to do so they need to find something to blame.
    • If you think the motor is causing the wobble, you can try to use a smart phone eg. Iphone or Samgsung. There is an apps which can defect the vibration. You mount the motor on a panel or an arm and put the smart phone on it, then use the apps to monitor the vibration with or without propeller. If the motor is the source of wobbling, then you should see that vibration reflects on the apps.
    • You may also take off all propellers of a Quad, then put the smart phone on the center of the Quad, then monitor the vibration by apps.
    • Remove the prop mount and test the motor one by one (only one motor at a time), push the throttle up and listen to the motor sound to hear if it is good or not. If you hear strange noise, then there could be a problem in bearing so you need to change the bearing or main shaft.
    • Sometime the problem could come from the prop mount. If the sound from the motor is nice without prop mount but you hear noise after installing the prop mount, then you might try to change a different prop mount and retry.
    • There is a soldered part with AWG cable inside the heat sink tubing. If you pull the cables too hard during DIY, then the soldered part of the cable would be loosed and it would cause stuttering (cannot spin at all). You can remove the heat sink tubing to check. If yes, then you can solder it back.

Is The Motor Thrust Datasheet Accurate? (Why Different From My Test?)

The motor thrust test table is based on the benchmarking result either from the factory or from us. It is always different from your own test result (don't panic now, read on) because the test equipments used for the test are not the same especially the motor thrust stand. No one can claim that the motor thrust stand he is using is 100% accurate and correct (different angle or different length between three pivots could result different thrust).

Also it is incorrect to use a battery (none constant input voltage) to test the motor thrust and compare with the thrust test table only using *amps* because the factory and us usually use constant input voltage from power supply to test the thrust at the fixed voltage input.

We and the factory cannot guarantee the thrust datasheet is 100% correct but at least it should be close to. However, the RPM is accurate because it is usually measured using Hz Calculation or Optical RPM Tachometer which both are pretty accurate. Higher RPM results in Higher Thrust.

Last word, the thrust datasheet is for your reference only, and it does not mean you will have the same thrust because the test we have done so far. Even the same setup with three different ESCs would result different thrust (The ESC controls the Motor). Even same ESC and same Stand but with different firmware version or settings (eg, Timing) flashed on the ESC could also result different thrust.

No complaint / replacement / refund / exchange will be accepted by us for different trust you measured. So please do not purchase a motor from us if you do not agree.

My Motor Is Getting Very HOT. Why?

A motor gets very hot might due to

    • Mounting screws are touching the windings (copper wire) inside the motor.

      You must check carefully whether the mounting screws are touching the windings (copper wire) inside the motor or not. The mounting screws should not touch the windings otherwise the motor will get overheat and burn the motor and ESC eventually. The screws shipped (AS IS) with the motor could be too long or too short for you depends on the thickness of the panel where you mount the motor so it is out of our control and it is totally your responsible to check before using it. No replacement or refund will be offered for this negligence by customer.

    • ESC Problem.

      Sometime if the ESC is not compatible with the motor, it could cause the motor overheat and finally burn the motor. Especially for the combination of Multirotor ESC and Motor. Some people try to flash a new firmware to the ESC and they do not know not every firmware (even the same firmware but different date) is compatible with the ESC. Some firmwares would cause overheat on both ESC and Motor.

  • Over Loading.

    Your motor is overloading weight. You need to benchmark the motor thrust and compare the flying weight properly.

    Most of the time, the motor gets too hot because of wrong combination of Motor Size/KV + Battery Cell + Propeller. Lots of people think they can use any propeller and battery they like for the same motor but this is totoally wrong. You should either use a smaller propeller or lower the battery cell or lower KV motor.

    For each propeller and battery combination you use, you should benchmark the motor to check the temperature. If it is too hot, that means you should not and cannot use this combination. There is no problem with the motor but usually people's thought.

My Motor Seems Stuck (Hard to Spin By Fingers). Why?

Each motor has been connected to an ESC and tested manually after assembly in the factory so receiving a motor that does not spin is almost impossible especially if more than one motor does not work.

You need to check the followings in order:

  1. You must check carefully whether the mounting screws are touching the windings (copper wire) inside the motor or not. The mounting screws should not touch the windings otherwise the motor will get overheat and burn the motor and ESC eventually. The screws shipped (AS IS) with the motor could be too long or too short for you depends on the thickness of the panel where you mount the motor so it is out of our control and it is totally your responsible to check before using it. No replacement or refund will be offered for this negligence by customer. Thank you for your kind attention.
  2. Just in case if the motor is completely stuck (you only need to separate the motor bell when the bell is completely stuck). Open the motor and see if there is anything (eg. tiny metal / staple) stuck inside the motor?
  • If you do not know how to open remove the motor case, please search "change bearing or change motor shaft" on youtube, then you will see lots of videos to show you how.
  • Because there are magnets inside the motor so any tiny metal could be stuck inside. You may try to use a high power vacuum cleaner to suck the motor, and try to clean up if anything stuck at the magnets.

If your motor is not completely stuck (it means it is just not smooth and sometime may have tick noise because of glue). Connect the ESC and spin the motor between 10-50% throttle for 10-30 seconds (do not mount any propeller). Please never spin the motor at full (100%) throttle without a propeller because such high RPM would damage the motor bearings and shaft.

When a motor is brand new, it sometime happens like this (we assemble many Multirotor copters daily so we have experienced this a lot). Because the factory would put some glue on the motor stator and magnets so you may feel hard to spin it by fingers sometime (the glue on magnets and stator touching each other) but if you spin it for few minutes, then the motor will become smooth again.

The motor, bearings and shaft are all brand new so the motor is completely fine so some people said they have received a motor with bad bearing is also impossible. This issue happens usually just few out of a thousand so it is rare to see. Most people would think the the motor has a bad bearing but the bearings are all brand new so this is almost impossible especially a bad bearing won't cause a motor bell not to spin freely. Instead, the motor with a bad bearing would only cause the motor ​twitching (shaking) during flight.

My motor does not spin, it is just jittering. Why?

Each motor has been checked on working condition after assemble by the factory to make sure they at least will spin.

If your motor is jittering and it does not spin together with a "Di Di Di..." sound. It is usually due to the loosed connection on one of the cables between ESC and Motor. If you pull the motor cables too hard during installation or after a crash (motor dropped out and pulled too hard), then the soldered part (usually covered up by the heat sink tubing) of the cable would be loosed and it would cause stuttering (cannot spin at all). You can remove the heat sink tubing to check. If yes, then you can solder it back properly.

A motor would not have any broken copper wire inside if the it works for the first time because you think about it is copper wire so it won't break even you use your hand to pull it hard. The copper wire will break only when it is after a crash.

You may also need to use a another ESC (remember to setup the throttle range first) to test the motor because sometime the problem could be caused by the ESC. Please also try another ESC If you have an ESC of other brand.

Please try to test the motor using a traditional ESC eg. HobbyWing ESC (with traditional HobbyWing firmware). Because some people might have trouble with BLHeli ESC (they do not know how to configure the BLHeli).

My motor is noisy at high throttle. Why?

This happens (at the time you can hear the noise) only if you spin the motor without mounting a propeller at high throttle. Spinning a motor without a propeller at high throttle is totally a misoperation because a motor bearing is incapable to handle such high RPM (speed). This misoperation might damage the bearing inside the motor and caused the motor overheat, noisy and shaking.

A motor will never spin at such high RPM (speed) in real flight so to judge a motor is bad (factory defective) by doing this is a wrong method. Therefore, a free replacement or refund will not be gained by showing this because the noise will not appear after a proper size of propeller is mounted before spinning the motor.

My motor is ​twitching at high throttle. Why?

This is due to the ESC cannot handle high RPM (all ESCs have this issue depends on the RPM speed you are pushing the motor). This issue appears if you test the Motor and ESC without mounting a propeller at high throttle but it is wrong picture you are seeing because you will be flying with a propeller (not a plain motor).

The larger propeller the slower RPM. So when a propeller is installed on the motor, the RPM of the motor will be much slower so you will not see motor ​twitching again. If you still seeing it ​twitching, then you need to purchase the latest high performance ESC with high speed MCU (eg. XRotor or BLHeli ESC which can work work with the high spec. KV motor (high RPM).

Some people with less experience would claim the ESC had no problem when it was used with another motor with thousands of flight so they would say it is the problem of the motor. But it is totally wrong. This is not a problem of the Motor or ESC but combination (Between Motor / Prop / ESC / Battery). You need to get a new high performance ESC instead of using an old ESC with high Spec motor. Only use an old ESC with an old low Spec motor.

There are few other things that might cause twitching:

  • Soft mounting on flight controller (the vibration could cause gyro on the FC unstable) to reduce vibration.

I smell something from the motor while testing. Why?

You could smell something similar to "burning smell" during testing when a motor is new (never been used). This is normal because when we test the motor on thrust stand, some motors have this kind of smell too. The smell will be gone after a while. However, not every motor will have this kind of smell.

If the motor is defective (eg. short circuit), the motor would burn itself with spark and you will see the wire inside the motor would turn black (actually you will see it burnt). Otherwise, the just with the smell is totally fine. If you are still worried, we suggest that to return back to us for refund in original condition.

Help! My motor shaft is loose from the motor CNC case.

There are advantages and disadvantages to glue the motor shaft into the CNC Motor Case (or bearings). Some factories would use "Loctite 638" on motor shaft and bearing to make sure they will not loose during operation. However, the main disadvantage is that you are difficult to change the motor shaft later because this "Loctite 638" was designed for this purpose and it is a super strong glue.

However, if the motor shaft is unluckily loose from the motor (if you change the motor shaft, the CNC hole will become larger than before too), then it is better for you to apply "Loctite 638" into the hole before you push the shaft back into it.

"Loctite" glue is a famous brand worldwide which you can buy it in your country. Please google if you cannot find it from a nearby hardware store.

2205-2206 size motor can usually generate the trust of about 800-1000g, if you pull the propeller hard by hand, you can normally generate the thrust of 5-10kg. If you cannot pull the motor bell out by hand, that means it is not likely to loose during flight too.


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