Iran

[nonsense]

Originally Posted by ORAC

https://www.gl-fibercable.com/newsde...solutions.html

Why Choose GL-FIBER’s Fiber Optic FPV Systems?

1. Ultra-Thin, High-Strength Fiber Cores

Diameter Options: 0.25mm / 0.27mm / 0.35mm
...

2. Fully Customizable Configurations

Lengths: 25.2km, 50.4km, 60.0km/spool (extendable to 100km)

Originally Posted by artee

Interesting info, but the list doesn't mention weight. That will be the critical thing. No point having a 60km spool if it's to heavy for the drone to fly.

0.27mm diameter gives 0.057 sqmm cross section.
0.057 mm^2 x 1km = 0.057 mm * mm * km = 0.057 mm * m * m = 0.057 litres (per km of fibre).
Glass has a relative density of about 2.2, giving 125 grams per kilometre.
8km per kg; 40km = 5kg, 60kg = 7.5kg.