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
