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Old Sep 16, 2015, 03:34 PM
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Mini-Review
XK "AIR DANCER" X350 (Under construction)



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





+ 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)





The bag of accessories and landing gear




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





-Side view



-Rear view



-Upper view



-Bottom view




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





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




Standalone the X350 weights 467g,






Landing gear seems strong



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.







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





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









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.





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



Motor

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






The inner shaft diameter is 5mm



The hub is 7mm at minimum



and 8mm at maximum diameter

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Last edited by SeByDocKy; Sep 19, 2015 at 07:45 AM.
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Old Sep 16, 2015, 03:34 PM
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Disassembling

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










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





The good news, they have the "Air Brake" 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





connexion to the PDB



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





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



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



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. Generally speaking, the following mapping between throttle stick position (in %) and motor speed is applied : [-90 , 30 , 90] for [0 , 50 , 100]%

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 !!!!!

XK X350 caution about the 3D switch (3 min 17 sec)


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.




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





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






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


XK X350 first outdoors test (Courtesy Banggood) (8 min 53 sec)


XK X350 new flight testing (Courtesy Banggood) (8 min 28 sec)


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

XK X50 "Air Dancer" Unboxing and quick analysis (Courtesy Banggood) (22 min 24 sec)



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 brake"
+ 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 (durability of the pastic canopy ?)
- 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
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Old Sep 16, 2015, 03:35 PM
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Old Sep 16, 2015, 03:36 PM
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Old Sep 17, 2015, 05:33 AM
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Good review and flight SBD. Looks nice per your work... and agreed, folks need to be careful of accidental throttle reverse in 3D and arming of motors. I look forward to more videos as you gain experience with this high powered quad.
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Old Sep 17, 2015, 06:17 AM
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Excellent review!XK has put out a great looking quadcopter here.with some really nice features.I have been looking at a few quadcopters in this performance and price range,now this is one I will seriously consider.Here is a link with lots of details on this quadcopter,I think this may be the next level quadcopter I have been looking for.http://www.gearbest.com/rc-quadcopters/pp_238583.html
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Old Sep 17, 2015, 07:12 AM
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Quote:
Originally Posted by kydawg1 View Post
Good review and flight SBD. Looks nice per your work... and agreed, folks need to be careful of accidental throttle reverse in 3D and arming of motors. I look forward to more videos as you gain experience with this high powered quad.
Hi,

The review is far to be finished ... so for sure more Advanced comments and conclusions will posted soon. I wanted to share asap first elements with this new model ... but my first impression are positives
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Old Sep 17, 2015, 07:14 AM
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Quote:
Originally Posted by aben71 View Post
Excellent review!XK has put out a great looking quadcopter here.with some really nice features.I have been looking at a few quadcopters in this performance and price range,now this is one I will seriously consider.Here is a link with lots of details on this quadcopter,I think this may be the next level quadcopter I have been looking for.http://www.gearbest.com/rc-quadcopters/pp_238583.html
Well the BG price including shipping is 240...
http://www.banggood.com/XK-X350-4CH-6-Axis-3D-6G-Mode-RC-Quadcopter-Air-Dancer-Aircraft-p-974719.html
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Old Sep 17, 2015, 08:25 AM
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I've really enjoyed flying mine since I got it. It's fast, very stable and can take a few tumbles without breaking anything. I thought I might have broken a landing gear by now, but I haven't.

If I had any gripes it would be that it needs brighter lights. I find them all but useless on a bright day. You can't see them blinking when calibrating the gyros, but it seems to bind and calibrate pretty much in one second.
And the landing gear was very hard to put on, even with my own Allen wrench it was tedious. Maybe enlarging the holes in the gear would have helped. Right now you have to thread the screws through the gear and into the body, so you can't really tell if it might be cross-threaded.
And plugging the battery in and bending the wires so they fit in the compartment has not become second nature yet. Nor pulling the wires out and unplugging the battery. The quadcopter basically dangles while doing this. I hadn't thought about using the lower right toggle switch to kill the throttle. Good tip.

I was hoping the camera port would have fit the little camera that came off my WLToys V686G, but it doesn't.

Minor things compared to how nice this is to fly.
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Old Sep 17, 2015, 10:30 AM
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Quote:
Originally Posted by pacanis View Post
I've really enjoyed flying mine since I got it. It's fast, very stable and can take a few tumbles without breaking anything. I thought I might have broken a landing gear by now, but I haven't.

If I had any gripes it would be that it needs brighter lights. I find them all but useless on a bright day. You can't see them blinking when calibrating the gyros, but it seems to bind and calibrate pretty much in one second.
And the landing gear was very hard to put on, even with my own Allen wrench it was tedious. Maybe enlarging the holes in the gear would have helped. Right now you have to thread the screws through the gear and into the body, so you can't really tell if it might be cross-threaded.
And plugging the battery in and bending the wires so they fit in the compartment has not become second nature yet. Nor pulling the wires out and unplugging the battery. The quadcopter basically dangles while doing this. I hadn't thought about using the lower right toggle switch to kill the throttle. Good tip.

I was hoping the camera port would have fit the little camera that came off my WLToys V686G, but it doesn't.

Minor things compared to how nice this is to fly.

Yes you are right, allen screws are hard to insert (one of mine is not perfect) and the battery insertion not so easy. I regret the absence of a power switch ...
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Old Sep 17, 2015, 02:15 PM
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At first start up smoke came out

I am an new member of rc groups. I hope anyone can help me with my problem. I received last friday the x350 and it is a very nice quadcopter to see. But further I can not say anything how it flies because then the problem started. The first time I started the x350 the tail led started to blink and the left two motors where not spinnin correctly so I stopped. When I opened the batery tray smoke came out. Now the two left motors are not spinning anymore. Technical I am not very good but maybe I can solve it with your help.
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Old Sep 17, 2015, 02:22 PM
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Quote:
Originally Posted by XK x350 owner View Post
I am an new member of rc groups. I hope anyone can help me with my problem. I received last friday the x350 and it is a very nice quadcopter to see. But further I can not say anything how it flies because then the problem started. The first time I started the x350 the tail led started to blink and the left two motors where not spinnin correctly so I stopped. When I opened the batery tray smoke came out. Now the two left motors are not spinning anymore. Technical I am not very good but maybe I can solve it with your help.
With some smoke ... I am afaid they was a shortcut somewhere. Please contact your sellers for an exchange
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Old Sep 17, 2015, 02:27 PM
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At first start up smoke came out

Thank you for your fast reply!! I already have contact with BG but they want to send me one motor. I think they dont take me serious! I ask for a new one but now they are not responding any more.
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Old Sep 17, 2015, 02:43 PM
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Quote:
Originally Posted by XK x350 owner View Post
Thank you for your fast reply!! I already have contact with BG but they want to send me one motor. I think they dont take me serious! I ask for a new one but now they are not responding any more.
For me it's more ESC than motors ....
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Old Sep 17, 2015, 02:56 PM
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Yes I think you are right. The strange thing is that after the smoke the front left motor, the rear left motor and the leds at the bottom front left and rear left didnt work any more. So maybe some control unit which is responsible for this has been burned.
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