I have always like the looks of a SW1500. I think they look brutish and all business like.The type of locomotive that will get the job done. I perfer the AAR switcher trucks over the Flexi Coil trucks though.
EMD Switcher ID
- Thread starter jon-monon
- Start date
I have equipped several of my switchers with the Earnst gears also, and they do run much better and are more reliable.
However, I am not an electrical wizard and wonder why the amp pull of the lokie drops with the extra gears installed??? Anyone know why this is?
However, I am not an electrical wizard and wonder why the amp pull of the lokie drops with the extra gears installed??? Anyone know why this is?
The motor is not having to work as hard with it geared down. They might also have less "drag". Less work is less current.
What he said...
Same reason you can lift a 1/2 ton motor with a block and tackle but not with a straight pully...
Or, in simpler terms... It takes a finite amount of energy to move the train a finite distance. With the lower gearing, it takes the same amount of energy but it is spread out in time. If you calculate the total amount of energy USED, it would pretty much be a wash. Move the train faster, use more energy in a shorter time, more draw in current...
(Ow, I pulled a muscle in my brain! Higher math!...)
[sorry, can't spell tonight--pulled a brain muscle... ]
Same reason you can lift a 1/2 ton motor with a block and tackle but not with a straight pully...
Or, in simpler terms... It takes a finite amount of energy to move the train a finite distance. With the lower gearing, it takes the same amount of energy but it is spread out in time. If you calculate the total amount of energy USED, it would pretty much be a wash. Move the train faster, use more energy in a shorter time, more draw in current...
(Ow, I pulled a muscle in my brain! Higher math!...)
[sorry, can't spell tonight--pulled a brain muscle...
]Tom - I totally agree with what you said. However you forgot the temperature inversion conversion factor, which is relative to the dew point temp on a given day and time.
Marty
Marty
That's the one. Earnst only makes one four axle set. One of our club switchers has the Earnst set, the old Athearn motor, and a Bowser pot metal SW1500 casting on it. That sucker will pull the drywall off the walls.
Great. I immagine if I drywall el garaje, I won't want to pull it off any too soon, but lower gears are always better. Us P-K folks are in no hurry.