Even with the slightly larger Typhoon H, I can only get out to about 3500 feet before I can just barely see it. I did loose sight of it once that far out when I took my eyes off to look at my screen. I looked back up and POOF, could not find it. I knew about where I had left it. Used the arrow on my controller to do a 180 and brought her back. 1500 feet is about the safe limit for my old eyes.