I have an issue with the terrain following function when planning surveys in QGC. I originally thought it might be an iOS issue, but have tried it with my laptop as well as iOS i-pad and get the same results.
When i have completed a flight plan, and i select terrain following, when starting my mission the copter simply climbs vertically and keeps going upwards - i have had to abort mission when it gets to 120m. Regardless of the mission alt i set (usually 75m), this happens every time and i am having to abandoned terrain following.
I cannot work out what i am doing wrong and if i am setting my planned home altitude wrong (i simply place the planned point as close to my vehicle launch spot as possible) or why it does this. If i fly at a fixed alt without terrain following, it works just fine.
Any ideas or advice would be appreciated.