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 Posted - June 02 2011 : 2:35:16 PM
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I have a rebox f-unit and two MU2's. Anybody ever fabricate a dual powered MU2? If so, where can I hook up the wires so the front truck will go foward along with the rear and what not?
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - June 02 2011 : 5:32:43 PM
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| On the rear truck just swap the red and black wires. The issue is finding two matched motors. Unfortunately the motors used varied in there speed. If they are not matched they will not perform well. This said I run 3 Athearn DD40 locos on my layout that are all dual motored. The Athearn ones have better motors though.
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Posted - June 02 2011 : 7:06:01 PM
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quote: The issue is finding two matched motors. Unfortunately the motors used varied in there speed. If they are not matched they will not perform well.
Originally posted by tkruger - June 02 2011 : 5:32:43 PM
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I'm wondering ( being an Electronics Technician ) how hard it would be to add a low-ohm resistor to one of the motors ( obviously downgrade the most efficient, as you can't upgrade electrically to a MORE efficient motor ) and try to get the RPM speeds to match? I have access to all sorts of resistors at work, plus the variable pots. Not sure if the variable resistor pots can handle the amperage of the Tyco PT motors ( or MU2's for that matter ). But I could certainly expend a few components trying. Might be an interesting summer project to try and match PT's and MU-2's together and see just how much differences there are resistance-wise between two similar motors and get them to perform as a dual drive. What I COULD possibly try is to wire a single-value resistor and a variable in parallel, and let the single value be the amp-draw component, and set the variable higher, so more current will flow through the single value. Not sure if that would work or not, I'll ask my engineer at work about that. Path of least resistance should ensure that the variable , if set higher, would draw less current, not more, and could tweak the values to match more perfectly. Worth a shot. I need to get that 8' T-board module finished so I could use that for testing. Well, sounds like an evening project to ME. 
Jerry
" When life throws you bananas...it's easy to slip up"
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