This project started with the goal to build a sub-250g 5-inch FPV drone including the battery. After extensive experimentation, the result is one of the most efficient long-range — achieving a remarkable 51 minutes of flight time at around 2,300 meters above sea level.

Frame & Flight System
The build is based on the Ummagawd 2fiddy frame — a lightweight and durable frame . For propulsion, I used MAMBA TOKA 2004 1700KV motors.

The flight controller is the Axisflying Argus F7 40A AIO F722 all-in-one package. To reduce overall weight, every component matters,

Propulsion & Video System
The propellers are HQProp 5.1" bi-blades, offering a great balance of thrust and efficiency.
For video transmission, the drone runs a DJI Caddx Vista digital system paired with the Nebula Pro camera

Battery
The power source is a custom-built 6000mAh 4S 21700 Li-ion pack, built by myself at Litio-House, my lithium battery development start-up in Mexico. This pack is optimized for long-range performance while keeping weight as low as possible.

Radio:
Frsky x9 lite with crossfire Tx ground
crossfire nano receiver in the drone

Tuning & Flight Results
To maximize efficiency and compensate for the additional battery weight, PID tuning was adjusted. The drone was flown at an altitude of 2,300 meters above sea level, where it reached a total flight time of approximately 51 minutes

There’s still room for optimization, and I’m sure that this record could be extended even further.