I did range tests today. While the DJI FPV protocol at 700 mW and 50 Mbps still works very well at a distance over 900 m, the FASST protocol already has regular outages at this distance, even assuming sufficient height and open space. I also tested the flight behind an obstacle, not far from me about 40 m was a large straw stack. If I flew behind the stack, FASST immediately dropped out, while the DJI protocol still ran with only a slight blur. I expected a better result. I want to ask, is it completely common with all other 2.4 GHz protocols that they are totally inoperable behind a nearby obstacle?

Has anyone tested a little more ExpressLRS at 2.4 GHz behind a nearby obstacle? Or is it simply necessary to use the 900 MHz protocol (Crossfire, ExpressLRS)?

Futaba was amongst the best a few years ago especially for plane and wing pilots flying line of sight but times have moved on and the game is now controlled by Lora based protocols be it 900Mhz or 2.4Ghz. Hard to actually recommend any particular one because its a fast changing game. Crossfire has been around for a while now and fairly mature while ExpressLRS and Ghost are catching up. ExpressLRS is fairly cheap if you consider the offerings from HappyModel.

Are you saying that when the LORA (ExpressLRS) protocol is used, comparable results at 900 MHz and 2.4 GHz will be behind the obstacles?

(15-Jun-2021, 02:36 PM)MomoBrut Wrote: Are you saying that when the LORA (ExpressLRS) protocol is used, comparable results at 900 MHz and 2.4 GHz will be behind the obstacles?

Crossfire, Ghost and ExpressLRS all use Lora modulation and perform well at range and offer better penetration.

I will still recommend 900Mhz.