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Cold weather part damage?


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#1 KiloBravo

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Posted 14 December 2013 - 11:42 AM

I understand the affect on battery performance.

What I am concerned about is breaking or cracking of gear boxes and piston heads, at what point should I just stay at home this winter?

#2 kwaispro727

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Posted 14 December 2013 - 01:55 PM

I've played in the snow with my SR10 without any problems.  Whatever the weather, if you are willing to play in it, your gun will handle it.  Unless you are playing in a hurricane or something...  What little heat that comes from your battery/motor will help it a little as well.

#3 Chuck S

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Posted 15 December 2013 - 06:40 AM

The RC airplane hobby keeps pretty good track of LiPO voltages, discharge and charge rates, and temperatures.  Recall batteries are chemical reactions and consequently temperature dependent.  A quick discussion is here (see Fig 6.6.1).  Shows severe capacity drop at lower temperatures.

LiPO batteries should not be discharged when the battery temperature is less that about -10°C/14°F.  That seems to be the operating spec I see in several places although some go as low as -20°C/-4F°.

The gearbox will be sluggish to some extent as the grease thickens as it gets colder but the motor should have more than enough torque to spin it and it will warm up a bit as it's used.  The motor will draw more amps turning the sluggish gearbox further reducing shooting time.  Measured voltage drops as amperage draw increases too.  I tried one of those lil' voltage alarms in one of my AEGs and it started beeping very soon during shooting as the motor pulled the voltage down temporarily even in temperate conditions..

I don't predict mechanical failures in temperatures below freezing.  The RC airplane community likes warm, insulated batteries when they fly in these conditions.  Not sure how to insulate a AEG battery but keeping a spare at body temperature is pretty easy.

NiMH battery may be a better idea in these conditions but I've not seen the data.

-- Chuck

#4 niko_gpsy

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Posted 24 December 2013 - 03:26 PM

KWA guns can handle cold weather unless you are playing in sub-freezing temperatures.  A "problem" you may encounter when playing in the cold would be a non-responsive hop up.  Because the bucking is a rubber type material it will harden in the cold and you will need to shoot about 10-20 shots to warm it up before it can be effective again.  That means you are not going to get that kill with the first few shots.




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