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Ignition battery

Old 10-25-2006, 03:42 PM
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kkling77
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Default Ignition battery

Is it okay to run a NiMH battery on the ignition, or is a Nicad more desirable? I have always heard that Nicad's are better suited for ignitions. Personally I have always used Nicad's but was wondering what, if any, issues would result from using a NiMH.
Old 10-25-2006, 04:13 PM
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Jake Ruddy
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Default RE: Ignition battery

cant say I know of any for most ignitions ie: CH I run NiMH on all of mine without any problems.

I can tell you that an airwild hoobies ignition cant handle a 6.0v NiMH vattery because at full charge they are close to 7v and they cant handle that... most anyone else can handle it nps.
Old 10-25-2006, 07:14 PM
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JoeAirPort
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Default RE: Ignition battery

NiMh, NiCd and Lion are all good. There are debates that some ignitions will current spike more than a regulator can handle but with a good quality regulator sized properly, it should be fine.
Old 10-25-2006, 08:37 PM
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JohnVH
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Default RE: Ignition battery

Ive used all of the above.. Now only use LiIons from Fromeco.org on my planes.
Old 10-25-2006, 08:37 PM
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blikseme300
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Default RE: Ignition battery

I had an issue with a Falkon ignition and a "standard" 4-cell NiMH pack. The impedance on these are relatively high and caused erratic running of the engine after a few minutes. Switched to a NiCad and the problem disappeared. Subsequent testing with a low impedance NiMH did not exhibit the same problem. Capacity is not the whole story with NiMH. Impedance is critical, especially where a large number of hi-powered digitals are in use. This is IMHO, why some servos are rated for NiCad use only.

Safe Flying!
Old 10-25-2006, 09:02 PM
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Geistware
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Default RE: Ignition battery

Most twins will draw about one amp.
Singles draw around 600ma.
A NiMH pack of 1400maH or larger should not be a problem
Old 10-25-2006, 09:20 PM
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JoeAirPort
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Default RE: Ignition battery

Yes stick with high rate NiMh and it's all good. The new ones are awesome. I use NoBS, very HD stuff. The 1400 NiMh they have in the sport pack area is good for ignitions.
Old 10-25-2006, 09:22 PM
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Josey Wales
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Default RE: Ignition battery

ORIGINAL: JoeAirPort

I use NoBS, very HD stuff. The 1400 NiMh they have in the sport pack area is good for ignitions.
Im using these in my Yak..2 for the rx and one for the igniton..
Old 10-26-2006, 04:46 AM
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kkling77
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Default RE: Ignition battery

Thanks for the help everyone.
Old 10-26-2006, 09:36 AM
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sillyness
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Default RE: Ignition battery

The NOBS 1950 FAUP pack is about as good as you can get... lower impedance than most NiCds. The newer gen NiMh aren't as prone to vibration either.

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