TEST: XK X350 “Air Dancer”, a new Deluxe 3D quadcopter

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INTRODUCTION

As you may already know, XK is the new “deluxe” division of WLtoys for their high level helicopter/multirotor models. After the excellent XK X380, the new revision of the V303, here is the XK X350 a full brushless 3D 350mm quadcopter. For this model, XK designed everything from stratch. It’s not the first 3D quadcopter from WLtoys, the X350 comes after the cloning of the stingray 500, i.e. the WLtoys V383. Here, the 3D is not based on a collective pitch technology but based on some reversible ESC. Please find my first elements about this X350, I will complete this review step by step.

BOX CONTENT

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+ 1 x XK X350 “Air Dancer” (with a 3S 2200mAh LiPo, 50C ending with XT60 connector)
+ 1 x Transmitter (using 6xAA batteries not included)
+ 1 x Charger/balancer
+ 4 x Propellers
+ 1 x Prop wrench
+ 1 x Camera holder
+ 1 x Screwdriver
+ 1 X Allen key
+ 2 x Instruction manuals (for the X350 and the Radio)

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The bag of accessories and landing gear

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OVERVIEW

The X350 design is based on a H-frame with a full plastic plastic. The general quality of this plastic is good and dense

-Front view

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-Side view

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-Rear view

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-Upper view

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-Bottom view

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2 ports are available. One +12V and one servo plug

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Be aware, for the servo plug, pinout is inverted versus the instruction manual

Standalone the X350 weights 467g,

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Landing gear seems strong

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2 hexscrews per foot. You have to pre-insert them before to attach them on the main body. One of Hexscrews was damaged (the head not perfectly molded). I used a wrench to screw it.

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A camera mount can be also installed if you plan to attach a sport cam and/or a FPV kit

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LiPo

A 2200mAh 3S LiPo with a very good 50C of discharge rate ending with XT60 connector. 3D flight requires a lot of instantaneous juice

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This LiPo fits almost all the battery bay. Probably a longer one can be installed but I think due to the bay design, it won’t be possible to insert it.

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Propeller

Some 3D specific 8 inch model. Unfortunatly, no spare props are offered !!!… It’s a real pity especially for a 3D model where probability to crash is increased

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Motor

Some 2212 model announced to be 1400Kv!!!!

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The inner shaft diameter is 5mm

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The hub is 7mm at minimum

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and 8mm at maximum diameter

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Disassembling

After a long unscrewing session, you can split in two the plastic body

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ESC don’t have any indication but probably are some 20A model

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The good news, they have the “Air Break” feature, stopping in a fraction of second rotation of props as soon as throttle is 0

The main Power distribution board welcomes the FC isolated with a piece of foam

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connexion to the PDB

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A free servo plug probably allow to connect an external receiver probably in CPPM or Sat connexion

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The MCU is of course based on a 32bits ARM core and an invensense 6050C for the 6-axis stabilization

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The RF chip is the excellent CC2500 (the same than for the FrSky protocol). The Radio protocol is the Futaba one. Expect close to 1km of range control

Transmitter

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The transmitter eats 6xAA to be powered. Four 2-way switches ca be found. The right ones are D/R and throttle hold respectively. DR0 turns A,E,R to 80% while DR1 set them to 100%. The left ones turn on/off gyros (horizon/accro modes) and the left upper switch turns the throttle into “3D-CP mode” mode: Above 50%, it applies positive pitch, here props spinning in the conventional way, below 50% it applies negative pitch so ESC reverse sens or rotation.
BE AWARE!!! AS SOON YOU TURN THIS SWITCH, MOTORS WILL TURN AT FULL SPEED IF THROTTLE STICK IS IN LOWER POSITION. IT CAN BE DANGEROUS !!!!!

Be aware to well tighting your prop locks because when inverted, the inertia tends to unscrew prop locks.

In a general way, there is no arming sequence !!!!!! so again potentially dangerous. Luckely, you have a throttle hold.

This radio have a quality chassis, mecanics are goods. Versus the XK X380, the X350 TX settings can be partially changed.
For example, you can set individually for each A,E,R channel D/R, EXP, the tradeoff between the Horizon/accro mode via the Gyro weighting.

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Seems to have a free plug, so maybe there is an extra channel (the 5th ?) potentially available.

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The rear jack is a trainer port working in PPM mode.

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FIRST USAGE

The XK X350 is first of all a very powerful machine. In 6G, the autolevelling make easy controls for beginners … The yaw rate is good (in any case, you can play with it via the setting of the radio). Even with 700g, as soon as you are pushing throttle, motors becomes loud and catapulte your X350 in the air … For sure, the 50C LiPo helps a lot. The full rate already offers impressive rate and it should be possible to reverse the X350 even in 6G, so it’s a good point if you want to perform 3D without beeing a good “ACRO” flyer.

To use the 3D switch, I advice two situations:
i) The X350 is already in the air, your throttle stick about 50% (in non-3D mode) then when you push the 3D switch, you should not observe a huge positive or negative jump… It’s a pretty smooth transition between the non-3D & 3D modes.
ii) The X350 is on the ground. I advice first to turn on throttle hold (upper right switch) then to push throttle about 50%, then to turn on the 3D mode and finally to disengage the throttle hold… It would be more safe like this.
In 3D mode, the throttle control is very similar to a CP helicopter. Good news, there is trainer port, so you can train to fly 3D with a CP helicopter software. With the 2200mAh, you can expect 8-9 mins of flight times…. it’s pretty good for an acrobat model

CONCLUSIONS

To make short, I really really like this quadcopter … Not adapted for ultra beginners, but with a nominal level skill you can for sure fly this quadcopter at least in 6G mode. Thanks to TX programmable capacity, your can set indivudually behaviour of each channel. It’s a powerful machine, very fast (maybe faster than the HiSky HMX280) and with a beautiful design. In acro mode, rates/angles are just amazing so perfect to fly inverted. Maybe I regret, as we can find for some basic toys, there is no button to flip automatically of 180 degrees the X350.. It means, you need a nominal level skill to fly 3D. I regret also the absence of some arming sequences (for some obvious safety reason) , spare props in the bundle and a power switch. Even if the stucture seems solid, without any carbon elements and with a total weight of 700g, the crash resistance is also an open question. A positive point is the presence of a 12V power port and a free 5th channel to control a camera trigger for example.

UNBOXING

PROS

+ Beautiful machine
+ Super stable machine in 6G
+ Very sporty machine from Acro mode
+ Nice packaging
+ Programmable radio
+ Trainer port (PPM)
+ Futaba protocol (~1km of range in LOS conditions)
+ 50C LiPo
+ Powerfull motors (1400 Kv)
+ ESC “Air break” feature
+ Free 12V & 5V port for FPV connexion

CONS

– No arming procedure
– 3D switch activation can be dangerous
– No spare props
– Battery insersion and door’s closing
– No Carbon structure
– No “Ultra Easy3D” with 180 degrees automatic flips (like for toyquadcopter)

This quadcopter have been courtesy provided by Banggood in order to make a fair and not biased review. I would like to thanks them for this attitude.

You can find it actually for 230USD at http://www.banggood.com/XK-X350-4CH-6-Axis-3D-6G-Mode-RC-Quadcopter-Air-Dancer-Aircraft-p-974719.html

57 Comments

  • Cody says:

    I purchased an xk x350 props spin in reverse pushing quad down on start up till throttle reaches 50 percent than props reverse forcing air down all this in 6g mode. How can this be fixed in order to fly in beginner mode and no I’m not a novice to quadcopters. Can anyone help me with this issue or is my xk x350 defective.

    • SeByDocKy says:

      I am not sure to understand, but you mean in 6G mode (not in 3D), below 50% throttle, you props spins inverted and above 50% spins “normally” ?
      Are you sure to be in non-3D mode ?

  • Randy says:

    My light in back turns green initially but turns red even in 6g after 1 sec. Props turn for a short time and then nothing. Can’t even get it off ground. My 4 levers are all pushed forward away from me also.

    • Roger says:

      I have the same problem. I took it all apart and put it back together, I don’t see anything unusual to cause this. Did you ever get yours fixed?

      • Cody says:

        whats the problem? are the blades spinning in reverse reset the pitch curve settings will fix thst problem

      • cody says:

        set throttle curve 25 35 45 65 85 pich curve 60 60 60 70 80 if your numbers sre not increasing in value it will reverse the spin rotation

  • Rahul says:

    Hi
    I have ordered xk x350 for me and i m also planning to buy a XK STUNT X350 RC Quadcopter 700TVL 110/148 Degree Camera 5.8G 32ch 200mW FPV Transmission (FPV kit)
    I just wanted to know would i be able to connect the fpv with an Eachine Racer 250 FPV Drone 7 Inch 5.8G 32CH Diversity Wireless Monitor.

    • SeByDocKy says:

      Yes no problem …. On the XK X350, you can grab some 12V for your FPV kit. You 32CH FPV monitor will be able to capture the transmitted video, don’t worry

  • Maxim says:

    I dont have luck with my XK X350. After a while it suddenly started to speed up one of the motors while hovering in 6G mode resulting in a flip/crash. So i opened it, disconnected 3 Motors from power board an speeded up one motor, just to check if there are vibrations. I did so for each single motor. There were no noticable vibrations. After that i did a factory reset of the transmitter. Now i ve got following problem:
    ALL 4 MOTORS ARE SPINNING IN WRONG DIRECTION!
    Nick and roll are reversed too.

    What the hell happened???

    • SeByDocKy says:

      Are you sure to correctly replugged all your motors ?

    • Tony says:

      The factory reset messes up the receiver, in the receiver you need to go in the modes an change the throttle and pitch curves.
      Throttle curve – 0, 25, 45, 65, 85
      Pitch curve – 60, 60, 60, 75, 100

      SeByDocKy, i think companies with absolutely ZERO customer service should quit getting reviews?

  • Maxim says:

    Thank you a lot, Tony. After making this settings, the motors spin at start in right direction. But after few seconds they just stop and dont spin anymore. Have to calibrate gyros maybe. Gonna make a testflight today

  • Maxim says:

    Ok, i was testing my X350 outside today. First attempt: binding, green light, calibrating gyros, start to hover. After about 10 sec It drifts away; landing. No response on throttle anymore, motors dont spin. Battery off, TX off, then TX on, battery on – yellow light, no binding. Next attemp – no light at all. After few tries it binded finally, so i brought it to hover again. About 20 sec later the drone goes crazy – i let it fall into gras, nothing broken.
    What could it be? Problem with receiver? Gyros? TX maybe?

    • tony says:

      I dont know, i burned up the PDB an a motor after doing the factory reset an was told thats how you fix it, i am still waiting for parts for mine, XK has no customer service an i sure wish SeByDocKy would try an get ahold of someone over there on this issue

    • SeByDocKy says:

      Hummmmm sounds not very good. Can you open it and see if there is no unsoldered wires ? or burnt chips?

  • matthew says:

    I purchased a X350 drone from a private party (was told it was brand new, never flown) and have no reason to believe otherwise. When I plug in the battery to the drone, the back dome red and green LED light both illuminate. I turn on the controller. None of the LED lights on the four legs of the copter are illuminating. Drone does not seem to be connecting with the controller. Any thoughts?

    • SeByDocKy says:

      Try to rebind it: press the tiny button Inside the battery bay during more than one second when the battery is plugged… then turn on your radio very close to your X350. If the binding is ok….. you should see a green solide light (if you are in 6G) or a red one if you are in 3G

    • Cody says:

      There is a reset button small black button inside battery compartment press button for three seconds with battery plugged in a remote on then pull both throttle and pitch levers on remote down and out should recalibrate then light will turn green good luck

  • laurélli pascal says:

    bonjour peut t-on passé en mode 1 la radio merci

  • Carlos says:

    Hi guys, I have a serius problem with my XK X350, it have more vibrations in the motors when I push up full the throttle, can someone help me with this big problem ??

    best regards !!

  • Attila Dobos says:

    Tx direction can be reversed throttle?
    I’m driving mode 2. reverse throttle.

  • Attila Dobos says:

    I put Tx battery.
    How do I spend, not to remove accumulators?

  • Attila Dobos says:

    I can not turn the Quadrocoptert. Only biip, the LED is not illuminated.
    What to do?
    https://youtu.be/WM0ron4-oPM

  • Attila Dobos says:

    I took it apart and tried to radio Devo, and the Devo receiver connected to the ESC directly request of the buyer. ( one by one. )
    ESC will beep three times faster than video, but do not start the engine.
    I looked at each separately, none of them starts.
    What could be wrong?

  • Attila Dobos says:

    I tried on!
    Devo Tx, Rx and Tx when the throttle is in the middle, and you turn on the ESC, the ESC begins. Throttle motor starts to move to the right, move the throttle the opposite direction, the engine starts left .
    All esc work like one by one.
    The ESC s stuck in 3D mode?
    I can not start a factory Tx.
    What to do?
    Can the controller and the receiver to factory default reset?

  • Attila Dobos says:

    Is there anyone here who can help me?

  • Attila Dobos says:

    Next battery connections only tweet again.
    What could be the problem?
    Can somebody help me?

  • Max says:

    I wanna reset all my x6 transmiter , how can i do pls

    • SeByDocKy says:

      You changed some values and want to have the original X350 value ? I wrote the main important one in the article. You can set them manually and enjoy 3D

      • Max says:

        Yes can u give me configuration for xk x350 here pls ? Cause have some trouble to fly good .. when i push up throtell he go on right down way i dont understand why …

  • Guy Who Posts says:

    so i bought this thing about a month and a half ago, now. when i got it i flew it around and landed it just fine. the next day i start doing some somethings out of 6g mode, but when i switch it back to auto leveling it slows down and throw a propellor. it crashed and broke. so just yesterday i received 2 new sets of propellors and a new top case. i replace what needs to be replaced. ready to test i plug in the battery. dead, of course. only one motor spins but slows to a stop, as it would when its dead, although im unsure why only a single motor spins. anyway, i plug the battery into the charger… nothing. the power light on both the power brick and the charger itself is on, but the charge light remains off. i leave it plugged in next me for a few hours while i sit on my computer… it doesnt charge, i plug it back in, one motor spins and slows and stops. so the battery works, at least a little, but it wont charge. what do i do?

    • SeByDocKy says:

      I am afraid your battery is too weak….. and is below the nominal charger is allow to recharge…. If you can access to a real charger, try to charge just a few second in NI-mh mode… to go above 3.3v per cell then resume the LiPo charging program

  • Jakob says:

    Seby?
    you left an open questionmark o your review hence ESC values on this bird.’
    I have been looking into it, and it does seems it is 20A as you assumed.
    Useally 20A ESCs are valid for 2-4S lipo’s and not least massive 2212 1400kv’s motors.
    How do you reckon would this quad be valid for an 4S lipo?

    • SeByDocKy says:

      Well if with modern ESC@20A I can reckon than 4S should possible with the old one installed on the X350 I can’t promise it will work at 100%…. It should but no guarantee 🙁

  • hai seby, how are you ?
    i just buy this quad 2 week ago and now has arrive
    and in my first flight i found the body and the propeller cant handle power from motor when i set trotle max to 100%
    this happen when reach 100% trotle, drone shake really hard, maybe some esc or motor is not going well, and the drone flip in many time and boom crash T_T
    just want to know, any chance i can use another props to this quad ?
    thank you

    • SeByDocKy says:

      The problem is hard to find some alternative for 3D compatible quadcopter …. 🙁 that’s the main problem :(…. But yes seems the default internal PID are not well tuned 🙁 …

    • Anonymous says:

      Buy a new frame, the stock frame is too weak for the motors

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