Hi,

I build the S800 wing following Oscars blog. 
I actually build two. One for my father in law and one for myself.
The one for my father in law is flying great. It's wihtou FPV gear.

Mine has FPV gear so I mounted a Matek PDB which I still had lying around to provide 12VDC for my camera and VTX.
The 5VDC I used to power the FrSky D4R receiver and in this way also the servos.

I have no experience flying wings so the taking off was a bit difficult.

On my third try I crashed in grass. I was on a big grass field.
As soon as I hit the ground my transmitter reported telemetry lost.
I opened it up and noticed that the PDB was only providing 12VDC but no more 5VDC.
I noticed some components on the PDB burned.

Yesterday I placed a new Matek Mini PDB. https://www.multirotorparts.nl/matek-pow...v-bec.html
I noticed that at first there was no 5VDC led. Unplugging one of the servos solved this.
So it seems that the servo has a short.
The other servo doesn't have a short but still it's not working.
I took two spare servos and they work OK.

So now for my questions:
- What could cause a servo to short out?
- How could a crash cause these servos to die? They are protected in the foam of the wing.

The servos that come with the S800 are very cheap and easily damaged. Just replace them with some decent metal gear servos.

I was already using metal gear servos.
I'm using these:
MG90S Metal Gear RC Micro Servo
https://banggood.app.link/iCdupAUPDY

This is my first time using servos since before I was only flying quads.

After replacing the servos I was able to do some flying yesterday. 
Man this is much harder then flying my quads. It's so unstable in the wind.
Had to climb a tree after an unplanned landing
I'm still flying LOS as I'm afraid that it's much to wobbly for fpv.
But with LOS it get's (to) far away from you very quickly.

I token apart one if the defective servos and found that it is definitely the cause of a short.

(28-Jul-2019, 01:27 PM)ShadowFPV Wrote: After replacing the servos I was able to do some flying yesterday. 
Man this is much harder then flying my quads. It's so unstable in the wind.
Had to climb a tree after an unplanned landing
I'm still flying LOS as I'm afraid that it's much to wobbly for fpv.
But with LOS it let's (to) far away from you vvery Quickly.

I token apart one if the defective servos and found that it is definitely the cause of a short.

Those are the same servos I have in my wing.  I might take them apart and put a strip of vinyl tape over the circuit board to protect it.

(28-Jul-2019, 01:27 PM)ShadowFPV Wrote: I'm still flying LOS as I'm afraid that it's much to wobbly for fpv.
But with LOS it let's (to) far away from you vvery Quickly.

I actually find flying wings FPV much easier than flying LOS - just like with quads. I'm learning to fly LOS, but sometimes it still happens that I lose orientation and need to quickly put on goggles to save it. The wobble is definitely there, but it's not that bad. Give it a shot!