I am just getting into kinda longer range stuff wit my quad.  I have a question Does anyone use a RTH failsafe?  I know on my 550mm it has a NAZA v2 so if I lose signal or anything it returns to home, or at least fly's back so I can regain control.  Has anyone has experience with doing this on a smaller quad?  I have a 220mm that  I am trying to use for this but I don't want to lose it.  I think the weight of a small GPS ant. would be worth the extra sense of secuity.  

Opinions?

Betaflight has now the GPS Rescue Mode, which I haven't tried yet but I am planning on do it for my mini quad. You can trigger it with a switch or with failsafe. There are plenty of videos out there with people trying this feature and it seems to work good. It is not a "complete" RTH funcionality, but gives you the chance not to loose your quad if you loose RX or video signal, and can be used with very small GPS devices.

I personally do not have GPS or messed with them. But if you want RTH, the best firmware would be iNav. Depending on how much space your 220mm, it will be be a tight fit with the Naza and GPS.

Yes I want to get away from the naza. It was my first one but now I've used BF and an addicted. ?. Im thinking Inav and an F4 fc. It had way more options. Naza is nice but it's like having training wheels!

I am not sure if RTH will work without Baro. The problem is, most FC made for FPV do not come with Baro.

The new RTH feature with BF 3.4 and above doesn't need barometer for RTH.  The BF version isn't as comprehensive as an iNav system, but it gets you the very basics of GPS and will return to home activated by switch or failsafe.  The biggest reasons to go with the BF system is size of the GPS unit, weight, and cost.  16.00 for the unit, and it is about the size of a quarter and only about as thick as 2 quarters stacked.  One thing I realized on my first install of this system on my current build, no instructions or wiring diagrams, etc. come with the GPS unit.  All you have is what is on the RDQ site I have linked here.  It's enough, but it startled me when I went to do the install and had nothing.  I didn't know what was the VCC line, ground, nothing.

(21-Sep-2018, 02:09 PM)Krohsis Wrote: The new RTH feature with BF 3.4 and above doesn't need barometer for RTH.  The BF version isn't as comprehensive as an iNav system, but it gets you the very basics of GPS and will return to home activated by switch or failsafe.  The biggest reasons to go with the BF system is size of the GPS unit, weight, and cost.  16.00 for the unit, and it is about the size of a quarter and only about as thick as 2 quarters stacked.  One thing I realized on my first install of this system on my current build, no instructions or wiring diagrams, etc. come with the GPS unit.  All you have is what is on the RDQ site I have linked here.  It's enough, but it startled me when I went to do the install and had nothing.  I didn't know what was the VCC line, ground, nothing.

Please forgive me as I've not researched this so there may be an obvious answer, but how does RTH work without a barometer? I thought one of the points of RTH was that it first climbs to a preset safe altitude (so that it will have a greater chance of not colliding with any obstacles on the way back) and then it returns to the home point at that altitude, same as the DJI camera type drones do? Or am I wrong?

EDIT: OK, ignore me. I just used my brain and I guess that the GPS data probably provides BF with distance from multiple satellites so it can use some sort of "triangulation" data to calculate how high up the quad is.

(21-Sep-2018, 05:45 PM)SnowLeopardFPV Wrote: Please forgive me as I've not researched this so there may be an obvious answer, but how does RTH work without a barometer? I thought one of the points of RTH was that it first climbs to a preset safe altitude (so that it will have a greater chance of not colliding with any obstacles on the way back) and then it returns to the home point at that altitude, same as the DJI camera type drones do? Or am I wrong?

EDIT: OK, ignore me. I just used my brain and I guess that the GPS data probably provides BF with distance from multiple satellites so it can use some sort of "triangulation" data to calculate how high up the quad is.

You got it on Edit, SL