|
These standards are for two tracks, creating two operating
loops.
Large Scale Train Modules (LSTM) have become one of the
most popular attractions at public events. Their size and variety are very eye
catching and hold peoples interest for long periods of time.
Why Large Scale Module Standards?
With a LSTM
standard, anyone can build one of these modules at home and take it to a show
or club and join in the fun. If you move to a different part of the country you
will not have to rebuild.
The basic concept of these LSTM standards is simplicity.
Easy to build and maintain. Each LSTM can be detailed as an expression of the
builder's talents and interests. By building several LSTMs, an individual can
create a large scene over multiple connecting LSTMs.
The three most critical measurements are LSTM width
of 47 3/16", table top height of 40" from floor to top of plywood, and center
line of the tracks being located 4" from the front and 11 3/8" from the front
for the inner track. Once these three are correct, your LSTM will mate up with
any other LSTM built to these standards. The standards are based on the use of
the popular 4' large scale code 332 brass sectional track. [brand is not
important] The 4' length actually measures out to only 47 3/16". The important
object is to have the ends of the track meet exactly at the edge of the LSTM
for connection with the next LSTM.
The standard depth of a LSTM [front to back] is 30". Some
build deeper LSTMs to allow additional space for structures and scenery. As
long as the front LSTM edge and tracks line up correctly, the depth is not a
problem. You could even have a section drop down for a bridge or trestle as
long as the sides remain at the correct height for the next LSTM.
The wiring connectors between LSTMs are all 4 wire [green,
yellow, brown & white usually] flat pig tails used in wiring trailers.
These are found in automotive sections of stores all across the country. These
connectors are mounted on the REAR edge of the LSTMs and should extend 6"
beyond the sides of the LSTM. A second set of wires is often used to carry
auxiliary power for accessories. Note which plug goes on which end in the
drawings.
The table frame is made of 1x4 board and covered with 3/8"
plywood. Legs are hinged and attached to a support board under the table to
allow them to fold up into the frame work. The legs have adjustable screw type
feet to correct for uneven floors. These feet are normally added by drilling a
hole in the end of the leg and adding a "T-nut" which the foot screws into. If
you can find commercially made adjustable legs that give you 40" in height then
you do not need to make your own legs. Additionally you should have a C-clamp
on each end to help attach and hold to the next LSTM.
Corner LSTMs are typically constructed by clubs. Some
individuals construct their own so they may have a complete operational layout
at home. Using two corners together will give you a 180 degree turn. It will
also give you a center opening of 5' 6" inside the LSTM display if all the
straight sections are 30" deep. This center open section space is important for
the owners who can easily get to any LSTM from inside in case of a problem
during a show.
Painted back drops are not required but again they
represent the modelers work. Keep in mind that if your LSTM is deeper than 30",
the back drop will not line up with the connecting LSTM exactly.
Turnouts, sidings and even yards can be used, however they
will often require that you span several LSTMs that you build as a group and
always set up together. |
