DC performance. I tested the model on our DC test track using an MRC Tech 4 power pack. After I set the throttle to 6V, I saw the headlight turn on and heard the 251 diesel engine start rumbling.
When I advanced the throttle to 7.5V, the Alco started rolling at 2.5 scale mph and accelerated smoothly to a top speed of 80 scale mph, which matches one of the gearings available on the prototype.
The locomotive has some built-in momentum in DC mode. Like a real diesel-electric locomotive, the diesel engine rpm increased a couple notches before the locomotive started moving. The headlight operated according to the direction of travel. Activating any other user-triggered effects on a DC layout requires an analog sound controller, such as an MRC Tech 6.
DCC performance. As you can see in the charts above, the Alco also accelerated smoothly on our DCC test track. The model’s 100 scale mph top speed was higher than the prototype. However, it’s easy to lower the top speed, set up speed tables, or adjust any other aspect of the model’s performance using configuration variables (CVs).
A programming guide for ESU LokSound decoders can be downloaded for free at www.esu.eu/en. The website also has links for free LokProgrammer software that can be used with or without a LokProgrammer computer interface (sold separately).
In addition to the bell and horn, user-triggered features include the compressor, sanding valve, air release valves, and a realistic dynamic brake effect. Pressing F9 engaged the Heavy Load effect with Drive/Hold. With this effect enabled, the locomotive speed stayed constant while I used the throttle to notch the prime mover up or down.
Using the LokProgrammer, I also enabled another Full Throttle feature called Coast mode. When I trigger this effect, the engine sounds drop to an idle. I could then use the throttle to adjust the speed without notching the engine. This effect is useful for simulating a locomotive drifting downgrade.
The volumes of each individual sound effect as well as the overall volume can be adjusted via CVs. The volume level is impressive, considering the speaker’s small size. All the functions can also be remapped to any desired throttle key.
On our Alco, I lowered the level of the diesel engine sound and set the horn volume to maximum level. I also set up the headlights for manual, non-directional control by mapping the front headlight to F0 and the rear light to F5.
With the top-notch ESU LokSound decoder and accurate details, this Atlas C-628 makes it easy to add the sights and sounds of a six-axle Alco diesel to an N scale roster.