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Mikado . Futaba-RC . HeliProz
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Phantom 2 vision flyaway

JJGONZO

Senior Heliman

Mission Viejo, California

Skip to 2:15 in the footage -high power lines, buildings, overpasses-
I feel bad for the guys who lost the craft. I have had a flyaway and it almost made me want to quit rc

Watch at YouTube

11-27-2013 Over year old.
wrongler

rrProfessor

Brewerton, New York

Did you ever find out what the cause for the failure was? How far away did it travel? What was the damage to it?

" RIP Roman "

11-27-2013 Over year old.
Doublah

Veteran

USA

Wow!! This is off topic, but why does the video camera have so much curves around the horizons? Is that the video camera that comes with it? Does not look so good.

11-27-2013 Over year old.
wrongler

rrProfessor

Brewerton, New York

I thought it was kind of strange that the camera kept panning and tilting or the quad was turning and tilting when it was out of range

" RIP Roman "

11-27-2013 Over year old.
Dr.Tim

Elite Veteran

Mojave Desert

Looks like he lost orientation not control or flyaway. I might be wrong but thats what the video looks like. The Curve is from a wide angle lens .. GoPro are worse! I love my Vision ..!

From Simple minds come simple ideas! Approach Engineering

11-27-2013 Over year old.
HOMEPAGE  
unclejane

Elite Veteran

santa fe, NM, USA

DJI also went to the 5.8ghz band for the R/C link on the Phantom 2, which may or may not have been a good decision. At frequencies that high, the RF is extremely directional and multipath and other interference is a real problem on that band. So that could have been a culprit also.

In any case, since the aircraft was recovered, I'd send it and the video footage back to a DJI dealer in any case and try to troubleshoot it at least. Blech...

LS

11-27-2013 Over year old.
JJGONZO

Senior Heliman

Mission Viejo, California

Flyaways

i don't know what caused the flyaway, but I have heard of several cases already at my local hobby shop and fly field. they tell me that if you dont calibrate the gps correctly and dont wait until you get all satellites locked your will be likely to just fly off on you.
I have tried to make sure I follow all preflight procedures but even with these precautions i have had one more close disaster:
I have a hexa with naza v2. The other day flying in front of my house on gps, the rig would not respond to my stick commands, it was taking off on me! I got into a panic and switched to altitude mode and it started to drop rapidly, in a panic, I switched back to gps, and again it began to fly away. I had to change into altitude mode and back to gps at least 3 more times in order to bring the rig down safely.
I am not sure what could be the problem. I feel like Im playing russian roulette.

11-27-2013 Over year old.
wrongler

rrProfessor

Brewerton, New York

I would seriously think about a kill switch of some kind to shut off the power so if you lose control of it (or sight) you can at least shut it down.
Also might want to take if back where you bought it and get some answers.

" RIP Roman "

11-27-2013 Over year old.
unclejane

Elite Veteran

santa fe, NM, USA

Be sure and setup manual mode and learn to fly in manual. That mode basically turns it into a FBL heli, with only the gyros active. It turns off all the autopilot stuff, so if something has gone insane in the autopilot, you may be able to regain control in manual mode.

Something doesn't sound right; I have 2 Naza equipped machines and one WKM and I don't have those troubles with the GPS modes. OTOH, I don't fly in GPS mode unless I have only one blinking red light at a bare minimum, and generally only if all the red lights go out. You might also check for poor GPS coverage in your area, or if it's being temporarily turned off or disabled. The military still does that in certain areas and at certain times - they let air traffic control know when and where, though, so monitor the ATIS/AWOS at your local airports for GPS outages...

That's where I'd start anyway...

LS

11-27-2013 Over year old.
JJGONZO

Senior Heliman

Mission Viejo, California

Flyaways

Thanks for the feedback

Yeah, it 'd be a good idea to check for sats outages around my area. Camp Pendleton is not too far from here- in fact from time to time i can hear the artillery practice at night.

11-27-2013 Over year old.
JJGONZO

Senior Heliman

Mission Viejo, California

Flyaways

I have repositioned the GPS opposite to the 5.8 transmitter, re-set the settings to gps, altitude and manual modes, then calibrated it out side. I took the rig for a short hover despite the fact that I was a bit nervous. It flew well and held its position flawlessly.

11-28-2013 Over year old.
unclejane

Elite Veteran

santa fe, NM, USA

oh yes.... always keep every antenna the hell away from every other antenna on the ship, forgot to mention that lol. Even a couple inches of additional spread between the video xmitter antenna and the others can help dramatically.

Even when the video/RC/GPS links are on different bands, a stout transmitter may be able to desense the GPS and RC receivers, leading to very bad things happening even at short ranges. The dynamic range of these receivers is basically unknown (I haven't seen a spec on any of my RC or GPS rx's available anywhere), so it's best to assume their front ends are crap and easily overloaded and depressed by strong nearby RF fields.

If you had antennas close together before, that may have been the problem; and it would explain why once it went insane, it stayed insane until impact....

LS

11-28-2013 Over year old.
rocket_33

Key Veteran

Mount Pleasant, Michigan USA

One thing to remember also (it worked for me every time) is when you think it is about to take off, switch immediately to manual mode.

When I was experimenting with the 550 to determine what was causing the fly-a-ways, and of course having quite a few, that was the only saving grace...into manual mode, and the fly it back.

Once I solved it, have had no issues at all

11-29-2013 Over year old.
Stet

Elite Veteran

Key Largo FL

How froggy was it in manual mode? Most have warned me that it is impossible to fly in manual. I will try flying in manual, if I switch to ATT mode, how long will it take?

keepin' it real

11-29-2013 Over year old.
unclejane

Elite Veteran

santa fe, NM, USA

No, manual is very close to a regular old FBL heli. The 3-axis gyros are the only things active in the flight controller in manual and it flies about like that. The only difference is of course the "collective" is slower and the yaw is slower still.

I prefer manual mode myself, since the attitude maintaining tendency of atti and GPS/atti isn't "pushing back" against your stick inputs.

In fact, a multi in manual mode is even more precise than most helis in pitch/roll - there's no "deadband" introduced by linkages and the swashplate, it's completely electronic. This is really nice when FPV....

LS

11-29-2013 Over year old.
rocket_33

Key Veteran

Mount Pleasant, Michigan USA

You should definitely get experience flying in manual mode as this will be your saving grace should something happen in flight (such as a flyaway). The other modes are tools to assist, not to replace learning how to fly it.

As UJ said, it is not too bad but you have to learn how to fly it.

11-29-2013 Over year old.
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Phantom 2 vision flyaway

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