JJRC H28C Camera Quadcopter Review

JJRC unique quadcopter design with a detachable arms is welcome by many park flyers.  The JJRC H28C comes ready to fly (RTF), propellers all assembled, with a 2.0MP camera, made to reduce transportation size.  All you need is to reattach the arms and add the optional camera and landing skid to begin flying.

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First impression, the concept of detachable arms is great, but some hasty changes to accomplished the design, may require a second look and refinement.  The arms are attached with classic t-plugs aka Deans connectors and hook on with side clips. The material used is light-weight Acrylonitrile Butadiene Styrene (ABS), a common thermoplastic polymer (also used by Lego).  It is impact resistance, tough and heat resistance, but the interlocking joints weaken the structure and makes it vulnerable to break along the arms.  The JJRC H28C quadcopter flies at moderate speed with a 2 cell 30c battery.  Not really recommended for beginners, but if you are keen to learn this is a nice size quadcopter with protective guards.   It is stable, you can do some nice turns with both sticks on a turn at the same time.  It can handle moderate amount of wind outdoors.

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Where to Buy

A GearBest Pick 2016 ►http://dronemission.com/find/jjrc-h28.php

Target Audience
Keen Beginners, Park Flyers, Ready To Fly, Off the shelves, Budget under USD $80

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 8-10 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, laythe 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. The quadcopter is now live, and movement on the throttle stick will rotate the propellers.  To stop the motors, lower the left throttle stick to the lowest point.

Not all propellers will start at the same time.  No fear, throttle up to 60%, forward and it will stabilize in flight, when the gyro compensates for the thrust produced by each propeller.  Binding on a flat surface can also help correct the leveling of the quadcopter.

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.

There are 3 level speed switching between 40 / 60 / 100 percentage for both beginners and expert mode.

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.

The landing skids are a little too narrow, making it difficult to land without toppling over.

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 continue to fly, it would have been better if it descend slowly.   Unfortunately there is no way to stop it from flying away, if you lose radio signal or when your radio transmitter is out of service.

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Factory Specifications:
Brand: JJRC
Item No.: H28C
Copter Size: 47 x 47 x 19cm
Diameter: 56cm
Weight: 390g  (DM Minimum Flying Weight: 346g)
Charging Time: About 150min
Charging Protocol: USB
Flight Time: 8 – 10min
Frequency: 2.4GHz
Gyro: Built-in 6 Axis Gyro
Camera Pixel: 2-mega-pixel
Control Distance: About 250m
Copter Battery: 7.4V 30C 1200mA Lipo Battery
Battery Size: 3 x 1.7 x 6.8cm
USB Cable Length: About 65cm
Control Battery: 4 x 1.5V AA Battery
Function: Turn Left / Right, Forward / Backward, Up / Down, Left / Right Sideward Flight, with Light, Rollover, Speed Switching, Film and Shoot, Headless Mode, Hover, One Key Automatic Return (none GPS), Trim

 

Flight Characteristic

The H28c tends to yaw at a high rate, a little movement on rudder stick will rotate the quadcopter, go easy on the yaw.

Press the top left button to increase the level speed switching from 40 to 60 or 100 percentage for outdoor flights, to give you better control over the H28c

 Conclusion

The concept of detachable arms for transportation is great, but I personally feel that the design to it can be more refined instead of just dean t-connectors to each arm.  Quick assembly to the landing skid and propellers guards should follow the theme. Self tightening propellers would have been appropriate too.

Since the camera is not really something I would rave about, I would suggest purchasing it without the camera, and maybe place a HD keychain camera.  A remotely controlled candy drop box would have been a better idea.

If you are looking for a budget quadcopter for casual flying, this quadcopter is appropriate.  The quadcopter has a good range but without failsafe, flying beyond half the distance of line of sight can pose a risk.

In terms of ranking, I would say it is in the lower half of what’s new in the market April 2016  ($79.99) due to lack of failsafe. (Current Picks dronemission.com/top5).

Feedback to JJRC or Notes Worthy Cons

  • Failsafe needs to programmed, when you lose radio signal after 5 seconds, the quadcopter descend slowly.  
  • Glitches, losing yaw control at times.
  • To improve on camera, since it is below par compared to similar budget quadcopters (2016)

Living Blog.  Be back shortly. source: http://youtube.com/diydrone

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► A DroneMission.com Project

Contribution by the DroneMission.com Usability Test Team, a voting member of the Linux Foundation dronecode.org, board member Kinglea UAV and Walkera USA.  Sharing, repost and raving about it.. welcome!

Magazine Time  Capsule

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GTeng T909 FPV Watch for Drones

GTeng T909 is 2.6 inch LCD Screen FPV Watch, with a wearable receiver 5.8G for real-time video reception.  Now if you want to form a shot or take a peek at your OSD altitude, you can peek at it on your watch.  The 5.8G antenna is built-in with a 3dBi copper tube.  You can turn on and off  with the power button and best of all, the channel change button allows you to easily select the correct 32 channels.  Powered by a built-in 350mAh Li-Po battery and charged up via USB.  You get about 60 minutes of runtime per charge, unfortunately the range is 60 meters, but may just be perfect to use for finding a lost quadcopter drone when you are within 60 meters.

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Factory Specifications

General FPV Receiver
Dimension and Weight Package weight: 0.180 kg
Product size (L x W x H): 1.80 x 5.50 x 5.50 cm / 0.71 x 2.17 x 2.17 inches
Package size (L x W x H): 6.00 x 10.00 x 19.00 cm / 2.36 x 3.94 x 7.48 inches

A Gearbest Pick ► Find Where To Buy http://dronemission.com/find/gteng-t909.php

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We will be testing it the next two weeks.  Like we always suggest to manufacturers, if you are going to make a watch-like item, just put the time, so at least it serves two purpose, if you are not flying, it is still a real watch you are wearing.

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► A DroneMission.com Project

Living Blog.  Usability Testing in Progress, be back shortly. source: http://youtube.com/diydrone

Contribution by the DroneMission.com Usability Test Team, a member of the Linux Foundation dronecode.org and an board members of Kinglea UAV and Walkera USA.

First Drone Formula Race F210 Walkera

The Orlando FPV RotoRacers, a MulitGP league located in Florida will host the world’s first Formula Race F210, where pilots will fly the same model, the Walkera F210, on a “spec” formula race. This will put the pilots to a test of skill with the same radio transmitter, same racing drone. The winner gets to keep what he or she flies for that race! Rules and format will be defined by the club and registration can be found at MultiGP.com. Come participate for a fun filled fellowship day.  Open to the public and free to attend.  This event is made possible by Walkera, DroneMission.com for organizing and the great team of Orlando FPV RotoRacers.   May the best pilot wins!

To support local racing clubs, Walkera USA will be visiting the Orlando FPV RotoRacers on May 1, 2016 to kick-off the first Formula Race

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Specification:
Model Class: Walkera F210 Racing Quadcopter
Size: 210 mm
Video Transmitter : 5.8 GHz
Antenna: Left
Video Transmitter Power: 200 mW
Battery: 4S or 3S (recommended 4S) XT 60
Prop Size: 5030
Motors: 2500 KV
Flight Controller: F3
Weight without battery: 395 grams

  • Time: May 1, 2016. Gates open at 7am. Registration close at 9:30am. Race starts at 10am
  • SouthPort Community Park, Orlando, Florida: Directions
  • Entry: Free Open to public (local chapters may charged racers $5 for the point race)
  • Race Registration at: MulitiGP

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Additional Information:  Pilots will compete in qualifying rounds in the morning and the top 3 pilots will compete in and for the Walkera F210 at the end of the day.

A DroneMission.com Project

 

 

 

 

 

 

 

 

 

Walkera Goggle4 FPV Glasses

Walkera Goggle 4, HD Aerial Video Glasses with 40 channels and DVR, including dual diversity antenna with a 1 km 5.8 gHz video range.  Continuing the evolution of FPV goggles, Google4 (v4) comes with no surprises, expand the number of channels to 40 for drone racing, strengthen the range with dual diversity antennas and explore HD capabilities.

The Advanced Edition DVR allows you to record your flight, to replay and log your flight in the event you need to revisit your GPS coordinates!

Also retaining old classics for FPV planes, head tracking gimbal control and headphones.  Yes, we still love to listen to the prop on the plane, sometimes … so we can determine engine failure.

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Two versions are planned for. Beta testing continues, we will report back shortly.  Planned for release May-June 2016.

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Similar Goggle Alternatives
Users have recommended these 2016 alternatives: Walkera Goggle4 Entry level, Kylin Vision, Eachine EV800. See comparison video.

 

Complementing the release of Goggle4, a F210 3D edition is released.   F210 3D is a quadcopter with an optimized F3 flight controller paired with reversible electronic speed controller (ESC), allowing you to reverse the motor at mid point to fly upside down in a 3D manner. At flight mode 0 (FMOD=0 factory default) normal  flight takes it toll, flip the switch to FMOD=1, it will go into 3D mode, motor brakes and reverses.

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Living Blog.  Be back shortly. source: http://youtube.com/diydrone

A DroneMission.com Project

Walkera F210 3D racing drone

Walkera does it again, taking the guesswork out of putting together a 3D racing quadcopter drone.  F210 3D is a quadcopter with an optimized F3 flight controller paired with reversible electronic speed controller (ESC), allowing you to reverse the motor at mid point to fly upside down in a 3D manner. At flight mode 0 (FMOD=0 factory default) normal flight takes it toll 2D, flip the switch to FMOD=1, take-off in 3D mode, motor brakes and reverses at mid-point.
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F210 3D is upgraded with faster receiver response time, stronger frame, and superior low lux Sony HD camera.  Pre-installed with a 5.8 gHz video transmitter and On Screen Display (OSD) to assist pilot in flying and replaying every favorite scene of a flight.
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How to engage 3D on a Devo Radio:
•Replace your racing propellers to 3D propellers.
•After binding the radio transmitter, you turn the FMOD switch to 1 or 2.
•This puts the throttle stick at about midpoint, 45%-49% position (show on your screen)
•You now unlock (arm) at the midpoint, by moving the Rudder (Yaw) stick to the left side and hold for more than 2 seconds.
•You will see the right red LED light keeps on and buzzer issues a “B B” tone, indicating the motors are unlocked.
•be very careful now, at this point pushing the throttle up above midpoint will start the motors and lowering below midpoint will reverse the motors.
• To STOP the motor instantly, flip the switch to 2D FMOD=0, and lower your throttle to zero and right (lock to disarm).  This also acts as your safety switch.

Please note, your original F210 can be 3D too, you just need the 3D props and program it yourself (ESC), or you can buy it ready RTF from Walkera.  Your Devo radio are programmed exactly the same.

Complementing with the F210 3D is the Walkera Goggle4, a HD Headplay with 40 channel and DVR, dual diversity antenna with a 1 km 5.8 gHz video range.

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We are beta testing this 3D quadcopter this month.  Planned release date May 2016.
Living Blog.  Be back shortly. source: http://youtube.com/diydrone
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