Another Quad Crash, just learning this thing too!

Hi All, 

I'm using all the lastest firmware, 2.5 I believe.  I've been flying my new quad since last Friday, with wonderful results, this APM2 is absolutely incredible!

Anyway, this morning, I was loitering, about 3 meters in elevation, it suddenly went to the ground (hitting it), then back up!  It's never done this before.

I landed it and everything seemed ok, so I flew several times again.  Then "one last flight", I took off like a bat out of heck, (I love doing that!), it went up to about 50 meters, then it stopped responding to my radio, the quad was going left, but I couldn't make it go right.  It still seemed to be flying, but then suddenly the motors stopped, and it fell all the way down on the (fairly tall) grass.  Nothing I could do.  It hit the ground right side up, then flipped over.

I broke a prop is all, I replaced the prop, and everything still works.  I've flown it since, and everything seems to be working fine. I looked at all the connections, everything seems fine.

I don't have a telemetry kit, but I just ordered two of them, so I'll start logging my flights.

I charged the 5000 mah battery and it only took 1700 mah, so I know it wasn't a dead battery.

Does anybody have any ideas what went wrong?  

My theories.

Radio interference.

Short in my kludged 5 volt regulator for my radio camera. (Later flights I disconnected this).  There's no evidence of this happening, I was pretty careful.  I do electronics for a living....

Obscure quad bug in version 2.5.

For show and tell......

First Flight Video, taken Friday, 06-08-2012:

https://www.youtube.com/watch?v=3jo7_x3adNE

(excuse the bad language of the camera man!!)

Picture of me in my shop, holding my quad....

http://siderealtechnology.com/DanAndQuadInShop.jpg

Dan Gray, Portland, Oregon

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • Moderator

    Do you have a camera that transmits the picture to a screen on the ground?

  • It seems the developers are ignoring the presence of this bug in 2.5.x and this is concerning as I have been commissioned to put one of these Hexa's into a commercial application at the mines.

    This is probably the 6th incidence of this random motor cut that I have read.
    As it has happened to mine, I am scouring the forums looking for answers, and therefore have noticed this. Only seems to have happened since 2.5.5 was released.

    Come on guys, don't just fob this off, Dan mentioned the motor cut he had earlier at only 10 meters height.

  • Developer

    It sounds like the expected failsafe behavior for a lost radio signal: Throttle OFF. When the radio loses signal, most RX units will go into failsafe and cut-off the throttle. It sounds like you did a "bat out of hell" straight out of radio range. I had a similar crash, now I stay low and slow...

    Did you range check your radio?

    What TX/RX are you using? (model, brand, freq). Please don't forget to mention the RX as it influences failsafe behavior

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @breadcentric: Evo is coming to town. If you have an #AWS #DeepRacer, you can purchase an extension pack! https://t.co/w60JwI98Hp #Machi…
3 hours ago
DIY Robocars via Twitter
https://t.co/bzpbxytpsv
yesterday
DIY Drones via Twitter
RT @chr1sa: My talk on PX4 and FAA certification is coming up at 1:45 PST today on the PX4 Dev Summit livestream. Includes some cool new st…
Jul 7
DIY Drones via Twitter
RT @seesharp: I'm tuned into the PX4 / Dronecode free live conference. Great stuff. Microsoft AirSim talk in 10 minutes. https://t.co/0zbZ2…
Jul 6
DIY Robocars via Twitter
RT @masato_ka: 距離センサを3つとESP32を付けたラジコンカーをDonkeyCarライクにNNで自動走行。3層FC極小モデルをTensorFlow Lite for microcontrollerで動かしてる。機体は借り物でRumiCarって言います。Tenso…
Jul 5
DIY Robocars via Twitter
RT @SmallpixelCar: My car was able to go all the way autonomously until the crosswalk. It was only 100 yards from the target. What should b…
Jul 4
Liam left a comment on Agricultural UAVs
"Hi
I'm Liam from T-MOTOR. I would like to reach out to see if there is any possibility for us to work together.
We are a propulsion system manufacturer who offers motors, propellers and ESCs for all kinds of drone applications which vary from secur…"
Jun 30
DIY Robocars via Twitter
RT @SmallpixelCar: Smart move. The car used the shadow to guide it through the bridge. This was never in the training samples. But it learn…
Jun 30
DIY Robocars via Twitter
RT @SmallpixelCar: Getting closer to the target. Single camera. Untrained road. https://t.co/Wsr7RwDamj
Jun 29
Richard Cox left a comment on Australia
"Anyone in the DIYDRONES Australian subgroup based in Alice Springs, NT?
I am experimenting with Ardupilot (standard Arduplane), Pixhawk 4 FC in a 4-ch
RC "AXN Floater Jet" foamy plane..."
Jun 29
Omar Sykes left a comment on Australia
"Hi everyone, I am looking for someone who is good at drone building, repair and software in Adelaide. Please give me a call on 0477 319 219."
Jun 29
DIY Robocars via Twitter
RT @RoboticMasters: #donkeycar https://t.co/czuLoVRcA4
Jun 29
DIY Robocars via Twitter
https://t.co/DKQbNTbz0g
Jun 29
DIY Robocars via Twitter
RT @RoboticMasters: Donkey car, car car car car car car; Donkey car, car car car car car car; Donkey Car. Anyone like our tiny tiny donkey…
Jun 29
DIY Robocars via Twitter
RT @SmallpixelCar: After improving DBSCAN speed, I can get 11 frame per second on @NVIDIAEmbedded Jerson Xavier MAXN mode and the autonomou…
Jun 26
DIY Robocars via Twitter
RT @Heavy02011: Join us at next Virtual Race League: ⁦@diyrobocars⁩ Race #4 - Parking Lot Nerds, August 1st https://t.co/5KUpu7VGaH
Jun 25
More…