Bach Spect 440
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Bachmann Spectrum 4-4-0

Engine

This 1:20.3 engine is a 4-4-0 modeled from the general time period of Baldwin Class 8-16C which was first produced in the 1870s.  It is a highly detailed replica of engines of that class.  It is a great base for super detailing a specific prototype of that era.  This engine was produced by Bachmann in the early 2000s and was closed out in 2003.  It is not known whether an additional run will occur.  While this engine listed at around $700, it was not uncommon to find them for sale at the end of the closeout period for $200 - $250.

Drive Train & Chassis

It is not known whether this chassis is available separately from the engine.  Even if available, it is likely the price would approach that of the complete engine at close out prices.  You might ask, "why would you destroy a perfectly good highly detailed Spectrum 4-4-0 to get the chassis?"  This highly detailed component may be worth $200-$250 by itself.  The tender, boiler and cab can be redirected to another project.  If this drive's specifications meet your needs and you are looking for a medium duty drive train, this chassis may fit your needs.

As the photo shows, the motor block is integrated in the chassis.  A complete chassis includes the front deck, front 4 wheel truck, cylinders and valve gear, the driver block and side rods, and the rear frame and coupler.  Valve gear and side rods are metal and fully operational.

Top view of the Spectrum 4-4-0 drive train and chassis.

Click photo for a larger image.
Side view of the 4-4-0 drive.

Specifications

Component Bachman Spectrum 4-4-0 Chassis
Classification Fully integrated power block, frame and chassis
Length Width Height Driver 
Diameter		 Shaft
Diameter		 Driver 
Wheelbase		 Overall
Wheelbase
16" 4" 2.5" 2" 0.35" 4.35" 11"

Overall length includes pilot.  Width is across the cylinders.  Height is at top of motor block.  Driver wheels are all metal.  Shafts mate at center with plastic separator that provides electrical separation.  Electrical pickup is via spring loaded brushes recessed in chassis.  Exterior of chassis is plastic.

Drive Train Comments

Both durability and pulling capacity are awaiting user feedback.

Conversions

English - inches Model 1:20.3 1:22.5 1:24 1:29 1:32
Driver Diameter        2.00        40.6        45.0        48.0        58.0        64.0
Driver Wheelbase        4.35        88.3        97.9      104.4      126.2      139.2
Overall Wheelbase      11.00      223.3      247.5      264.0      319.0      352.0
Overall Length      16.00      324.8

     360.0

      384.0      464.0      512.0

 

Metric - cm Model 1:20.3 1:22.5 1:24 1:29 1:32
Driver Diameter        5.08      103.1      114.3      121.9      147.3      162.6
Driver Wheelbase      11.05      224.3      248.6      265.2      320.4      353.6
Overall Wheelbase      27.94      567.2      628.7      670.6      810.3      894.1
Overall Length      40.64      825.0      914.4      975.4   1,178.6   1,300.5
 

(c) 2007 Iron Horse 1:29