Hubsan X4 PRO Review H109S Parachute

Finally the Hubsan H109S X4 PRO quadcopter to be officially released, maybe?   We originally filmed the micro Hubsan x4 H107D that reached 350,000 views youtube very quickly back in 2013, so today I am back to take the X4 Pro for a DroneMission flight, at the same time provide some feedback on the new and improved X4 Pro.   Since 2014 Hubsan has been talking about the x4 Pro H109S; along the way there were pre-releases, testing, and more testing.  Two drone years in the making, will it live up to the reputation?   The challenge is in 2 years, a lot can and have changed and Hubsan found themselves in the midst of an evolving technology, outdating applications and a price war in this industry.


To differentiate this pro quadcopter from it’s competitors, Hubsan included a Parachute System; when bumped in a collision, the parachute will automatically deploy to prevent the X4 Pro from crashing.  Unlike other systems, the Hubsan parachute can be removed or assembled freely and be reused many times.  When the canister tilt past 80 degrees, the sensor unlock the lid, and the spring pops the parachute out.

► Where to Buy FIND


Flight time: around 30 mins Battery: 11.1V 5300 mAh Lipo battery
ESC: 30A Transmitter: FPV version
Frequency: 2.4GHz/ 5.8GHz Video Distance: 300-2000meters
Motor to Motor distance: 260mm


In addition, to differentiate this pro quadcopter from it’s competitors, Hubsan seem to have done things differently to confuse users like me.

This x4 Pro does not seem to followed some RC conventionals.

The propellers and motors are reversed, the switches are reversed.  On the positive side, I can see some lessons learned and best practices have been introduced into the x4 Pro design, in an attempt to avoid some of the known failures suffered by other competitors over the two years.

The core features of the x4 Pro are: accurate automatic return to launch point, a 1080p 30 fps HD camera, a smartly designed radio transmitter with telemetry, nice FPV ready 5.8 GHz build-in video transmitter, GPS location tracker for position hold, One Key Take Off, headlock mode and auto landing.



The ergonomic design of the Hubsan radio transmitter is what first attracted me to the X4 Pro H109s and the Spyhawk GPS plane.  I like the wider width radio transmitter with a monitor in the middle, seemed like the perfect width aligning with my arms, compared to a narrower width Devo F12e (of course the Devo f12e street value doubles when you deviate it!).  Aside from the switches being nonconforming and an incomplete TF card slot, the standard radio included works well, the LCD monitor is informative and the gimbal dials are reachable while you fly (whereas the xk x380-500 radio transmitter has an impractical dial for a mode 2 pilot).  The telemetry on the screen is not recordable without the dvr, but it does show voltage, home direction, gps counts with alarm.   On Screen Display (osd) would have been a better choice, in that way data can be recorded over video on an external dvr, such as a goggle.

I have not seen any instructions on how to program this radio and was hoping to share this radio with other aircrafts. The 8 AA battery bay can be tight for a LiPo and probably not a favorite for some diehard hobbyists, but it works very well with the Panasonic Eneloop Pro AA 2550mAh 1.2V Low Self Discharge Nickel Metal Hydride (NiMH) Rechargeable Batteries (if you have not tried them, they last a century).


Living blog.  Be back shortly.  source:

Flight Notes (April 2016):

  • Maiden flight good, no issues, it flys as expected.   RTH 3 feet to launch point.!  RTH ascends to 30 meters first and returns with the tail facing, only if the preference can be changed (ref. XK, Walkera can be changed with PC software).  I am not able to yaw around the X4 Pro during return home unless I disengage the mode.
  • arming begins motor idling.  ok practice, visibilty is safer than a silent arm.
  • does not auto shut off upon landing, disarm idling motors to avoid toppling over.
  • Propellers original Phantom 3 Spare Part No 9 self tightening fits perfectly
  • Telemetry Home Direction H=0 degrees is heading home.
  • looks easy to use your own gimbal.  Both standard JR servo connectors easily accessible for a 2-3 axis gimbal.
  • Transmitter needs to bind during unbox, before anything will work, including the gimbal. Power on the X4 first, power on the transmitter and Press ENTER button within a second, or follow the manual to power TX first, than power the x4, whichever works for you.
  • X4 main battery bay is narrow
  • Unable to find the documentation of the OSD or LED  colour status
  • You can still view without a TF/SD card installed on the camera.
  • TF card slot present but holder is missing on radio transmitter (i guess design was canned)
  • Calibration similar to the xk, as for x4 rotating red LED for horizontal calibration, rotating green LED for vertical calibration, solid LED when done, followed by a beep.  Calibrate 1 or 2 also appears on screen, but it can be hard to see the screen while rotating at the same time.
  • Requires calibration on every flight
  • Radio transmitter alerts beeps every second when GPS is lost. Great feature.  Received 12 satellites today.
  • Notice motors and props reversed
  • noted switch reversed
  • throttle stick returns to center (dji), which meant I can’t use the radio for the Hubsan plane or other quadcopters.

► A Project

► Lesson of the Day:  LiPo – how to use and care

Panasonic Eneloop Pro AA 2550mAh 1.2V Low Self Discharge Nickel Metal Hydride (NiMH) Rechargeable Batteries


Eachine Goggles One HD 1080p FPV Video Glasses

Eachine Goggle One is a 5 inches 5.8G 40 channel Raceband HD 1080p HDMI FPV goggle and home theater video glass.  An upgrade to the VR-007 goggle released recently.   With a HDMI port, this will allow you to view HD FPV real-time video, complementing supported WIFI multirotors, such as the Solo by 3DR, DJI Inspire and other compatible HD quadcopters. We will put it to a test and report back next month.


► Where to Buy: FIND
Brand name: Eachine
Item name: Goggles One FPV Goggles
Frequency: 5.8G 40CH (Raceband)
Highest resolution: 1920*1080
Input voltage: 7-13V
Screen size: 5 Inches
Perspective: 78 degrees
Languages: English, German, Japanese, French and other languages selection
Weight: 320g(without battery)
Supply voltage: 7-8.4V
Audio: Built-in audio output for connecting headphones
Support: 5.8G Analog Input/HDMI Input
Support: brightness, contrast adjustment
Operating temperature: -20℃-80℃
Dimensions: 25x20x19(cm)

                                                                               Frequency Table
Frequency Band A 5865 5845 5825 5805 5785 5765 5745 5725
Frequency Band B 5733 5752 5711 5790 5809 5828 5847 5866
Frequency Band E 5705 5685 5665 5645 5885 5905 5925 5945
Frequency Band F 5740 5760 5780 5800 5820 5840 5860 5880
Frequency Band R 5658 5695 5732 5769 5806 5843 5880 5917


Comparison Chart

 Eachine Goggles One  Eachine EV 800  Walkera Goggle4 Basic
 Kylin Vision
Max resolution  1920*1080  800*480  800*480  800*600
Screen  5 inch  5 inch  5 inch  5 inch
Channels  40  40  40  32
Highlight  Cooling fan  2-in-1 goggle & monitor Comfort,  Diversity

Living Blog.  Be back shortly. source:

A Project




GTeng T901F Quadcopter

GTeng T901F is an unusual symmetrically spider-looking 16.5 cm outdoor quadcopter with a camera broadcasting at 5.8G frequency images transmission to your radio transmitter receiving monitor to view your flying. At 5.8gHz that would mean you can use your personal FPV goggle or any compatible external video receiver. The radio transmitter itself uses 2.4GHz to extend the range for outdoor flying and is powered by a 3.7V 500mA LiPo battery. Yes, you read it right, you get two chargers and two 3.7V 500mA LiPo battery out of the box, the second battery is to power the flying spider. The T901F carries a 6 axis gyro to ensure the stability and performance, allowing you to toss the quadcopter in the air and regain instant leveling.

I can picture the GTeng T901F in a Sharper Image, nicely package, a mini quadcopter with copper trims around the body, ready to fly, out of the box. Everything is pre-assembled, weighing just 67 grams, legally within the limits before registration is required in the USA.

The 2 mega pixel camera captures and records video upto 300 meters (our tests under 70 meters) in real-time transmission while you view it from the radio. T901F comes with the popular headless mode, basic one key automatic return function without GPS and 360 degree flip functions.


Find Where To Buy

Factory Specifications:
Brand: GTeng
Item No.: T901F
Copter Size: 16.5 x 16.5 x 4cm
Charging Time: About 70min
Charging Way: USB Charging
Playing Time: 6 – 8min
Frequency: 2.4GHz
Gyro: Built-in 6 Axis Gyro
Camera Pixel: 2-mega-pixel
Control Distance: About 150m
FPV Distance: About 300m
USB Cable Length: About 60cm
Copter Battery: 3.7V 500mA LiPo Built-in Battery
Radio Transmitter Battery: 3.7V 500mA LiPo Built-in Battery
Summary of Functions: Turn Left / Right, Forward / Backward, Up / Down, Left / Right Sideward Flight, Headless Mode, Rollover, One Key Automatic Return, Film and Shoot, with Light, Speed Switch and Video Monitor.

First impression, this quadcopter is easy to fly, stable, it does some nice turns. It can handle about 3 mph wind outdoors but not much more, as it struggles against the wind. There don’t seem to be a higher rate mode from our tests to allow us to fly in high winds. Not recommended for beginners to fly in the wind, as it will get tossed around easily. It is small enough to fly indoors and comes pre-installed with protective guards.

The symmetrically design evenly distributes the weight and makes it very well balanced and easy to control. I had some reservation about 1s LiPo on a radio transmitter at first, but than if you are into RC, these 1 cell LiPo battery are affordable and easily available.

The image on the LCD screen is sharp and crisp but can be reflective under the sun. The recording is done at the quadcopter itself. Distance of the video is limited, we begin to lose video signal around 100 ft or 30m. A 4 gb micro TF/SD card is included. The camera seem to be tilted downwards, which is fine if you are flying slow and level. The camera is not adjustable unless you modify it and bend it upwards. No auto light balance as shown on the photo below.

Overall T901F Flying Spider does what it is described on the specification. An affordable toy-grade quadcopter that is easy to fly, no assembling required, ready to fly. It struggles to fly against light wind conditions. In terms of ranking the T901F, I would it say it is in the lower half of what’s new in the market. (Picks You can get a bigger quadcopter for about the same price, but than big does not always mean better. If you plan to fly indoors, this will be perfect, but may be small too fly beyond 300 feet.

What To Expect If This Your First
You can easily spend 15 minutes on each flight, setting up and flying. The actual flight may last 7-8 minutes. On a Mode 2 radio transmitter, throttle stick is on the left.

Connect your battery to your quacopter and lay it flat on a hard surface immediately. This will allow the quadcopter to self-level the gyroscope. Power on your radio and move your left throttle stick up and down once to bind the receiver. The quadcopter is now live, any movement on your left stick will spin the propellers. You can close the battery door after the bind and self-leveling.

The T901F LiPo battery may get a little hot after each flight. When the voltage is low, the quadcopter will begin to descent to prevent the battery from over-discharging. Over-discharging a LiPo battery below 3 volts per cell, can permanently damage the battery. It is best to let the LiPo cool down before the next charge.

With a 6-axis gyro flight controller, you can toss your quadcopter in the air and throttle up in full to self-level.  Lower your throttle stick to about half once you regain control. You will than need to yaw around to identify the front or back, to regain your orientation.  If it helps, mark the back with red tape to make it more visible.

Keep an eye out, the propellers easily flies off after a few hard landing, but you can just easily plug them back. The quadcopter is made to take some good beating, and does not get damage easily, especially when you fly in a field.

To complete an auto flip, fly to about 10 feet and push the right stick inwards on your radio, you will a click and move the stick in the direction you want it to flip. It will auto flip.

If you lose radio signal, the quadcopter LED lights will flash constantly.

Don’t expect to be able to fly with the camera in first person view, as the camera lens view is rather narrow, you may see a lot of ground unless you fly much higher.  Remember to stop your video recording, before you power off or your video file may become unusable.

Living Blog.  source:


Contribution by Leo CTO of, a member of the Linux Foundation and board member Kinglea UAV and Walkera USA.


Navgator X6 Xinlin X181 FPV

The Navgator X6 Xinlin X181 quadcopter was released recently and is hard not to get excited about this model aircraft.  The Navgator X6 can fly, in fact very swift and aerobatic!   Xinlin Shiye is not new in the radio control scene, Best Buy and Sears were among their major buyers, during the explosive 2015 drone sales.

To differentiate from other quadcopters, Xinlin Shiye included a radio transmitter with LCD.   The highlights to this model, are the  5.8G FPV 2MP 720P camera and a 5 inch LCD video/DVR receiver screen that provides real-time video viewing and photo capturing.


I absolutely love how this Navgator x6 flies, compared to my other 20-25cm quadcopters.  The motors and battery gets hot during a 7 minutes flights, but not a concern, powerful enough to flip and take some nice turns.

The forward flips are tight and swift at full acceleration.

Find Where To Buy



Color: Black, White
Frequency: 2.4GHz + 5.8GHz (Video transmission)

Transmitter: 2.4GHz 4 channels vs 5 Inch LCD
Gyro: 6 axis
Flight time: around 7 minutes
Charging time: about 150 minutes
Remote Control Distance: About 100 meters
Battery For Quadcopter: 7.4V 1300mAh lipo Battery
Battery For Transmiter: 6 x 1.5V AA Batteries

Maximum memory expansion: 16GB

Function: FPV / ascend / descend / forward / backward / side flying / low/high speed / 360°rolling action / hover / 3D / LED / video recording / sound recording / picture shooting / 5.8G transmission / CF mode / One keyreturn



The Navgator looks very similar to a Walkera Scout X4, just in terms of look and at half the size, without GPS.


The radio transmitter is very comprehensive and impressive.  Besides including a LCD video monitor, you can actually hear your flight from the speakers.  The DVR allows you to record your flight at the radio, so you can playback and find your lost quadcopter.  The speed rate and one key flip buttons are on the top right corner.  You can turn the lights on and off on the left button.  Start and Stop recording and take a photo.  Lower or pump up the volume.


To sum up my experience with this quadcopter.  Among the best 25 cm quadcopter, fast, stable and aerobatic copter.   The LiPo uses two male pin 3.5mm banana plug which is not so popular.  The LiPo bay also limits you to the size and choice of batteries.  Other than that, the Navgator is very well made for the mini quadcopter category, it is tough and handles it’s weight well.  The radio range has it’s limit of 100m, but just about acceptable in this category, 300m would have better for the intended FPV use.   The camera is below par but quite expected, as it is recorded over the air and not in HD.   The features  on the radio are above and beyond it’s competitors.


A Project


BitEye designed a camera with the purpose of using it for FPV, 1080p 30FPS Full HD video recording and simultaneously analog video output, with a latency of under 60ms for better handling in FPV flying, powered by TI DM368 Texas Instruments.

In addition, another  key requirement for FPV flying, a quick auto-exposure, self-adaptation for ambient light changes and low lux for night flying. Inter-changeable optional lenses for pilot preferences and quick repairs.

What’s more, add 19 grams to your aircraft, unexpected power-off will not damage video files. A wide input voltage range from 5V to 15V, to power it on and start recording, just 1 step, no buttons.


Factory Specifications

  • Camera size: 32*32*35mm
  • Vibration absorber size: 60*33*17mm
  • Overall weight: 25g (19g + 6g optional anti-vibration frame or  case)
  • Input: 5 – 15V, 1A
  • Field of view: 155°
  • Focal length: 1m
  • Video resolution: 1080p (1,920×1,080)
  • Video format: FLV
  • Supports microSD card up to 32G, use class 10 card or faster for the best experience.

interfaces of FF-A00T3.jpg


1. Mobius CVBS output: 226 – 069, 157ms.
2. GoPro HDMI output: 396 – 302, 94ms.
3. BitEye CVBS output: 267 – 207, 60ms.

installation of FF-A00T3.jpg

We intent to take it for a field test in the coming weeks and will report back on the results.

This Is What We Like About It

So many times you power off your aircraft first and you end up with a corrupted video file, Biteye addresses this issue by creating FLV flash binary file format that stream “bitmapped” video.

Living Blog.  Be back shortly. source:

► A Project


Syma X5HW WIFI FPV Quadcopter

X5HW made by Syma introduces the next generation of budget mini quadcopters with barometer sensors for Altitude Hold.  Pressure sensors are not new to the quadcopter drones scene but not many mini copters carry them.


A GeekBuying Pick ► Find Where To Buy


First impression, this quadcopter is a great beginner’s budget quadcopter.  Number 1, dual arming protocol prevents a newbie from accidentally bumping the throttle and spinning up the blades.  Number 2, two gear speed, Low (L) rates from indoors flights and High (H) rates for outdoors and windy conditions. Number 3, when the quadcopter encounters a direct impact or is struck on the propellers, the motors will shut off.  Number 4, and best of all, it holds the altitude while the pilot focuses on forward flying.

The Syma X5HW is easy to fly, stable, it does some nice bank turns. It can handle moderate amount of wind outdoors. It is small enough to fly indoors and comes with protective guards.  The Android FPV WiFi app for Syma FPV connects instantly, photos and videos are viewable within the app.

The range is limited to 50 meters and do suffers from some intermittent lost of control

One more things to test: Range, will report back on the video quality

Target Audience
Beginners, Off the shelves, Ready To Fly, Safety First, Park Flyer, Budget $60 (2016)

What To Expect If This Your First
You can easily spend 11 minutes on each flight, setting up and flying. The actual flight may last 5-7 minutes. On a Mode 2 radio transmitter, throttle stick is on the left.

Connect your battery to your quadcopter, close battery door and power on, lay the quadcopter flat on a hard surface immediately. This will allow the quadcopter to self-level the gyroscope. Power on your radio and move your left thottle stick up and down once to bind the receiver. When you are ready to fly, hold both sticks inwards to arm the motors, the propellers will begin to rotate slowly.  The quadcopter is now live and has entered into flight preparation mode.  To stop the motors, hold the left stick to the lowest point for 3 seconds.

The quadcopter LiPo battery may get a little warm after each flight. When the voltage is low, the quadcopter four lights will begin to blink and will begin to descent to prevent the battery from over-discharging. Over-discharging a LiPo battery below 3 volts per cell, can permanently damage the battery. It is best to let the LiPo cool down before the next charge.

You must set the speed to High (H) rates for outdoors.

With a 6-axis gyro flight controller, you can toss your quadcopter in the air and throttle up in full to self-level.  Lower your throttle stick to about half once you regain control to hold the altitude. You will than need to yaw around to identify the front or back, to regain your orientation.  If it helps, mark the back with red tape to make it more visible.

To complete an auto flip, fly to about 10 feet and press the top right button, and move the stick in the direction you want it to flip. It will auto flip!

If you lose radio signal, the quadcopter will drop, it would have been better if it descend slowly.   Not by design, but as a last option, just power off, in an emergency if nothing else stops.

Don’t expect to be able to fly with the camera in first person view, as the camera lens view is rather narrow.  The video also freezes when there is poor WIFI reception.

You may not be able to view the video recorded within your tablet if your equipment does not support 3GP playbacks.  Video files are saved in 3GP format. 3GP is a video format specially developed for third generation mobile devices. You can view the video within the Syma App if your Gallery does not support 3GP or upload to goggle drive and view it there or use some other software.


Factory Specifications:
Color: White, Blue
Frequency : 2.4G
Channel : 4CH
Gyro:6 Axis
HD Camera:Photos(2MEGA), Video(1MEGA)
Battery for Quadcopter: 3.7V 600mAh Li-poly
Transmitter Battery: 4 x AA battery
Charging Time : About 90 mins (USB charging)
Flying time : About 5~7 minutes
Charging time:About 130 minutes
Controlling distance:About 30-50 meters
Product size:33*33*11cm
Box Size:41.5*34*9.5cm

The propellers tend to break around the screw into half, as on impact the stress is placed on the screw on the shaft.  Replacing the propellers are easy, but a handy screw driver is needed.


  • WIFI FPV with 2.0MP HD camera.
  • With Altitude Hold mode, setting height.
  • Headless mode,  360 roll.
  • 6-Axis gyro flight, for stability, stronger wind resistance and easier control.
  • The quadcopter can fly both indoor and outdoor using 4 channels digital proportional RC system, 2.4 gHz
  • Functions: up/down,left/right sideward fight,forward/backward,turn left/right,with gyro/flash lights,A 360-degree 3D and special functions (continuous rolling)



► A Project

Conclusion, this quad flies without doubt.  If you are a beginner who wants to learn to fly, we will recommend the Syma X5HW over any other quadcopters for the four reasons stated above.  It is a nice looking quadcopter, however if you looking to video or to fly FPV (first person view), this quadcopter will not give you the full experience or capability to do so well.  Unfortunately glitches on the signal and range limitation puts this quadcopter prone to fly away, but for $60 you can weigh in if those limitation matters to you.

In terms of ranking, I would say it is in the mid half of what’s new in the market April 2016  ($61), but not on the top 3 because of the tablet app and the signal glitches. (Current Picks


Living Blog.  source:

Contribution by the Usability Test Team, a member of the Linux Foundation and board member Walkera USA.


Kaideng K70C Sky Warrior Quadcopter

KAIDENG K70C Sky Warrior Quadcopter. Kaideng a toy RC car and heli manufacturer is joining the quadcopter arena, entering the market place with a retractable camera holder on a sporty quadcopter.


It comes with 6 axis gyro chip, providing the stability and the ability to toss the quadcopter in the air and regain instant flight.  With a 2.4GHz radio control frequency, this ensures better outdoor performance and longer distance within line of sight.

The Sky Warrior is equipped with LED lights, making it more dazzling and colorful for night flying.


Headless mode assist the pilot in returning home when orientation is lost.  Headless is relative to where you stand, and regardless of where the Sky Warrior is facing, a pilot can just pull back the sticks and return home.

► Where To Buy
• Flash deals:

This model has the 360 degrees / 3D rollover which allows a beginner pilot to flip the quadcopter easily.

The HD Camera included is a 2MP camera. It allows you to take photos and videos.  We put it to a test and the footages can be seen on the video above.  First impression, we don’t see any practical use of the retracting camera holder as it does not really protect a camera from rough landing, neither does it function as a gimbal.  However, after flying the Sky Warrior and experiencing what it does, we can say that the retractable holder can be used as a means to point the camera at an angle where you want your video or photo to face.  We like that you can remotely start recording and stop recording.  The Camera at 720p is nothing compared to a Keychain #16, the quality is not that great.  The stock camera can be replaced with a different camera, such as a GoPro or Git2.

Copter Size: 55.7 x 53.8 x 17.5 cm
Charging Time: About 300mins
Charging Way: USB Charging
Flying Time: About 9 – 10mins
Frequency: 2.4GHz
Gyro: Built-in 6 Axis Gyro
Camera: 2-mega-pixel
Control Distance: About 100m
Copter Battery: 7.4V 2000 mAh Lipo Built-in Battery
Control Battery: 4 x 1.5V AA Battery
Summary of Functions: Headless Mode, Rollover, Hover, One Key Automatic Return, Light, Camera

Target Audience
Keen Beginners, Park Flyers, Almost Ready To Fly (DIY), Budget around USD $85

What To Expect If This Your First
You can easily spend 15 minutes on each flight, setting up and flying. The actual flight may last 9-10 minutes. On a Mode 2 radio transmitter, throttle stick is on the left.

The Sky Warrior uses a 2s LiPo with 3.5mm banana plug, however it has two male pins, unusual, instead of standard banana plug.

The propeller installation would have been very easy if they were well documented and if the diagrams were more specific.   The propellers are lock into place with an intricate system of iron pins and lockstitch as shown at the second half of the video.  Here are the steps.  Insert the correct propeller into the pipe, place the washer in, add the transparent looking lockstitch with the notch on top, rotate it to align the notch to the pin hole.  Insert the iron pin.  Rotate the lockstitch inside 90 degrees clockwise until you hear a click that locks the pin.  Cover the propeller with a prop nut.  A lot of fuss, but still a genious engineering piece of work.

The propellers are labeled A and B, but KD had forgotten to show them on their  user manual diagrams.  We updated their diagram below here.  For a typical quadcopter, counter-rotating propellers are used. The blades angle bends high against the air flow and flow low outwards, giving that lift.  So you have to determine which way it spins.  Spinning clockwise front left and rear right.  Anti-clockwise on the other 2 props.  So in this case, the A are placed on the front left and rear right. B on the front right, and rear left.  Placing the propeller reverse, the trust will be down, so your quad will not take-off no matter how much you throttle up.


The Sky Warrior is easy to fly and flies well even with the camera.  It does a nice turn at a constant speed.  However we notice it loses altitude quickly when you throttle down and is slow to recover, that can be due to the extra weight when flying with a camera.

If you thinking of buying a small 50 cm quadcopter without GPS around the price of $80, there are quite a few choices in the market and we can say this will fall among those recommended.  It is light, so it does not break on a hard landing.  The only concern we have is we can either buy more of the same battery or have to change the power connector.


► A Project

► Lesson of the Day:  LiPo – how to use and care

Syma X51 Spaceship Quadcopter

Syma X51 Spaceship Quadcopter is a unique quadcopter design, looking like a USS Enterprise.  At first glance you may think it is a tricopter,  but taking a closer look, it is a quadcopter with a pair of counter-rotating propellers at one end, stack above each other in a spheroid cage.  We will take it for a test and report on it next week.

  • Automatic Cruise – When you activate the automatic cruise feature, the quadcopter will cruise automatically according to the preset trajectory
  • 360° Eversion – One key 360°roll in 3 ways (Backward, Left & Right), continuous roll for perfect action and wonderful performance.
  • 6 AXIS GYRO – The latest 6-axis flight control system is easier than ever to control, with stronger wind resistance, and greater stability.
  • LED Lights – Now fly your quad at night, and easily keep track of your quad with the attractive colorful light display.

► Find Where To Buy


► Flight Review

It flys like a USS Enterprise, I mean the front of the aircraft is the spheroid cage with the stack propellers.

There is nothing to assemble, it is truly ready-to-fly.  Very stable in flight for a unique design.  The pair of counter-rotating props allows the quadcopter to yaw around quickly but banking on a turn is not at all pretty.   The 6-axis flight control system allows you to toss the X51 in the air and stabilize in flight.  We flew it indoors and outdoors.  We manage to fly the X51 against 10 mph wind gust, even though you may find the X51 occasionally gets pivot around, as it is counting on the pair of  hind rotors to keep it on track and will pivot around the spheroid rotors with a gust of wind.  Every aircraft we have flown has it’s unique characteristic, after two flights we begin to maneuver around with yaw stick.  So if you are not big on your rudder stick, you will soon adapt to it.

The propeller guards and cage protects the propellers very well.  You get a spare set of propellers and a spare battery.  The battery fits snugly in a battery bay, the door may seem tight at first, but once you know where the tabs are, it is easy to open and close.  Love the design, the super micro LED lights up nicely.

If you are a big Syma fan, which we are, this is a great addition to the collection, in fact almost a must have.  It is not exactly a beginner quadcopter, as it does not fly like one. However, since it is small enough to fly indoors, it is easy when it is calm without any wind; giving you the opportunity to hover around, like flying a micro helicopter, except with 4 channels!

Frequency: 2.4GHz
Channel: 4CH
Battery: 3.7V 380mAh Li-Po battery with auto cut off safety PCB
Flight time: up to 6 minutes
Charging time: 40~50 minutes
Control distance: up to 30 meters
Product Size: 6.7 x 5.7 x 2.9 inches
Product weight: 0.1 lbs
Package size: 7.5 x 12.4 x 2.95 inches
Package weight: 1.1 lbs

A Project

► Lesson of the Day:  LiPo – how to use and care

Eachine Assassin 180 VR-007 HD Goggles I6 Transmitter

The scorpion looking racing quadcopter has arrived with built-in OSD GPS NAZE32 Ready To Fly.  Eachine Assassin 180 FPV, VR-007 HD Goggles with the I6 transmitter.

The 180 racing quadcopter flew really well, it handled a RunCam HD camera 43 grams with ease.  I have not found any issues, no bad flight characteristics. On a Naze 32 flight controller, it was easy to maneuver and I give it a thumbs up.

If you have flown quadcopters manually, this is easy.   For beginners, please note, it is not a drone, it is not going to auto land or auto return home.

Unboxing, I noticed the GPS is glued under the tail plate and actually fell off. Taking a look at the schematics, it seem to be intended to be on the front. However since I may be placing a secondary camera just above that spot, I decided to move it face up, keeping the same location it came with. I think it fits well there. You can see it on my FPV video. The GPS does not serves much, it is not intended for Auto Return Home, but just only to assist with directions.

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The landing skid is made of plastic, so it bounces off concrete, I had to land on grass only, unless you add some padding, which is an easy mod for a hobbyist.

It comes with a tiltable low lux 520TV Lines camera, capable of night flying with some street lights

The only set back on this Ready to Fly package  will probably lies on the battery design. The general consensus is; not only is the battery proprietary, you are not able to tell if all the cells are fully charged, and the adapter indicator is not accurate at all.  Lessons learned, when the adapter LED turns solid green, you may not get a fully charged battery.  It reminds me of mine Nintendo Wii charging station. it never fully charges.

The only easy way to tell if the main battery is fully charged is to either press the smart battery button or to look at your On Screen Display voltage status. However on the plus side, when the battery is low, not only does it show on the OSD as a warning, but it shows on my transmitter and the alarm eventually begins to sound.  The 180 quickly descends and will not power up again to protect the battery. Note that it does descend, hard landing and not return home.

VR-007 goggle.  I like it.

It is comfortable and light, and if you are planning on building one yourself, for $60 plus dollars, this might be worth the consideration to just buy it ready. I have not tested the 40 channels, but if it is accurate, this will include the alpha, beta and race channels.

I like the two usb smart batteries provided.  I believe they will work on other goggles, so if they are priced well, this may become popular.

Products Description Features
Eachine Assassin 180

Size(mm): 128x180x74

Total Weight: 343g

Camera: 520TVL, supports HD night flight, adjustable camera angle

Brushless motor: 1806-2300KV

ESC: 6A(3S)

Flight controller: Naze 32

Battery: smart battery 3S 1000mAh

Image transmission: 5.8G 600mW 40CH

Propeller: 4 inch

Flight time: 7-9 minutes

Delicate and compact, light and portable.

NAZE 32 flight controller, high stability flying.

Integrated barometer, electronic compass, acceleration sensor, GPS.

Supports Baseflight and Cleanflight.

520TVL, highly integrated, supports HD night flight. Camera angle is adjustable.

Highly integrated camera, recording every moment of flight experience, experience colorful life!

Built-in OSD to display flight altitude, flight speed, course, battery voltage, image transmission frequency.

OSD data will popup a window to remind low battery and the drone will also have flashing taillight and alarm.

Smart battery, 3S 1000mAh, extractable and quick-release design, easy to replace. Using lithium polymer battery, performance security, quick charge, abandon the traditional balance charger.

Eachine VR-007 HD Goggles

Dimension(mm): 148x176x102

Screen size: 4.3 inch

Screen resolution: 480×272

Working temperature: -20℃-80℃

Ultra-lightweight design: 256g(battery not included)

Battery weight: 24g

Power voltage: 800mah 7.4V standard configuration(2S smart lipo battery, with power display function, supports USB 5V charging)

Antenna: 5.8G 3dB

Power dissipation: 500mA

Frequency channel: built-in 40CH 5.8GHz A/V automatic search receiver

Language choice: multilinguals can be choosed in osd menu(English, French, Italian and so on).

Small size, light weight.

Designed according to ergonomic.

Settled three-point fillet can reduce the pressure of long-time wear to the head.

High softness, ventilate and environmental sponge fit the contours of the face, more comfortable, less ambient light.

Customized eyeglass, myopia below 400° needn’t to wear glasses.

Built-in 40CH 5.8GHz A/V automatic search receiver.

Two groups of standard 800mAH 7.4V (2S) Lipo battery, with power display function, supports USB 5V charging, long life.

Eachine I6 2.4G Transmitter

Channels: 6 Channels

RF Range: 2.40-2.48GHz

Bandwidth: 500KHz

Band: 142

RF Power: Less Than 20dBm

Sensitivity: 1024

Low Voltage Warning: less than 4.2V

DSC Port: PS2;Output: PPM

Charger Port: No

ANT length: 26mm*2(dual antenna)

Weight: 392g

Power: 6V 1.5AA*4

Display mode: Transflective STN positive type, 128*64 dot matrix VA73*39mm,white backlight.

Size: 174x89x190mm

On-line update: yes

Model Memories: 20

Works in the frequency range of 2.405 to 2.475GHz.This band has been divided into 142 independent channels,each radio system uses 16 different channels and 160 different types of hopping algorithm.

This radio system uses a high gain and high quality multi directional antenna,it covers the whole frequency band. Associated with a high sensitivity receiver,this radio system guarantees a jamming free long range radio transmission

Each transmitter has a unique ID,when binding with a receiver,the receiver saves that unique ID and can accepts only data from the unique transmitter.this avoids picking another transmitter signal and dramatically increase interference immunity and safety.

This radio system uses low power electronic components and sensitive receiver chip.The RF modulation uses intermittent signal thus reducing even more power consumption.

a contribution from, Leo is a voting member at Linux Foundation & Walkera USA R&D

REDCON Phoenix 210 Racing Quadcopter

Phoenix 210 is creatively designed by combining the advantages of carbon fiber main board and molded ABS arms. It makes the Phoenix 210 stronger, lighter, yet easier to assemble with precision.  I like the different color schemes that it comes with that makes this sporty quadcopter standout during a race.

You will see on the board two DC outputs: 5V / 1A for flight controller and another one labeled with 12V / 1A for accessories.  The Electronic Speed Controller (ESC) are flashed with the popular SimonK program for quick response, smooth throttle and low running temperature.


Item No.: Phoenix 210
Color: Pink, Red, Yellow
Copter Size: 200 x 170 x 65mm
Diagonal Size: 260mm
Weight: About 480g
Material: Carbon Fiber
Camera Pixel: 976 x 582
CC3D Flight Controller Input Voltage: 4.8 – 6.0V
Input: 3 – 4S Lipo
Output: 5V / 1A and 12V / 1A

Package Content:
1 x Phoenix 210 Frame
4 x 2204 / 2300KV Motor
1 x CC3D Flight Controller
1 x Power Distributor
4 x 5045 Propeller
1 x Camera
1 x 200mW 5.8G FPV Transmitter


General Type: RC Simulators
Features: Radio Control
Functions: Camera,Forward/backward,FPV,Turn left/right,Up/down
Level: Advanced Level
Material: Carbon Fiber,Electronic Components
Connectivity Remote Control: Radio Control
Channel: No Transmitter
Mode: No Transmitter
Detailed Control Distance: Unknown
Transmitter Power: No transmitter included
Model Power: 1 x Lithium battery(not included)
Dimension and Weight Product weight: 0.405KG
Package weight: 0.650 KG
Product size (L x W x H): 17.00 x 20.00 x 6.00 cm / 6.69 x 7.87 x 2.36 inches
Package size (L x W x H): 24.00 x 19.30 x 6.50 cm / 9.45 x 7.6 x 2.56 inches
Package Contents Package Contents: 1 x Phoenix 210 Frame, 4 x 2204 / 2300KV Motor, 1 x CC3D Flight Controller, 1 x Power Distributor, 4 x 5045 Propeller, 1 x Camera, 1 x 200mW 5.8G FPV Transmitter

► A Project

► Lesson of the Day:  LiPo – how to use and care