Long Range FPV Builder
Long range is a different sport — you trade thrust-to-weight for endurance, link budget and redundancy. JoinFPV helps you choose efficient low-KV motors, large-pitch props, a high-capacity Li-ion pack, and an ELRS 915 MHz receiver with the right diversity setup. We surface the easy-to-miss requirements: a beefy capacitor on the battery lead, a GPS module wired to a free UART, and a VTX with thermals that survive a 20-minute cruise without throttling.
Typical build specs
- Frame: 7" – 10" long-range frame
- Motor stator: 2806.5 – 3115
- Battery: 6S2P / 6S3P Li-ion (Molicel P42A / P45B)
- Take-off weight: 900 – 1500 g
- Flight time: 18 – 35 minutes
Recommended components
- T-Motor F90 / Brother Hobby Avenger 2806.5 1300 KV
- SpeedyBee F405 V4 + 50A 4-in-1 ESC (BLHeli32)
- DJI O3 Air Unit (HD) or analog Rush Tank Ultimate
- ELRS 915 MHz / 868 MHz long-range receiver, true diversity
- Gemfan 7035 / 1050 efficient bi-blade props
- GPS module (BN-880, M10) for rescue and telemetry
Frequently asked questions
Why use Li-ion instead of LiPo for long range?
Li-ion 21700 cells (Molicel P42A/P45B) deliver roughly 2.5× the energy density of LiPo at the same weight. JoinFPV calculates take-off weight, sag and runtime for both chemistries.
What's the right ELRS frequency for long range?
915 MHz (US) or 868 MHz (EU) gives you significantly more range than 2.4 GHz at the same TX power. JoinFPV warns when your VTX and RX frequencies could interfere.