FPV Long Range Mountain Adventure with DJI system and Chimera 7 - Lost video at 2km AGL altitude!

*DISCLAIMER*
This video was filmed in accordance with EASA and ENAV regulations in a safe location after consulting government provided airspace maps.

Join me in this FPV mountain climb adventure which almost turned into a disaster.

Video feed is goggle dvr up until I lost video link, then it switches to the recorded air unit footage. Credits to Gal Kremer tool to convert the CSV data from opentx telemetry into viable SRT subtitles : https://kremerfpv.info/#subtitles

Watch my other video for a 9km long range test:
https://www.youtube.com/watch?v=J0ndyKGJ3Dg

Antenna used on goggles:
- Left side: truerc x-air 10db ( https://www.truerc.ca/shop/5-8ghz-2/receiver-long-range/x-air-5-8-for-dji-fpv )
- Right side: 2x prodrone.pl helical 12 turn 14 db ( https://shop.prodrone.pl/pl/p/PRO-Helical-antenna-12-turn-5.8-GHz-14dbi-v2/332 )

This configuration is a diversity setup, the x-air has a very good beam range even on the edges, while the helical is a sort of "bonus" if you manage to point it right, giving you the extra "punch" in signal strength

Pictures of my gear (goggles, drone, radio): https://onedrive.live.com/?id=4E7DDD48D75DE089%2124927&cid=4E7DDD48D75DE089

Drone: Chimera 7 LR ( https://shop.iflight-rc.com/index.php?route=product/product&product_id=1386&search=chimera+7 )
Weight all-out is 1.501 grams, no Action camera.

Motors: 4x Racestar 2508 AirA BP 1.200kv ( https://it.banggood.com/Racerstar-AirA-2508-BP-Edition-4~6S-1200KV-1700KV-Motor-for-Mark4-5-or-6-or-7inch-Long-Range-RC-Drone-FPV-Racing-MultiRotors-p-1710498.html )

Props: Gemfan flash 7040x3 ( https://it.banggood.com/2-Pairs-Gemfan-Flash-7040-7x4-7-Inch-Long-Range-3-Blade-Propeller-Support-POPO-for-RC-Drone-FPV-Racing-p-1520190.html ). I did some tests with the 7042 2 bladed props, they are a little more efficient, but are harder to balance and I haven't been able to avoid vibrations and jello with them, whereas the 7040x3 are very stable with no balancing.

ESC: Mamba f60 PRO ( https://www.diatone.us/products/mamba-f60pro-dshot1200-4in1-esc-60a-6s-30-30mm )

FC: Mamba F722S blutooth ( https://www.diatone.us/products/mamba-f722s-flight-controller )

Battery: 2x (in parallel, 8.000 mah total) 6s Li-On 4.000Mah, 21700 40A Samsung cells (https://www.farinsframes.com/6s-4000mah-40a-21-6v-li-ion-battery-pack/ ). Each battery weighs 440 grams.

BN-220 GPS ( https://it.banggood.com/Beitian-Dual-BN-220-GPS-GLONASS-Antenna-Module-TTL-Level-RC-Drone-Airplane-p-1208588.html ). Turn ON in Betaflight Galileo setting if you're in Europe, it really helps get more satellites.

JHE42B_S active buzzer ( https://www.banggood.com/JHE42B_S-Finder-5V-Super-Loud-Buzzer-Tracker-110dB-Built-in-Battery-for-Flight-Controller-RC-Drone-p-1368186.html). It's a must per long range drones, to increase your chance of finding it in case of model lost / crash.

Radio: Radiomaster TX16S ( https://it.banggood.com/RadioMaster-TX16S-Hall-Sensor-Gimbals-2_4G-16CH-Multi-protocol-RF-System-OpenTX-Mode2-Transmitter-for-RC-Drone-p-1652191.html )

JR Module: TBS Crossfire TX lite ( https://www.team-blacksheep.com/products/prod:crossfire_tx_lite ), set at 500mw (no need for 1W or 2W, LQ always at 99)

Radio antenna: TBS shapeshifter ( https://www.team-blacksheep.com/products/prod:vas_shapeshifter_900 ) , set in vertical position and in directional mode.

Receiver: TBS crossfire diversity nano rx ( https://www.team-blacksheep.com/products/prod:xf_nano_div_rx ) set at 8CH

Link antennas: 2x Truerc bardpole planar bazooka dipole antennas ( https://www.truerc.ca/shop/linear-antennas/900mhz-2/truerc-bardpole-868-mhz ) set at 20 degrees on the vertical plane, since most of the time i fly close to this pitch angle. One antenna in the front and the other in the back.

Video antennas: 2x tbs triumph pro (long range) ( https://www.team-blacksheep.com/products/prod:triumph_pro_sma_lr ). I have also tested the truerc singularity and they perform very similarly to the triumphs, get either one of them and you'll be fine.

Dji unit settings: 1200mw, 50 Mbit per second, High Quality, 4/3 screen, autofocus off, power mode on. I put an extra 30x30x10 5v high rpm fan above the air unit to help cool it down, i feel it's a need at this power output.

Betaflight main settings: 4.2.8 firmware
PIDS: multiplier 1.1
Filters settings sliders: 1.8 / 1.8, RPM filters ON.
ESC settings : 48 PWM, timings 11 (my tests with a power meter show that these settings result in 7% less power consumption compared to the standard 24 PWM / 16 degrees timings)

0:00 - Climb
3:05 - Pan around
4:20 - Video loss
4:31 - GPS Rescue
7:21 - Descent

Видео FPV Long Range Mountain Adventure with DJI system and Chimera 7 - Lost video at 2km AGL altitude! канала Fab FPV