I have had these Atlas locos for some time. They are very interesting units in that they are driven by a can motor with a flywheel. Check out the attachments. They were made in Austria. I am looking for a listing of some sort with a description included.
THose are Atlas/Roca FA1's...Fantastic locos for their time,somewhere around 1978..First N scale locomotive made that had a flywheel.Very similar in construction with the second run Atlas/Roco E8..They didn't pull very well,I believe JNJ and maybe N Scale of Nevada made extra weights that dropped over the top of the chassis.Check out Spookshow for more info...I still run several custom painted sets..
I still have two of these. I kept them because they have a flywheel and I love the FA1 body. I was thinking of cramming a DZ125 or Silver Mini into it.
The DZ125 is supposed to handle 1.25 Amps peak, 1 Amp nominal. That may be enough, but to your question I'm not sure how much current these old beasts draw.
As I recall, they didn't draw down much. The key here is how quickly they started moving or at what point on your transformers speed indicator they started making the pull. Pretty much like any other locomotive at the time. I keep thinking, I suspect the canned motors and fly wheels are add ons. I have an early FA that has the typical Roco open frame motor minus the flywheels. Canned motors were considered a luxury item and was provided as an add on back in the early days of N Scale. this looks like one of the add on kits. Good looking units.
I got one at a Hobby Shop... ...way back when just because it had a READING paint scheme and was noted freight hauler. I have plans to discect it to do a kitbash with the drive and frame- someday(?)(!). Loved that flywheel. The momentum throttle I had at the time just made it a great challenge to bring that sweet thing to a stop like a "real engineer". I was about 14 years old then. I wonder if I can do better now- not having to back her up for overshooting a switch? The unit has a can motor and brass flywheels- stock outta-the-box.
The way I remember it, they ran great, but "wouldn't pull a fat kid on a tricycle". There was a kit that was supposed to help, which included some extra weights, among other things. Current draw was good, and if you can live with the light weight, they ran good, too.