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HelicopterBeginners Corner › When should Rx batteries be recharged?
10-18-2004 04:33 PM  13 years agoPost 1
aambrose

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Pana, IL

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I have a VelociRaptor 50V2 and I'm using a 2400 mah 4.8v NiCd receiver pack. I also have an onboard battery monitor (VoltWatch) and when the first LED glows into the "Low" side, my digital volt meter reads around 5.0 or slightly greater (under load). Which indicator should I rely on mostly and when is it time to recharge?

Thanks!


Tony

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10-18-2004 04:50 PM  13 years agoPost 2
Ringding

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Austria

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10-18-2004 05:16 PM  13 years agoPost 3
BC Don

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Calgary, AB Canada

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I check the LED out by moving all control surfaces at the same time to put some load on the system. If I'm at the field and it goes into the yellow then I'll continue to fly but not if it goes into the red. I generally just recharge them before the weekend and then on Saturday evening if I've been flying Saturday.

Got Money? Send it to me, I'm a Heli Addict.

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10-19-2004 01:08 AM  13 years agoPost 4
baby_zyklon

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Singapore

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remember to check immediatly after you end you flight, not before you start the next flight. Btw, with a 2400 nicd pack, you should be able to do up to 5flights(12min or so each) or more with full analog and a digital on the tail. Or just charge whenever you are free. It doesn't harm to have more juice left in your rx pack...

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10-19-2004 02:00 AM  13 years agoPost 5
yugi

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Maryland

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I have the same batt as you. I use 8311's and a 601. I charge after 2 flights no matter what the meter says....I rather be to safe then sorry!

If you keep doing the same thing…...you’re going to get the same results!

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10-19-2004 11:05 AM  13 years agoPost 6
Al Magaloff

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Tony, you will find that the Voltwatch is rather conservative on the low side. I took all mine off. The loaded(500ma) voltmeter does what I need doing.

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10-19-2004 12:34 PM  13 years agoPost 7
dariof

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Henderson, NV /​Laguna Niguel, CA

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Used a voltmeter..forget the light bars. You want a LOADED voltmeter...1/2A for non-digital servos and 1A for digitals.

Plug the voltmeter in just AFTER a flight to get the best reading.

Stop fly with 4.8V battery is 4.9 for non-digital and 5.0V for digital. I always stop around 5V or so regardless.

It is far better to err on the side of caution here. Yes, with 5V you can probably squeeze a couple more flights out....but what for? Charge the battery back. I have seen too many crashed and total losses from a simple thing like battery juice running out. Doesn't make any sense.

Best Regards, Dario

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10-19-2004 03:32 PM  13 years agoPost 8
aambrose

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Pana, IL

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Thanks for the input guys! I forgot to mention in my initial post that I am running all JR811 digitals and a Futaba 9254 tail servo. I stuck the VoltWatch on just to give me a quick visual but I also use my digital volt meter like this one. I would obviously rather be safe than sorry so I'm assuming that I should field charge my receiver pack when the digital volt meter reads 5.0 (under load) immediately after a flight. Is this overkill or a good point to recharge?


Tony

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10-19-2004 05:00 PM  13 years agoPost 9
dariof

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Henderson, NV /​Laguna Niguel, CA

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aambrose

You are on the right track. 5.0V under load JUST after a flight with your digital servos is a good bet. Remember, with all digitals, test your system with a 1.0A load....with analog servos use 0.5A load.

As I said earlier, maybe you can squeeze another flight out, but what for? Charge the battery and go have fun for several more flights.

Also, when the gyro doesn't get the voltage it needs...goodby. They have a habit of resetting themselves (which means turns off).

I use the 5.0V rule with digitals and the 4.9V rule with analogs....the rule is simple....... RECHARGE

Best Regards, Dario

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