LongRange FPV miniquad (5km)

I guess it needs better position of FPV antenna to have trouble-free way back home. 6km+ would be doable then.
No special equipment:
- Martian II 250mm
- DYS SE2205 2300kV, DAL 6040x3
- littlebee 20A
- 4S 3700 (340g)
- FrSky L9R receiver
AUW 780g