I think that standard is 30 m the RTH attitude. But I don't if you guys put another attitude for safety or below a little?

Whatever is higher than anything in the area you'll be flying, trees, structures.

I have mine set at 120 ft. (36m) I have no tall buildings around but do have some trees that are near 80-90 ft.  

Anything under 400 ft you're good to go. I also keep mine at 120 m.

High enough to clear all obstacles.  Keep in mind, if you are set for, say, 90 feet,  and the Phantom is at 120 feet, it will NOT descend to 90 feet.  It will stay at 120 feet until it reaches the RTH point, then it will land.  So, watch out for higher things like bridges, etc....

Hey Kneepuck ,

Thanks for the info. I wrongly guessed the drone would descend to RTH altitude and then return.

If you're flying indoors, (not sure I would with a Phantom but I do it often with my Spark), make sure you change it to be lower than the ceiling. Otherwise, it will attempt to ascend to what it's set for, hit the ceiling and crash.

Yes, I noticed right now. I think that mine is 30 m, and I was 40 m high and ask to return to home. So it came in 40 m and after reach RTH it started descending to the ground.

Sportbike_Pilot Posted at 2017-9-28 10:41
Anything under 400 ft you're good to go. I also keep mine at 120 m.

Keep in mind:

1. You're almost always going to encounter much stronger winds aloft way up at 120m.  The aircraft may not be able to overcome those winds during RTH.
2. It takes energy from your battery to climb up there and descend again.  Not so handy when you're low on battery.

If you need 120m to clear all obstacles for a given flight that's one thing, but keeping it set that high seems unwise if you don't need it.

Irate Retro Posted at 2017-9-28 16:16
Keep in mind:

1. You're almost always going to encounter much stronger winds aloft way up at 120m.  The aircraft may not be able to overcome those winds during RTH.

"but keeping it set that high seems unwise if you don't need it."

Def makes sense especially with CLP and thanks for the tip.

Typically when the MP is in LOS, I'll turn off RTH then work my way to home base. I have it set there b/c for me it's the safest altitude coming in from a long distance. I find it's good clearance for flying I do in this area.

I think it always depends on the flight environment that you fly with, always set a higher altitude than the obstacles around to avoid the potential of the collision, but if it is too high, it might require much power. So it depends.

I set My RTH to 65M that = 213Ft most of the trees where I fly are only 150Ft tall so I give myself a little more for safety

FatherXmas Posted at 2017-9-28 12:13
If you're flying indoors, (not sure I would with a Phantom but I do it often with my Spark), make sure you change it to be lower than the ceiling. Otherwise, it will attempt to ascend to what it's set for, hit the ceiling and crash.

If I were to fly indoors, I would set it to hover only.

Because I will sometimes fly from a deep valley, My RTH setting is 50m.

Above the tallest old growth trees, for sure...


RedHotPoker