Question: RTH under a cliff

[jjalonso]

SOLVED! check at the bottom ↓



Hi guys,

I have a question about RTH feature and a cliff.

Imagine we are at the top of a cliff of 150 meters over the sea,
And we setup the RTH altitude at 50m,
And we setup the homepoint there at the top
And we fly our drone down the cliff, to 20 meters altitude over the sea level and 200 meters distance from pilot

If we press RTH position:
Will crash the drone on the cliff wall at 50m altitude?

In case of yes, would like to know what can happen if some obstacle avoidance is enabled.

Thanks!
Happy flight!



Best answer: The drone will not crash because RTH altitude is relative to the starting point

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@sar104
No - it won't crash into the cliff because the RTH altitude is relative to the home point, not relative to the ground level (or sea level) below the drone.​

@wytnyt
if you set a home point on top of a hill to say 50m,then descent down say 50m,your height will be negative 50m so if rth is pressed your ac would assend 50m to get to zero height then another 50m per your setting for a total of 100m in all​

 

[sar104]

Hi guys,

I have a question about RTH feature and a cliff.

Imagine we are at the top of a cliff of 150 meters over the sea,
And we setup the RTH altitude at 50m,
And we setup the homepoint there at the top
And we fly our drone down the cliff, to 20 meters altitude over the sea level and 200 meters distance from pilot

If we press RTH position:
The drone will crash on the cliff wall at 50m altitude?

In case of yes, would like to know what can happen if some obstacle avoidance is enabled.

Thanks!
Happy flight!

No - it won't crash into the cliff because the RTH altitude is relative to the home point, not relative to the ground level (or sea level) below the drone.

 

[jjalonso]

No - it won't crash into the cliff because the RTH altitude is relative to the home point, not relative to the ground level (or sea level) below the drone.

Thanks!

 

[wytnyt]

if you set a home point on top of a hill to say 50m,then descent down say 50m,your height will be negative 50m so if rth is pressed your ac would assend 50m to get to zero height then another 50m per your setting for a total of 100m in all

 

[jjalonso]

Thanks you guys, I will update my post to help future newbies.