Re: PF train motor

In lugnet.trains, Dave Sterling wrote:

> Thanks again for the electrical information.  I'm an electrical doofus.  ;-)

So am I.  However, I'm also into R/C aircraft so I have a long history with
batteries and motors and could talk your ear off about them.  I could also
explain why the battery pack costs so much!

> Thanks for the awesome explanation!  I learned new stuff today...does that
> mean I can go home now?  :-)  

Yes, I give you permission to go home.  You can tell your boss I said so.

> I'm excited to see how the new motor and battery box
>  pull.  I think the new PF trains could add a lot of functionality to existing
> 9V  layouts.  I'm planning to incorporate PF into my layout for BW for sure.

I got to try out the new controller, motor, and battery along with the Emerald
Night train at Brickfest.  I didn't notice any lack of power.  The train was
running on a Power Functions XL motor which oozes with power.  Knowing that the
same motor can also operate on 9-12V, you could always use your own battery pack
if you really wanted more torque.  But I think you will be pleasantly surprised.
Consider that, even at only 7V, a <http://www.philohome.com/motors/motorcomp.htm
PF XL motor has over 14 N-cm of torque>.  Comparatively, the old 9V train motor
had only 1 N-cm of torque at 9V.  The PF motor also runs much slower so needs to
be geared differently to get the same speed, but factoring all this in you end
up with about the same pulling power at the same speed.

Eric Albrecht

<http://www.ericalbrecht.com/technic/ Technicopedia>