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Lipo's for receiver packs can it be done and how?

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Lipo's for receiver packs can it be done and how?

Old 02-10-2007, 09:17 PM
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dunk
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Default Lipo's for receiver packs can it be done and how?

I have been buying nimh batterys and am looking to get longer flight times and reduced weight. How can a person use the lipo batteries and get a 6.0volt max to your receiver. Is there a voltage regulator that a guy can buy some place? Also what would be a good set up for a 1/4 extra. I am trying to devise a way to use one LIPO that would have the (mah) to handle the current for the ignition as well as power the servos and receiver. Am I dreaming or can it be done? Any help would be appreciated.

I would at least like to use a lipo for the receiver and servos if nothing else.

Thanks
Dunk
Old 02-10-2007, 09:37 PM
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DMcQuinn
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Default RE: Lipo's for receiver packs can it be done and how?

Typically instead of Lipo's we use Li-Ion. It is the same chemical technology, but packaged inside traditional metal clad cylinders instead of plastic pouches. You buy a 2-cell pack that puts out a nominal 7.4 volts. Since this is too high for the receiver and servos, you buy a voltage regulator that drops the voltage to 6.0 volts. You can buy this as a system. See troybuilt for their offering. Fromeco is popular, too.
Old 02-10-2007, 09:38 PM
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Default RE: Lipo's for receiver packs can it be done and how?

Duralite and Fromeco are the popular choices. I charge my Funtana with a Duralite system once every several weekends.
Old 02-12-2007, 07:50 AM
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Default RE: Lipo's for receiver packs can it be done and how?

Wow! Is that true? What is the nominal mAh of your system then? I have measured that for one day at the field (let's say 1 hour total fly time) my plane needs minimum 5 to 6 hundred mAh, not to mention 2 hundred mAh that my NiMH pack loses while sitting between charging to flying (unless I charge the battery on the spot).
That makes a total consumption of 1000 mAh, to be on the safe side.
I can't really dare to fly 2 days in a row with my 2200 mAh battery pack, could you?
That is the point where my question has come from.
Old 02-12-2007, 08:30 AM
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Default RE: Lipo's for receiver packs can it be done and how?

Here's one solution:
http://www.schulze-elektronik-gmbh.de/LiPoRx-e.htm
Old 02-12-2007, 02:58 PM
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Default RE: Lipo's for receiver packs can it be done and how?

Well its a 4000mah pack, I pulled it out of a heli I sold and I figured why not. Its got large high torque digital servos and I fly it 6 or 7 times a day. I've never got it anywhere near stop fly voltage of 6.9 under a 1 amp load. Also with Lithium batteries if I charge it today and take it out July 4th the voltage will be either the same or less than .1v different.

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