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Old 08-11-2019, 02:11 PM   #1
peterel
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3s2200 hooked up in parallel


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Is it possible to hook up 2 -3s2200 batteries in parallel to run a Sullivan starter? New to nitro but have lots of 3s2200 batteries
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Old 08-11-2019, 02:33 PM   #2
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Re: 3s2200 hooked up in parallel

Yes..but depending on the size of the motor you want to start, a single pack may be fine. I use a 3S 5000 20c pack and it lasts me almost a whole season.
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Old 08-11-2019, 03:19 PM   #3
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Re: 3s2200 hooked up in parallel

It's a 40 size motor but all I have are 3s2200
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Old 08-11-2019, 04:19 PM   #4
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Re: 3s2200 hooked up in parallel

What make starter? 3S should be fine for any 40 class engine on most starters I have seen. I use the one shown in the pic for engines all the way up to the Saito 125.

Your pack capacity should be more than for a day out if healthy. Don't forget the duty cycle is short. However, the C rating may be more important as it indicates how much you can pull before voltage sag.

I found 4S tends to spin a 12V too fast and pop off the spinner. Sullivan makes their larger Dynatron 12/24V unit, but I use that one with a larger cone for a few apps.
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Old 08-11-2019, 04:30 PM   #5
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Re: 3s2200 hooked up in parallel

older yellow sullivan, is all I can tell you. came from estate sale
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Old 08-11-2019, 04:35 PM   #6
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Re: 3s2200 hooked up in parallel

It should be fine. Sullivans are efficient and strong if not abused.
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Old 08-12-2019, 08:16 AM   #7
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Re: 3s2200 hooked up in parallel

The Sullivan is a larger direct drive starter and uses a lot of amperage. I have two geared starters and they are about half the size and use a lot less amperage.
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Old 08-12-2019, 11:45 AM   #8
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Re: 3s2200 hooked up in parallel

I ran my old yellow Sullivan lots on 3s and 4s 2200 packs with excellent results until someone came along that needed a starter right away and talked me out of it.
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Old 08-13-2019, 08:29 AM   #9
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Re: 3s2200 hooked up in parallel

Many batteries when hooked in parallel will discharge each other. The on off switch should be a double pole switch and the batteries connected in parallel only when the switch is on. The batteries would have to be charged separately.
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Old 08-13-2019, 08:49 AM   #10
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Re: 3s2200 hooked up in parallel

When your referring to 3S I take it they are lipos. If so they are fine in any configuration including a combination of series and parallel. You can buy packs 3S2P and charge them as a single pack with the proper balance plug. You do not have to disconnect them. They do not discharge each other.

I use a Sullivan Dynatron 12/24 volt starter and rig batteries to suit the size of engine I am starting. My 3S 2200 of older vintage that I would not use in an airplane is plenty good enough to run the starter all the way up to a YS 1.20. Putting two in parallel will increase the capacity not the voltage. You will be just fine. I know several guys who have been using 4S on they're 12 volt starters for a couple of years now without any problems.

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