Originally Posted by JW57RC
Maybe your batteries are getting worn out? You said the problem is more pronounced when the battery is lower. What voltage do you stop flying at? On my HCP 100 with fresh batteries (4.2v), I can fly about 5:30 and the battery is at 3.7v. I don't know much about how low you can go, but I can't concentrate longer than that anyway!
I haven't been able to fly my HCP100S yet (too damn cold outside, -17[c] right now), but I'm planning to plug in my battery alarm/beeper when I start flying.... I'd expect the heli could handle the extra few grams without too much issue.
How to strap it on may be another question of course