The Atlas Classic N Scale SD-7 Locomotive is based
on the prototype manufactured by EMD from February 1952 to November 1953. Utilizing
a 1,500 hp engine and a longer underframe than the GP-7, the SD-7 was the first
locomotive to use EMD's Flexicoil truck. The SD7s are distinguished by having
their classification lights set in from the edge of the hood, on SD9s and later
they were at the outer edge of the hood.
Model Information
Features include:
Innovative Scale Speed™ motor
Direction
Lighting using golden-white LED's
Blackened
metal wheels
Low Friction Drive /dual
brass flywheels
Factory-equipped with
body mount AccuMate®
magnetic knuckle couplers
Will
have a DCC ready frame
PERFORMANCE
INFORMATION
NOTE:
The following categories are the opinion of N Scale Supply and are very subjective.
These are provided to give you a rough idea of the quality of the product. Your
mileage may vary.
Performance:
Very
smooth performer. Excellent low end speed range (this engine has the new Atlas
slow speed motor). Measured top speed was 139mph. Top speedRealistic speed range
(top speed seems to be about 60mph). We dug out an old Atlas/Kato SD9 and compared
the performance. Of course since this new one has the slow speed motor we didn't
expect them to run together, what we were amazed at was the difference. The older
unit was approximately twice as fast.
Sound/Noise
level:
Again, comparing
to the older Atlas / Kato SD9 this new unit is remarkably quieter. I had a Kato
SD70MAC on hand and so compared the two. First, the Kato was almost exactly twice
as fast as the SD9. When you slowed the Kato back from Mach 3 to a reasonable
speed the sound level was very close. I couldn't tell you which was quieter, it
was too close to call.
Overall
Value:
Atlas has
improved the performance of an excellent Classic Engine.
Will
have a DCC ready frame
