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Old 09-22-2017, 03:17 PM   #1 (permalink)
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Default 250cfx low voltage cutoff

When the low voltage cutoff kicks in, how aggressive is it? I have an mcpx now, and when the lvc kicks in you are coming down right now with a tipover for sure. Hoping the 250cfx is more controllable. Does anybody know what the low voltage actually is? I have a low voltage buzzer that you can set to whatever you want, I would like to use that until I figure out my flight times.
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Old 09-24-2017, 06:14 PM   #2 (permalink)
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I have not dropped into LVC with my 250 but I have with my 230S Night. Basically, feels like half power but I made it back and landed without incident. You can hear it when it happens as the rpm drop is considerable. The 250cfx might have a little less time to land since it is heavier than a 230..... I usually start my landing run after 5 minutes of flight with both the 230 and 250 and have gone as much as 6:20 and still landed without LVC kicking in. Battery voltage after 5 is usually around 3.8 per cell a little lower if it is real windy!
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Old 09-25-2017, 07:26 AM   #3 (permalink)
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I've never had my LVC kick in either on my 250. I usually never fly it longer than 5-5:15 minutes. I try to keep my batteries in decent condition for storage purpose.
I have hit LVC on my 180cfx a couple of times. It comes down and there is nothing you can do to stop it. I believe throttle is cut to 70% in LVC mode. Luckily, I was flying low enough to land without incident.
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Old 11-23-2017, 12:12 PM   #4 (permalink)
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When flying the 250, I use the countdown timer function starting @ 7 minutes & land when the timer hits 0. The voltage under load is @ 3.85 per cell @ that point & you still have a few minutes of flight should the wind pose a problem. Never have I hit LVC flying any of my helicopters due to I don't like to rebuild crashed copters if I can prevent it.
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