Overview of the Chitwan QW350‑2 Quadrocopter

Introduction

One of the most pop­u­lar quad­copters that has gained cus­tomer accep­tance due to its very close resem­blance to the first series DJI drone. The QW350‑2 is a 350-class quad­copter with a brush­less pow­er plant, the main dis­tin­guish­ing fea­ture of which is the on-board FPV cam­era, which works in con­junc­tion with an ana­log video trans­mit­ter, which has nev­er been seen before on drones in this niche. And the built-in OSD mod­ule clos­es this tan­dem, thanks to which the dis­play of all com­pre­hen­sive teleme­try is pro­vid­ed on the screen of ana­log FPV head­sets. Fur­ther details in detail.

Equipment

• QW350‑2 quad­copter (with 3S 2700mAh 20C lithi­um poly­mer bat­tery with JST con­nec­tor)
• Remote con­trol (pow­ered by 4 AA bat­ter­ies, bat­ter­ies includ­ed)
• Charg­er (for quadric bat­ter­ies)
• Charg­er (for remote con­trol bat­ter­ies)
• Smart­phone hold­er (to use your phone as a cam­era)
• 8 spare rotors (8045 4 CW/4 CCW)
• Tool
• Instruc­tion (in Eng­lish and Chi­nese)
• 8 stick­ers (glue on the arms of the drone, 4‑blue; 4‑red)

Review

1. The bat­tery com­part­ment is quite roomy, espe­cial­ly in height.
2. The 433MHz anten­na is locat­ed on the rear right leg of the quad­copter.
3. 5.8GHz anten­na locat­ed inside the bat­tery com­part­ment
4. Equipped with the same type of LED as the DJI Phan­tom.

With­out bat­tery QW350‑2 weighs 624 grams. The bat­tery adds as much as 183 grams to the quad­copter. With bat­ter­ies, the weight of the drone is 807 grams.

In the test, the Chit­wan QW350‑2 quad­copter showed a max­i­mum flight time of 15 min­utes.

Disassembly

The quadric is dis­as­sem­bled very eas­i­ly and quick­ly, 3 min­utes is enough and you can clean the drone from dust and dirt from the inside. We note the excel­lent qual­i­ty of sol­der­ing.

GPS module

Motors

Motors: 2212 excel­lent repli­ca from “DJI Phan­tom”.

ESC controls

There is no infor­ma­tion about the max­i­mum cur­rent. Sol­der­ing qual­i­ty is top notch!

Control chips

Noticed a free BGC port, prob­a­bly for gim­bal con­trol. I was pleased with the pres­ence of a UART port that allows you to con­nect teleme­try via Blue­tooth.

Large 8‑bit chip from ATmega

fpv camera

The head­ing cam­era is good. By adjust­ing the light sen­si­tiv­i­ty and col­or ren­der­ing, you can sig­nif­i­cant­ly improve the qual­i­ty of the out­put image, which is impor­tant for a con­fi­dent FPV flight.

VTX

5.8GHz VTX is locat­ed under the heat shrink, the pow­er is 400mW. Works in “boscam” range.

Control equipment

The remote has a non-stan­dard shape and assumes an “Amer­i­can” grip (when the sticks are moved with only two thumbs).

Purpose of switches and PWR button

• Pow­er but­ton — divid­ed into three posi­tions (charg­ing mode, off / on)
• Two 2‑axis joy­sticks (“Throt­tle” left stick)
• The left 3‑position switch is respon­si­ble for chang­ing flight modes, where: STAB — sta­bi­liza­tion, ATLH — alti­tude hold, LOIT — cur­rent posi­tion hold;
• The right 3‑position switch is respon­si­ble for chang­ing the flight modes, where: OFF — dis­abling the tog­gle switch itself (for exam­ple, when using the left switch modes); RTL — return to take­off point; LAND — return to the take­off point with a land­ing.

The RF chip sup­ports the oper­a­tion of the equip­ment at three dif­fer­ent fre­quen­cies: 433/700/800MHz, which is good news.

FPV Monitor

A mon­i­tor with a diag­o­nal of 4.3 inch­es (10.9cm), with­out any pro­tec­tion from the sun’s rays (for exam­ple, a visor), because of this, it is extreme­ly dif­fi­cult to see any­thing on the dis­play in sun­ny weath­er. The pic­ture qual­i­ty is below aver­age, but can be improved by adjust­ing the con­trast and bright­ness. There is an RP-SMA con­nec­tor for con­nect­ing 5.8GHz anten­nas. And a lit­tle to the left of the con­nec­tor is a tiny but­ton designed to switch between 9 boscam fre­quen­cies (by default it is set to 5945 MHz, the eighth fre­quen­cy in a row).

Conclusion

Chit­wan QW350‑2

Func­tion­al­i­ty

9/10

Flight time

8/10

flight qual­i­ties

9/10

com­pact­ness

5/10

Equip­ment

5/10

Reli­a­bil­i­ty

8/10

Price qual­i­ty

10/10

pros

• Build qual­i­ty
• brush­less motors
• dynam­ic
• Good receiv­er oper­at­ing at 433 MHz
• Pow­er­ful bat­ter­ies in the remote con­trol
• DVR in FPV mon­i­tor
• fpv cam­era
• Price

Minuses

• No PC cable includ­ed
• Capri­cious in man­age­ment (does not for­give mis­takes)
• No HD cam­era includ­ed
• The built-in recorder is bug­gy (record­ing may sud­den­ly stop)

Pret­ty good FPV cam­era, excel­lent radio range, thanks for that 433MHz. Before start­ing dynam­ic flights, it is bet­ter to start with tri­al short sor­ties to get used to the con­trols. QW350‑2 is very “capri­cious” in man­age­ment, you have to get used to it. We can say that QW350‑2 is a prac­ti­cal gold­en mean between price and qual­i­ty. Suit­able only for pilots who have expe­ri­ence fly­ing UAVs from this niche.

A photo

Pho­to with QW350‑2 quad­copter.

Video

Video with QW350‑2 quad­copter.

https://www.youtube.com/watch?v=ylUFyWajNGg