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UDI RC U839 2.4G 3D Nano RC Quadcopter GREEN

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Brand	UDI RC
Material	ABS, Plastic
Are Batteries Included	Yes
Maximum Range	30 Meters

About this item

6-Axis gyro quadcopter
2.4 technology adopted for anti-interference, fly multiple quadcopters simultaneously
Four LED lights guide direction at night and can increase the visual perception of flight

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Product information

Product Dimensions

3.51 x 3.51 x 1.15 inches

Item Weight

4.8 ounces

ASIN

B00M0F04EK

Item model number

U839 G

Manufacturer recommended age

14 years and up

Best Sellers Rank

#401,896 in Toys & Games (See Top 100 in Toys & Games)
#35,207 in Hobbies

Customer Reviews

315 ratings

3.8 out of 5 stars

Is Discontinued By Manufacturer

Manufacturer

UDI RC

Date First Available

July 22, 2014

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Product description

Features Nano-miniature (3.5", 36g) remote control flying drone with 4 safety-protected propellers Fun-sized 4-channel 2.4GHz controller is ready to fly (RTF) out of the box Performs flips and 360˚ rolls in any direction by clicking then pushing the right stick High-speed mode for outdoor racing 6-Axis Gyro for precise flight control (3 gyros and 3 accelerometers) Modular design is built from impact-resistant ABS plastic - parts are easily maintained and replaced Recharge the battery with USB - lasts 5-7 minutes per flight 4 LED light strips lets you fly in the dark Ages 14+ Black and Green finish Included: RC Quadcopter Controller 2 Batteries (one for copter, one for controller) USB Battery Charging Cable Spare parts: 4 blades & 1 prop remover tool Instruction Manual Name of Product: Nano 3D Quadcopter Model: U839 Size: 8.9*8.9*2.9cm Weight: 36g Controller: 4-CH, 2.4GHz Control distance: Over 30 meters Battery for controller: Li-Po 3.7V 150mAh Battery for copter: Li-Po 3.7V 150mAh Charger for batteries: USB (cable included) Charging time: 40 minutes Flight time: 5-7 minutes Motors: 7mm coreless.

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Customer reviews

5 star		50%
4 star		15%
3 star		12%
2 star		9%
1 star		15%

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Top reviews from the United States

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Someone

Far exceeded expectations, best Nano Quad!

Reviewed in the United States on January 18, 2015

Verified Purchase

I have much experience with the Estes Proto X and Ethos PQ nano quads and the larger UDI U818. After doing some research decided to try out the UDI U839 and I'm seriously impressed! When researching this quad one recurring complaint was the slow yaw rate but I must say these complaints were made by individuals who did not know about the 3 power settings. On the first setting the yaw rate IS incredibly slow but on setting 2 and 3 this thing is insanely quick and responsive! Setting 3 is actually TOO fast for the tiny controller!
Another great thing about this quad is the body design. Unlike the Proto X and various clones the body is not just an extention of the circuit board (which often leads to premature motor failure). It is very sturdy and well designed and built. The battery compartment was made for ease of battery swapping unlike most other nanos. The U839 also has a little bigger motors than most nanos and the power difference is very noticible. One thing to note is that the battery polarity is the opposite of most other nano quads, You can use your batteries from others but will need to plug them in the opposite way. This nano quad outperforms all others I have used and being in the same price range as other nanos this one is the best by far! Don't hesitate to check it out!

20 people found this helpful

Helpful

Daniel Diaz

Good first quadcopter for a drone newbie, but I got a dud

Reviewed in the United States on December 29, 2015

Verified Purchase

For $20, is pretty good, but not great in general. I like how it has the ability to do flips and has a prop guard that works good enough. I was a bit surprised at how small the controller was. Did not last very long though, I had done a couple crash landings on grass from a few feet... which was nothing that could damage this, apart from maybe getting some dead grass on it. Anyway, it was my third time flying it and I was still learning how to control it well until it just went crazy and pulled hard to one side, almost crashing into a wall at a high speed. I killed the throttle and let it drop to the grass to see what had happened. Battery was not dead on neither the controller or quadcopter itself. Propellers were fine and not bent or broken. Gave it a little bit of throttle and all but one propeller functioned. One motor must had died mid-flight or a cable broke or something, all I know is one motor will not spin anymore, rendering the whole quadcopter useless to try to fly.

Battery takes about 25 minutes to charge from a 2.1 Amp USB charging port, but will take longer from a low amp port from something like a computer, some wall adapters, standard car USB ports. Battery lasts probably 7 minutes total, but if you keep having to get the quadcopter and relaunch, you can get maybe 15 minutes or more with it. Battery in the controller lasts a few flights. The two batteries are the same, one for the quad and another for the controller. Both removable and you have to charge one at a time unless you buy a special charging hub. I suggest you buy more batteries and a hub, like the one I linked below.
http://www.gearbest.com/rc-quadcopter-parts/pp_186502.html?wid=2
Comes with two extra green and two extra black propellers and a tool to remove them. A manual is also included. Nothing else.

My verdict:
If you are on the fence, get this. I was just unlucky and got a bad item, but the quad itself is pretty good for how cheap it is. This is one of the few $20 quadcopter/drones that has a full propeller guard and does flips in any direction. I would say this is the best out of those few. This is something great for children, as your first quadcopter, or just to entertain yourself with. If you are more experienced, get something better like a Syma X5C-1 for $50, which is what I am getting after I return this. Do not eve think about attaching anything else to this, like a gopro camera, it is way too weak to carry anything, but it is quite powerful for itself.

I've included several pictures showing the items included, how one propeller does not spin while the others do, and showing how the wires are still soldered onto the mainboard.

8 people found this helpful

Helpful

smccllm

It was ok, but broke quick

Reviewed in the United States on April 23, 2016

Verified Purchase

Ok, I have a love/hate relationship with this thing. Firstly, the instructions are hilariously hard to understand, but I was able to wade through it all. It said something about having to calibrate it yet the instructions didn't explain well how to do this. Any time you want to charge this thing you have to fuss with this little battery wrapped in plastic with a very flimsy connector on it. I was so afraid we would break it. We also bought this around the same time some chinese "hover boards" were starting fires and decided to take extra precautions to not over charge the battery as we could not tell if the battery was protected or not. The battery life was pretty good. The remote only died once in the lifetime of this toy. If the copter touches the ground stop the blades immediately because even a tiny little cat hair will jam them up. After just a few weeks and maybe 12 charges into it, one of the motors completely died and the copter refused to fly with just 3 of them running. I threw it away. For the price, this thing sure can fly. But I don't feel we got enough life out of it before it was no longer usable. Other than that, it sure looks good, it came with extra blades and a special tool to remove blades for changing or cleaning. Once you get the hang of it, it's not too hard to control. There is an odd function on it, my son kept pressing the up and down buttons on the remote which just makes an annoying beeping noise, but doesn't appear to do anything on the copter (and the instructions really didn't clarify).

Helpful

Matthew

Fun Fast and Fragile.

Reviewed in the United States on January 9, 2016

Verified Purchase

This thing is fun, really fun. Like most of the multirotors in its class it has three flight modes slow (way too slow), medium (just right) and fast (way too fast). I only really flew it on medium as it is the most viable option, the fast mode tends to over pitch and the gyro can't keep up then it flips and crashes.

The charge time is about 20 minutes and the flight time around 5 minutes which isn't bad. The battery is removable so if you have other 1s lipos lying around with the same connector you can use them for this. I used my Estes proto X battery to power the transmitter which freed up an extra lipo for the craft. Not bad!

I got many many flights out of this thing which bodes well for the quality of the electronics. Unfortunately, I crashed it once. Just once on the cement walkway by the pool and bye bye multirotor. It flies, but it's not the same. The gyros off the motors sometimes won't start, It's a mess.

So in summary this is fun fast but fragile and is best used by a more experienced multirotor pilot. That or someone who has a lot of grass in their yard.

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UDI RC U839 2.4G 3D Nano RC Quadcopter GREEN

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