# My first RUD

**URL:** <https://greyarro.ws/t/my-first-rud/38313>\
**Category:** Racing Quads, Self-builds & FPV\
**Created:** [12 October 2021 14:24 UTC](https://greyarro.ws/t/my-first-rud/38313 "2021-10-12T14:24:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![MerseyViking](https://greyarro.ws/user_avatar/greyarro.ws/merseyviking/32/69839_2.png) [@MerseyViking](https://greyarro.ws/u/MerseyViking)\
**Post date:** [12 October 2021 14:24 UTC](https://greyarro.ws/t/my-first-rud/38313/1 "2021-10-12T14:24:22Z")

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The rain finally stopped. I took my drone from the back of the car, plugged everything in, and away she went. I chatted to a nice couple out for a walk and they were interested. I flew around for 5 mins or so, then, at about 12m altitude a big wobble, a flip, and a pancake!  
It landed flat upside down, breaking the GPS mast and twisting one of the arm brackets.  
Everything else seems intact and I am going to look at the telemetry to see if I can get an idea of what happened. But my feeling is that because I am using stock PIDs, it just got into a situation it wasn’t tuned for and plummeted!  
The mast is easily replaceable, but the bracket might be a challenge. Maybe a hammer can flatten it out, but it’s aluminium, so I don’t know how weak it’ll make it.

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**Author:** ![Nidge](https://greyarro.ws/user_avatar/greyarro.ws/nidge/32/17563_2.png) [@Nidge](https://greyarro.ws/u/Nidge)\
**Post date:** [12 October 2021 15:15 UTC](https://greyarro.ws/t/my-first-rud/38313/2 "2021-10-12T15:15:25Z")

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> [@MerseyViking](#):
>
> at about 12m altitude a big wobble, a flip, and a pancake!

Really sorry to hear this, especially after everything else you’ve endured.

From your description of events it sounds more like one of the motors stalled. This could be due to a poor connection on one of the three phases of a motor, or even a prop nut working loose.

I had a similar incident a few years back. The quad had been happily sat in a hover for about a minute when it suddenly flipped and tumbled to the ground. It took a while to find the fault which, turned out to be a poor and intermittent connection at the point where one of the three wires of one of the motors was attached to one of the three windings, i.e a manufacturing defect.

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**Author:** ![Fluffy](https://greyarro.ws/letter_avatar_proxy/v4/letter/f/9e8a1a/32.png) [@Fluffy](https://greyarro.ws/u/Fluffy)\
**Post date:** [12 October 2021 15:27 UTC](https://greyarro.ws/t/my-first-rud/38313/3 "2021-10-12T15:27:11Z")

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Yeah I wouldnt have thought this was a PID related thing, I flew around for 3 mins on a prop that only had 1 blade left after a crash yesterday, other than the noise couldn’t tell the difference.

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**Author:** ![MartG1960](https://greyarro.ws/user_avatar/greyarro.ws/martg1960/32/163649_2.png) [@MartG1960](https://greyarro.ws/u/MartG1960)\
**Post date:** [12 October 2021 15:42 UTC](https://greyarro.ws/t/my-first-rud/38313/4 "2021-10-12T15:42:16Z")

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As Nidge says, most likely a stalled motor

I had a similar event recently, which turned out to be a loose connector plug on the cable between the FC and the ESC which stopped the front left motor while in flight - fortunately it had caused the drone to just wobble a bit before finally failing so I had time to reduce altitude before it completely failed.