Arms of V4 delaminate

[cwei]

After a baby crash into a field (mud) the front arm is delaminated like puff pastry.
Nearly every layer of carbon came off.

Is it a quality problem of the carbon or are the 4mm too weak?
Or both?

With 5 mm arms the screws would fit again :-) 2 + 5 + 3 = 10

I had no issues with the V3.

[cwei]

Here is another example https://www.youtube.com/watch?v=Xlhkx9ak-zo

[cwei]

Replaced the original 4 mm arms with 5 mm arms. (thanks Kai for cutting)
Now the quad flies like a charm.
No torsion and bending of the arms any more.
The vibrations and oscillations are gone.

[krunked-fpv]

yeah i have a 5mm version and 6mm version -- 6mm version flies best imo :)

…

On Fri, Mar 12, 2021 at 4:53 PM Carsten Weiße ***@***.***> wrote: Replaced the original 4 mm arms with 5 mm arms. (thanks Kai for cutting) Now the quad flies like a charm. No torsion and bending of the arms any more. The vibrations and oscillations are gone. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#24 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKDU7JWK5XZWFBLQJW7RHLDTDKENZANCNFSM4X2OMH5Q> .

[cwei]

This cool frame resonance analysis of the S1 V4 shows why it flies better with thicker/stiffer arms.