+Prahalad Jake I think 1km its not a problem. Of course You must think about urban antennas etc.In open field 1km is possible. One russian guy flew it to 1530m, but in autonomous flight.
+Jacek Biardzki I have devo f12e. But I haven't tested it at all. I mean I did not fly the drone even once. Its a new one. So can I fly that vertically till 1km atleast?
250 FPV - high altitude Warsaw view (ended with crash)
Test FPV flight of new 250 race copter. Few seconds a little bit higher, where you can observe north and south view of Warsaw and few test loops ended with a ...