Subject:
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Re: PF train motor
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 3 Apr 2009 00:04:11 GMT
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Viewed:
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18128 times
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In lugnet.trains, Paul Foster wrote:
> set # 8866
>
> http://shop.lego.com/ByTheme/Leaf.aspx?cn=87&d=328
>
>
> Paul
I just noticed the new PF Lithium Polymer Battery Box output is 7.4V. Am I
missing something here? Did they drop it from 9V since most people only run
their train controllers at the 4th or 5th 'hash mark' equating to about 7.4V
maximum? Is this going to pose an issue with longer/heavier trains?
Just thinking...
-Dave
ToT-LUG
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Message has 2 Replies:
 | | Re: PF train motor
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| (...) They made it 7.4V because all lithium polymer battery cells are 3.6 - 3.8V. Since this is a pack with 2 cells in series, you get 7.4V. A 3 cell pack is typically 11.2V. As you can see, keeping the old 9V system was not really an option if (...) (15 years ago, 3-Apr-09, to lugnet.trains, lugnet.technic, lugnet.robotics)
| | | Re: PF train motor / train speed and pulling power
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| (...) Hi Dave, I was lucky to receive an Emerald train as kind of beta tester. It got motorized with a XL-PF-motor as intended in the building instruction, but I have used an old 9V battery box (equipped with 6 pc. of 1.2V NiMH rechargable (...) (15 years ago, 4-Apr-09, to lugnet.trains)
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