It’s been a while but in this very comm someone posted pictures of a quadcopter drone with a 41.4 km drum. I’ll try to dig it up.

Here’s one https://sopuli.xyz/post/21919901, it was a hexacopter, not quad.

And in my search I also came across these links:

• https://en.defence-ua.com/industries/ukrainians_made_an_fpv_with_fiber_optic_cord_stretching_for_41_km-13327.html

• https://defensefeeds.com/analysis/how-do-fiber-optic-drones-work/

And finally here is even a demo video:

• https://sopuli.xyz/post/18922497

It seems fiber works fine even on manoeuvrable drones.