locomotive's by atlas

ModelRailroadForums.com is a free Model Railroad Discussion Forum and photo gallery. We cover all scales and sizes of model railroads. Whether you're a master model railroader or just getting started, you'll find something of interest here.


dr.x

New Member
i've been looking at the atlas line of locomotives. most of them have a 5 pole skewed armature motor and dual flywheels. what does mean????
is this good or bad????
 

MLW

Active Member
Very Good

Inside the model locomotive is a small DC (direct current) motor. Good quality units have a drive train that transfers the mechanical power to all of the wheels that contact the track. Early models, and simple direct current motor with a 2-pole rotating armature some inexpensive ones today, usually used a simple motor with a 3-pole armature. One way to improve (my edit -MLW-) performance and smoothness (MLW) is to manufacture motors with a 5-pole armature.

This gives the motors much smoother torque characteristics by reducing the angular increments between each pole. Manufacturers can improve the smoothness even more, especially at low speeds, by angling or "skewing" the armature poles relative to the shaft. This increases the manufacturing cost, but reduces the tendency of the motor to "cog" or have a preferred angular position with the field magnets.

Example: simple direct current motor with a 2-pole rotating armature

More at this excellent website: http://www.electricalfun.com/model_trains.htm

Hopes this helps
 

Railphotog

Railroad Photographer
I means they are more or less like all recently released models! Nothing special or different, these motors and flywheels have been around for quite some time now.
 

jacon12

Member
I only recently bought a couple of Atlas locomotives, one was a GP-7 dc non sound and I installed a dcc decoder in it.. and the other is a Dash 8-30W dcc and sound from the factory. I like the sound in it better than any other locomotive I own and the little GP-7 is just a smooth runnin' little engine. I like Atas products.
JaRRell
 

dr.x

New Member
5 pole

thanks alot guys; now i understand a lot more. the only stupid question is the one you did'nt ask.
so i'll keep asking!!!!
thanks again
 

NYC_George

Well-Known Member
Hi Dr.x
I know the new Walthers Life Like engines with sound only have half size flywheels to make room for the speakers. If this goes for Altas to I'm not sure. I'm also not sure if this affects the none sound units. I like to know this myself. I think they would run better with the full size flywheels.

NYC_George
 

RexHea

RAIL BENDER
Dr.X, I have a pair of Atlas SD-24 Golds (sound) and they are super smooth runners, good pulling units, and darn good looking. With both units' decoders set in the (RTC) regulated throttle control, I didn't have to make any adjustments for MU'ing the units together...darn near a perfect match and wish I had other "Gold" models.
 

NYC_George

Well-Known Member
Thanks Rex for that post on Big Dog's question

Dr.X, I have a pair of Atlas SD-24 Golds (sound) and they are super smooth runners, good pulling units, and darn good looking. With both units' decoders set in the (RTC) regulated throttle control, I didn't have to make any adjustments for MU'ing the units together...darn near a perfect match and wish I had other "Gold" models.
Thanks Rex for that post on Big Dogs's question.
It's good to know how things look under the hood.

NYC_George
 




Affiliate Disclosure: We may receive a commision from some of the links and ads shown on this website (Learn More Here)


ModelRailroadForums.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com

RailroadBookstore.com - An online railroad bookstore featuring a curated selection of new and used railroad books. Railroad pictorials, railroad history, steam locomotives, passenger trains, modern railroading. Hundreds of titles available, most at discount prices! We also have a video and children's book section.

ModelRailroadBookstore.com - An online model railroad bookstore featuring a curated selection of new and used books. Layout design, track plans, scenery and structure building, wiring, DCC, Tinplate, Toy Trains, Price Guides and more.

Top