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HelicopterThunder TigerOther › How big do I need to go with a battery pack?
01-23-2007 05:02 PM  10 years agoPost 1
Cliff_B

rrNovice

Grand Junction Co

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Setting up a R90SE w/ digital servos and I realy have no idea how to size a battery pack for this, with analog servo's a 1100 to 1500mah nicad pack and its good to go, but with the high drain of digital's I am unsure. I know a lot of folks are flying with Li-on packs in the 4000mah range and using a regulator to control voltage. I realy do not want to spent 150 bucks on a flight pack, How much current/drain could be expected during a flight? Would a 3600mah NiMH be enough battery for 4 flights? Do I need to be concerned with the Internal Resistance of a NiMH pack or will a 3600-4000 NiMH pack with an Internal Resistance of 20 be ok? Thanks for your responce Cliff

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01-23-2007 05:12 PM  10 years agoPost 2
BarracudaHockey

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Jacksonville FL

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Well Lithium Ion is the way to go but to answer your question you would have to fly it and charge it a few times to see the average of how much is being put back in.

Newer NiMH do not suffer the current delivery problems of earlier generations.

Andy
AMA 77227
http://www.jaxrc.com

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01-23-2007 05:59 PM  10 years agoPost 3
z11355

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New England

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you'll burn up around 300-400mA per flight and you have to
assume that you'll only get about 65% capacity from the batttery
before the voltage is too low.

and you can certainly do a Lithium setup for much less than $150
regardless of the lemmings who only know the phrase 'Arizona'

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01-24-2007 01:36 AM  10 years agoPost 4
baby_zyklon

rrElite Veteran

Singapore

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If budget is tight, use a sub-c or bigger pack. Something like those sanyo 2400mah sub-c pack will work good.

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01-24-2007 02:07 AM  10 years agoPost 5
colsy

rrElite Veteran

Cambridge, UK

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90SE and decent digitals, leaves little excuse to be mean on rx power, you can set up a decent regulated lion/lipo setup for around £60 (sterling) here in the uk.

1800 2S1P is almost equal in output to 3600 nimh (average), with consistency and less weight.

col.

Only Quote From Experience.

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01-24-2007 02:00 PM  10 years agoPost 6
Zephan

rrApprentice

Lompoc, CA

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I just upgraded to all digital on my R50 and decided to try a 4000mah NiMH (its a 7/5 AA 4-pack). It appears to be working out very well. I get 3-4 flights and I'm having to recharge around 1000mah. FFF, aerobatics and mild 3D.


Trex600N & Trex450SE... DAMN! Another radio glitch!

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01-24-2007 06:21 PM  10 years agoPost 7
Cliff_B

rrNovice

Grand Junction Co

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Thanks for the help, I decided to not cut pennies and went with the Arizona set up and a 5400 relion LiON battery pack. Looks like a good system....Cliff

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HelicopterThunder TigerOther › How big do I need to go with a battery pack?
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