Drone and UAV Technology Reviews, Articles, News, Build Logs

Arris X-Speed 250 Racing Quadcopter Unboxing

Written by: Tony Korologos | Date: Tuesday, May 26th, 2015
Categories: Build LogMultirotor AircraftVideo
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I’ve now started a new build, the new Arris X-Speed 250 racing quadcopter which was kindly provided for review here by myrcmodel.com.  The basic frame is put together as seen below.

Arris X-Speed 250 Quadcopter

Arris X-Speed 250 Quadcopter Frame

I shot a five minute video of the unboxing and examination of the parts for the basic unassembled kit below.


Pilot Catch Saves Drone From Ocean Death

Written by: Tony Korologos | Date: Saturday, May 23rd, 2015
Categories: DJIMultirotor AircraftVideo

This is one of the better, and more dangerous drone saves I’ve seen in a while.  The waves and rocks where this guy ends up are pretty risky. But when you have that much dough put into a UAV, you don’t think about that.


Drone Crash – My New Alien H4 680mm Quadcopter Impales Sod

Written by: Tony Korologos | Date: Wednesday, March 4th, 2015
Categories: Aerial ImageryBuild LogCamera GimbalMultirotor AircraftRandomVideo
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I’ve been semi-happily flying this new Alien H4 680mm quadcopter build.  I say semi-happily because I’ve been in jello hell, trying to get rid of the video vibrations and wobbles.  That, and the new landing gear I installed included one unit which was defective.

I spent a week (not 24/7 but you get the concept) balancing props and motors (motor balancing video coming soon) and reduced the overall vibrations quite a bit.  I was out flying over a construction area, where there’s some open dirt and a few unoccupied homes being built.  I was testing to see if I’d gotten rid of the GoPro jello effect.

That’s what I made a mistake that I was not aware of until it was too late.  Suddenly the bird started to nosedive.

It crashed in some very soggy sod behind one of the new houses.  One arm and prop was so impaled, it took almost all my strength to get the arm out of the ground.  There was quite a bit of damage, though mostly small and inexpensive parts totaling up to about $120.00.  The cost could have been far worse.  The hours it will take to get it repaired, after waiting for parts from China, is the real pain.

The Mistake

Fortunately the MiniX flight controller keeps a log.  That way I could look at it to see if any information could help me diagnose the cause of the crash.  The log showed me some good news and bad news.  The good news was that the crash was not due to any kind of equipment failure.  The bad news was that it was user error.

I unknowingly had flipped into manual mode, thinking I had flipped to GPS mode.  At 177 feet the props stopped spinning enough to keep the bird airborne.  Seven pounds of carbon fiber, metal, and plastic hits the ground in about two seconds from that distance.  No time to react.

I couldn’t believe the log and that I’d been such an idiot flipping to manual.  A look at the switch on the remote confirmed MY error.

Solution

I never fly manual and I don’t intend to with this, or any of my copters.  I don’t do trick flying.  My ships are for aerial photos and video.  I plan to either disable the manual switch (not the best idea in case of emergency when GPS fails or somesuch thing), or set my remote to delay 5-10 seconds and produce an audible “manual mode will activate in five seconds” type of thing.

Below are a few stills from the crash video.

This is not supposed to happen...

Battery is UNDER the bird.  This is not supposed to happen…

Battery ejected on impact.  Velcro straps shaved off  with razor precision...

Battery ejected on impact. Velcro straps shaved off with razor precision. Gimbal vibration ball on left flying through the air.  Long rectangular donut-shaped item is one of the gimbal control board box’s side panels, about .5 inches wide and 2 inches long.  It must be right in front of the GoPro lens.

Top gimbal mount plate flying through the air...

Top gimbal mount plate flying through the air…

Motor arm sure looks far away...

Motor arm sure looks far away…

Fat Shark FPV camera flying through the air...

Fat Shark FPV camera flying through the air…

FPV camera flying left of tree...

FPV camera left of tree points back. Too bad it was unplugged and not recording the view looking back toward the GoPro..

AlienCrash.MP4.00_03_40_14.Still008

FPV cam still in air, motor wires from rear motor arm severed…

Battery still in air...

Battery still in air…

Quadcopter impaled in ground. Arm would soon break off.

Quadcopter impaled in ground. Rear motor arm would soon break off.

Assessing the damage...

Assessing the damage…


Broken Gimbal

Broken Gimbal


Carbon Fiber props did some sod cutting

Carbon Fiber props did some sod cutting


Core components and wiring survived. GPS tower toast.

Core components and wiring survived. GPS tower toast.


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