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NTRAK Module Profile -- John Wallis
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T-TRAK Module Profiles
John Wallis

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Table of Contents

T-RAK Modules

  Green River WY / Green River East

  North Pole

T-TRAK Modules Page

NRMRC Home

Click on title for desired module.

Introduction

This page provides details of the T-TRAK modules built by John Wallis.

Legend

All descriptions refer to looking at the front of the module.
CCW = Counter-clockwise; CW = Clockwise


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T-TRAK Module: Green River, WY / Green River East

Owner Name:

John M Wallis

Status:

Track & wiring complete. Scenery underway

Date Built:

2012 – 2015

Certified:

Certified, 2019

Module Type:

Green River: Quad width, 14" deep module, with 1" front extension and removable skyboard.
Green River East: Double with removable skyboard.

Width:

Green River: 48.8"
Green River East: 24.4"

Depth:

Green River: 15" Extends 1" to the front.
Green River East: 14"

Passing Sidings:

Red & Yellow

Other Tracks:

None

Industrial Spurs:

None

Yard Tracks:

Three tracks, off Yellow

Engine Service:

Four tracks, off yellow ladder

Crossovers:

Double crossover red/yellow

Electrical:

Track Feeders:

Yes

Turnout Control:

Digitrax DS51K1/DS64 decoders. Powered from Red track.

Accessory Bus

Yes

Other:

TrainSpeed speedometer on Red track, powered from Accessory Bus via 0.5A Slo-Blow fuse and diode bridge rectifier.

Special:

This module must be connected to DCC power only.

Packaging for Transport:

Green River packaged with Kimball. Green River East packaged with Kimball West

Track Plan

Green River Track Plan

Module Photograph

Photograph of Module Bottom

Green River Bottom View

Photograph of Train Speedometer Installation

   Green River Bottom View

The photograph of the bottom shows the readout mounted in the module's fascia, and connected by multiple wires to the TrainSpeed circuit board. The multi-wire cable connects the circuit board to the two optical sensors mounted in the track base. The TrainSpeed circuit board is powered from the 15VAC Accessory Bus via a protecting fuse and a diode bridge, shown in the right half of the photo.

Module Description

Green River Wyoming is located in the south west corner of the state. The River has been the drawing point for early settlers and has served as a transportation hub for the Overland Trail, Cherokee Trail, Lincoln Highway, Union Pacific Transcontinental Railroad, and Interstate 80. Green River is a major Division point on the Union Pacific Railroad between Omaha, NE and Ogden, UT. Nearby mines provide two-thirds of the world’s supply of soda ash (trona), an essential ingredient of baking soda, detergents and glass, and the area has extensive reserves of shale and natural gas. The population is about 12,000.

With all of the grandeur of UP’s Overland route, the highlight of it all might very well be the segment of track known as the Evanston Sub, which runs west from Green River to Ogden. Westbound trains are in the midst of their grueling climb across the Rockies, and it is this portion of track that gave rise to the biggest steam and diesel locomotives that the Union Pacific is so famous for. The Big Boys and Challengers, Gas turbines and Centennials, all were created with one main focus, getting the freight across the Overland Route and fast!

The Green River Module consists of a quad 15” deep T-TRAK module, constructed by NRMRC member Dave Thompson, featuring the two-track Union Pacific mainline, and represents the UP Division Point at Green River although significantly compressed in size. Both the classification yard for freight cars and the locomotive service facilities are modeled, as is a very compressed model of station facilities at Green River. The module extends 1" to the front to provide for a full Red track siding.

The module is equipped with a TDP & Associates, Inc. (now TCS) TrainSpeed™ Speedometer which measures the speed in N scale miles-per-hour of trains passing on the Red track, the second track back from the front of the module. The display readout is on the front side of the module in the center, with appropriate signage.

Main line turnouts are Unitrack #6 turnouts with Unitrack #4 turnouts in the yard and locomotive service facilities. The #4 turnouts have been "tuned" to ensure reliable operation.

All Unitrack turnouts on the module are controlled by Digitrax DCC Accessory Decoders (DS51K1 and DS64) which receive their DCC input from the Red Track. Thus this module can be used in layouts only where the Red Track is DCC powered. The Yellow Track and all tracks to the rear of the Yellow Track can be DC or DCC as required, although DCC is highly recommended. The Red and Yellow tracks are completely electrically isolated. The turnouts can be operated manually by their slide levers as well as from DCC throttles and the Green River JMRI PanelPro panel.

If one track is DCC powered and the other track is DC powered the crossover capabilities of Unitrack double crossover turnout cannot be used due to the incompatible power feeds to the red and yellow tracks.


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T-TRAK Module: North Pole

Owner Name:

John M Wallis

Status:

Track & wiring complete. Scenery underway

Date Built:

2016 - 2020

Certification:

Not certified

Module Type:

Inside Corner

Width:

22" x 14"

Depth:

22" x 14"

Passing Sidings:

None

Other Tracks:

None

Industrial Spurs:

None

Yard Tracks:

None

Engine Service:

None

Crossovers:

None

Electrical:

Track Feeders:

Yes

Turnout Control:

Digitrax DS52 accessory decoders. Powered from Red track.

Accessory Bus

Yes

Other:

Special:

 

Packaging for Transport:

Solo

Track Plan

Module Photograph

Description
North Pole is a snowytree-filled Christmas scene with chapel, refreshements and flashing Christmas-related signs.


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Last updated: Friday April 17, 2020

 

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