TEST: QW350-2

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INTRODUCTION

Here are the first elements of my mini-review of the new DJI phantom clone, the QW350-2 from Plastic shenzen chitwan compagny. This model of course is including GPS, compass and baro for GPS lock and RTH but also a full 5.8G FPV system. All the setup for around 360 USD…We will see if the quality have been sacrified

BOX CONTENT

+ 1 x QW350-2 (with a 3S 2700mAh, 20C LiPo ending with JST connector )
+ 1 x Transmitter (using 4xAA lithium batteries included)
+ 1 x Props wrench
+ 1 x Charger for the LiPo battery
+ 1 x Charger for Lithium batteries
+ 1 X Phone holder to use your smartphone as camera
+ 8 x Spare 8045 props (4 CW, 4 CCW)
+ 1 x Instruction manual (English/Chinese)
+ 8 x Stickers (4 blue, 4 red)

OVERVIEW

front view

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side view

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rear view

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Some free room is available mainly in height

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bottom view

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2 attach system is available in the front and the rear parts. Nice initiative to attach a GoPro or the proviced smartphone clips attach

The 433Mhz antenna is located on the rear right leg

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while the 5.8G antenna is located inside the battery bay

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The front left attach of the landing skid welcome a 1.25mm mini-JST 5p connetor.

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This one must be used to connect the PC software (see below)

Same type of LEDs as for the Phantom

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Without battery, the weight is

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and with the 2700 battery

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Battery

A 2700maH 3S LiPo with a discharge rate of 20C… Maybe a little bit weak for it offers around approximatively 13min of flight

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Disassembling

It’s very easy to open the top canopy part. Only 4 screws per arms. In 3 minutes, you can open it. A good point for maintenance. The general quality of the soldering job is very positive.

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The GPS module is hidden behind a RF shield

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Motors

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Some 22 type motors, no KV mentionned probably very similar to the phantom ones

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ESC

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No mention about the maximum supported amperage… I will look for more information. The soldering job is very clean

Flight controller

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A large 8 bits ATmega chip …

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the L883 as compass and MEAS for barometer. This architecture is very known …. smell like APM compatible and the answer is YES !!!. It’s arducopter compatible !!!! you can connect the QW350 to the mission planner software via the FTDI cable. I made one with a mini-JST 5p.The black wire is GND, red is +5V, yellow is RX and green is TX (you will have to invert RX<->TX and TX<>RX with your FTDI device). Here is wiring diagram to build your own cable.

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Notice also the presence of a BGC free port probably to control a gimbal ? I have to investigate.
Finally, there is an UART port… Maybe to connect a telemetry/Bluetooth device. Need also an investigation.

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On top right of the PDP, a switch can be installed… I don’t know for which usage

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FPV camera

A nice model of FPV camera. The color are sharp and light sensitivity relatively good.

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Unfortunatly the FPV camera is fixing the ground. You will need to mode the canopy to fix it horizontaly

Receiver

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The bind button is located on top

5.8G FPV transmitter

Located under this black heatshrink. Assumed to be a 400mW model working in boscam band AFAIK. Notice the presence of a uFL connector.

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A free port to install a 1.25mm 3P switch is available

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Transmitter

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Only two 3-way switches are available.
The left one selects flight mode:
– upper position: manual mode
– central position : altitude hold mode
– bottom position : GPS lock position mode

The right one selects emergency modes:
-upper mode : no specif action
-central position : RTH (GPS mode must be engaged too)
-bottom position : Emergency landing

2 tiny switch buttons are located behind

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The “red” one is the bind button if I translated correctly from chinese. I think you have to press both this tiny TX bind button and the RX one to renew the binding procedure. To access the RX bind button, you will need to remove the top canopy part of the QW350.

The other tiny switch button is to activate Lithium. I never pressed on this one even if instruction manual says to do…. It works directly to charge the batteries

4 Lithium batteries

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The RF chip. As you can see differents frequencies are avaible covering the 433Mhz and 700-800Mhz

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2 free connector available on the TX PCB. Maybe a way to install to extra pot to control a gimbal ?

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FPV monitor

A 4.3″ size approximatively without any sun shade… To be honest, it’s almost impossible to see something in day-light condition.
You will need install one. The quality of the screen display is not fantastic…. but you can tune contrast, brightness via the menu.

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As you can see in the unboxing video, the two upper button are used to navigate between sections of the menu. The central button is the “OK” button while the last two ones select different suboption inside a category. There is also builtin DVR welcoming a microSD card. A good point if you want to record or take photos of your FPV session. Videos in the DVR are recorded in 720×288

A RP-SMA connector is present…. a good point to install your favorite 5.8G antenna

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On the left side of this RP-SMA connector, a tiny switch button cycles bethween the 9 boscam frequencies. By default, the QW350-2 is set to 5945Mhz (freq 8 in the FPV monitor)

FIRST USAGE

As you can see, it’s a very sporty quadcopter out of the box with a lot of power available (especially with 9 inch props). Anyway, I don’t know if the electronics were perturbated by my GoPro clone camera of by some metallic strucre elements, I found in GPS hold and hold position modes some extra woobles, instabilities and even some deviation/shiftting/flyway in pure GPS hold mode (even afte a solid compass calibration via the mission planner software). Without the gopro cam and over grass no more drifting observed… I have to investigate this important point. Flight duration is in averarage of 13-15min.

A GPS hold and RTH demo

GIMBAL INSTALLATION

I decided to install my G-2D on the QW350-2

i) Use the +12V pad to install the power connector compatible with your gimbal. For me it’s a JST model

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protect with electical (liquid) tape to avoid any potential shortcut

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I connect the JST connector to my gimbal adapted for mobius

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Here is the result

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FPV CAM LENS ORIENTATION

In order to target more the horizon line. The actual camera is hold by this steepy plastic parts

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The idea is to cut front part of these two plastic holder and to insert the cam in sandwitch between the canopy and these two parts. More with this mode, you can reinstall the camera as initially.

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Result

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VRX Clover Antenna

VTX antenna mod

– Unclip the uFL connector

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– Untape the 5.8G plannar antenna

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– Clips the uFL connector of your SMA/RP-SMA coax cable

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– Localize where to drill the connector hole

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and drill thanks to a drimel

– Insert and screws your antenna connector

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CONCLUSIONS

Well, the QW350-2 is for me a little nice surprize. Pretty good FPV cam with OSD, good video link range, good radio range thanks to the 433Mhz freq. Be aware, the QW350-2 is a sporty quadcopter out of the box… so default settings are not really adapted for AP. I appreciated the general quality build for a 350-400 USD quad and the fact it’s arduicopter based. I only regret than the PC-connexion cable was not provided with my box. Maybe it will be included in some future batches. After modding the FPV camera orientation and adding a gimbal power port, the QW350-2 is even more interesting IMHO.

UNBOXING

PROS

+ Power full quadcopter
+ Compatible up to 9 inch props
+ Very well built (clean assembling)
+ Good packaging
+ APM/Arducopter
+ Nice radio working @433Mhz
+ Powerful Lithium batteries for the radio & FPV monitor
+ DVR included in the FPV monitor
+ Powerful VTX (400mW)
+ uFL antennas connectors (for both the 433Mhz and 5.8G parts)
+ Good FPV camera (good light sensitivity, approx 110-120 degreees of FOV)
+ OSD information via minimOSD
+ Easy mantenance
+ Price

CONS

– No FTDI cable to connect to the “Mission Planner” software (important to calibrate accelero and compass)
– Too sporty flight caracteristics out of the box
– No VTX frequency’s DIP switch on the quadcopter (but can be installed, 1.25mm pitch)
– FPV camera orientation (fixing the ground)
– Default PIDs values (some unstabilities/woobles especially in altitude hold/GPS modes)
– GPS sensitive to RF interferences (HD cam ?, metallic structures ?)
– No advanced instruction manual in the box
– DVR included in the FPV monitor buggy (can’t correctly stop file’s recording)
– FPV monitor menu navigation and stop recording keys combinaison
– No pot switches to control gimbal (but maybe it’s possible to add some)

This quadcopter have been courtesy provided by Gearbest 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 357 USD at QW350-2

8 Comments

  • Jim says:

    gearbest is a fraud the sell cheep then charge you 75$ for shipping don’t promote them

    • admin says:

      It’s true … it’s annoying to discover the bad suprize of the shipping fees at the end. But sometimes even with the shipping cost, they can be cheaper. Anyway, always check the best place to buy.

  • Ramon Alcivar says:

    Please Friends of Drone Maniac I Have a qw350 – 2 , and I want plug the telemetry set on the drone , in the rx board are a free conector with 5 pins , it is for telemetry set ?? please can you help me with the order of the wires ?? in the ftdi wire are one side connector for 4 pins and the other side connector for 5 pins like in the board of the drone. please help me to do it .

    • SeByDocKy says:

      You have to use the same FTDI port than for the mission planner connexion…. I tried to use the two other available UART… but I didn’t managed to use them correctly. Of course use only 4 pins over 5: GND, TX, RC and + 5V

  • Ramon Alcivar says:

    thank you Seby so , telemetry set can’t be used in this drome right ?? so I have another trouble , drone turn on motors ,but stop them 3 seconds after on , and the red leds what indicates the nose of drone light on but purple like the rear lights , so its indicate what the drone dont have nose , please help me Seby

    • SeByDocKy says:

      The Telemetru module can be used Motors stop 3s later after armming ? In anny flight mode ? even in pure manual mode ? Do you try to take off during these 3s ?

  • roberto says:

    hi.is there any way i can get a power distribution board for my guba 350-2 drone? thanks roberto

    • SeByDocKy says:

      Maybe in aliexpress…. but I am afraid the compagny doesn’t exist anymore. If it’s “just” the PDB, i think you can find an equilvalent. accepting 3S input and delivering +5V for the FC, receiver, and the FPV rig

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