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Discussion in 'Phantom 2 Discussion' started by mmagic4u, Dec 19, 2014.
Phantom 2 just fell out on air and ideas on why
Front left propeller stalled?
Why would it just stall? thanks
Did you feel a tug on your chain?
It was a joke!
Just a message with "Phantom 2 just fell out on air and ideas on why" does not really help us to pinpoint the problem!
How old is the Phantom? How was the weather? Did you fly in manual mode? Did you crash the Phantom before? Was the battery full? Did you hit a tree? Did it behave in a crazy way? What was the status of the LED's when it came down? Did the props still turn? Did you fly inverted? .............. more .........
My (wild) guess is that you came down to fast, and got in a vortex ring situation...!
I don't see the need for begging for more details.
Let the OP follow up if he's [still] interested.
Got carried away a bit...
New to the board, I felt like I needed to post .... this happened to me, also....
I managed to find out what happens when you walk a downhill path from your home point.... Failsafe mode. I fought like a devil to keep the unit down near me, and it wound up tumbling down hill, bending the gimble mounts badly. Well I fixed it as best as may and flew again. Shaky footage... landed and adjusted the gimble again.
The final test flight... I was taking off, straight vertical, gentle ascent, little to no wind. At 15-20' Bang... power off and the thing came straight down onto asphalt destroying the gimble.
The unit no longer holds position in GPS mode.
Advanced Calibration of the unit and compass do not seem to be helping.
I am afraid to fly this thing right now.
Any input would be most helpful.
I think that it will be better if you start your own thread about this!
This thread is full of winning! Welcome new people. If you crashed your Phantom, the only way we can help figure out what really happened is with video.
I too crashed my P2V+. Took out a motor and broke the ESC in half. Also pulled a plug receptacle off the main board. Yes it landed hard. Before I started repairs I tried to power on. I got almost all of power on tone before the battery shut down. Replaced the shell one motor and ESC and main board. When finished I tried to power on. On the second push all the bars light up plus the red LED. But no tone (that tone comes from the battery). Then I hear a click like a relay opening (also comes from the battery) and it shuts down. I tried all batteries and all do the same thing. But they work just fine in my other P2V+. I've checked every wire, cable and connector all looks good. Any ideas? This was original post. Since then I discovered what happened. What a process that was. Defective ECS. If you put a volt meter on an ESC set for continuity and you get a reading other than zero your ESC has a short in it.
Mine fell out of the air too and i know how your feeling. The only words of wisdom i can bestow upon you are the sobering words uttered by the vendor who told me ".....as a rc enthusiast one should be prepared for prangs and crashes, DJI don`t advertise in the mainstream media but specialist magazines aimed at the hobbiest and home constructor.If you have a crash just repair and fly the thing till you can afford another gimbal " You can see the direction this conversation went but with the craft in full trim your looking in access over £1000 which by any standard and for anyone is a considerable investment. Any hobbiest or home constructor that i know is someone who can create something out of junk and revels in that fact so that argument doesn`t wash with me. Ironically thats what i`m doing, fixing and flying as i can afford it. I never found out what happened and the "techies" ,and i use that term in it`s broadest sense, didn`t either. I changed the battery and haven`t looked back touch wood. Best of luck to you mate on getting answers but i wouldn`t hold my breath.
I had a crash yesterday afternoon.
Phantom 2 H3-3D literally just fell out of the sky.
I was at about 40 meters over the ocean - my home point was at 25 meters off the roof of a seaside hotel.
I switched into fail safe, and as I crash landed literally right on the shore line, it regained the motors just before hitting the deck as I switched into failsafe and landed softly, dragged a few feet and then lifted up to about 10 meters and hovered erratically - I switched to Atti and ditched it on the beach.
In the video you can hear the motor seize up. Upon inspection I realised it was the rear left motor that had totally seized.
All in all came out very lucky as all props were fine, gimbal is fine, GoPro & telemetry all on too.
I will post a video of the moment the motor seized up so you can see and hear what I'm talking about.
I have done a few flights over the ocean and often fly close to the sea. My thoughts are that the motor had a it of salt water from the sea air and over time, corrosion lead to the motor failing.
Is there any way to "Clean" the motors after flights over the sea to prevent this happening in future?
There's not much to a brushless motor to clean. The bearings are sealed to prevent stuff getting in.
When you inspected the aircraft and determined that the rear left motor had totally seized, I'm assuming that you mean you couldn't turn it by hand. Were you able to determine why it wouldn't turn? Was there a foreign object (sand, shell) that was wedged between a magnet and an armature? Was the shaft bent, perhaps from the fall? If neither of these are true, then taking the motor apart to see if one of the two bearings had seized would be helpful in determining the failure.
Here's a video which shows how to take the motor apart.
Thanks for the response.
Upon further inspection, the rear left motor had a screw that had come loose and that was the only problem.
took it apart, cleaned it up and all is 100%
Did you work out why the motor appeared seized ?
What was the actual effect of the screw being loose ?
Did you ever post that video ?