Does anybody have a rough guide to what altitude the fc40 goes into failsafe, and more importantly what sort of altitude does the phantom go out of eye sight. I have never gone that high yet but am going to try a high altitude flight soon but have nothing to cage on hight really. Be good to know when the phantom starts going out of eye sight on a clear day to how high it actually is, I know we all have different eye sight but there must be a sort of point were most cant see a phantom on a clear day. All so does the transmitter make a sound or anything to let me know i have gone to high and its gone into failsafe mode returning home. I have learnt how to regain control i think by flicking S1 to ATTI and back again but dont know how i can tell the phantom has gone into failsafe in the first place. Any help would be gggggreat.