1© Transportation Technology Center, Inc., a subsidiary of the Association of American Railroads, 2015

®

Section 4 - 4-Axle Vehicle

NUCARS® Training Class

4-AxleVehicle p2© TTCI/AAR, 2015®

ObjectiveTo model a 4 axle locomotive in basic terms while learning to work with NUCARS as an integrated system of files and concepts

4-AxleVehicle p3© TTCI/AAR, 2015®

Carbody

Bolster

Wheel/RailRail

Wheel/

Rail

Track Suspension

Axle

Truck suspension

Truck suspension

Side Frame

Track Suspension

4 Axle Vehicle Model

4-AxleVehicle p4© TTCI/AAR, 2015®

5

1

4

Body Numbers

Carbody

Bolster

Wheel/RailRail

Wheel/

Rail

Track Suspension

Axle

Truck suspension

Truck suspension

Side Frame

Track Suspension

8

32

6

7

9 10 11

Z

X

Y

+

4-AxleVehicle p5© TTCI/AAR, 2015®

CarbodyX

Y

Z

Vertical (3)

Lateral

(2)

Roll (4)

Pitch (5)

Yaw (6)

1. Longitudinal2. Lateral3. Vertical4. Roll5. Pitch6. Yaw

Car Body

Longitudinal (1)

4-AxleVehicle p6© TTCI/AAR, 2015®

Bolster

Z

X

Y

Lateral

Vertical

Roll

Yaw

(4)

(6)

(3)

(2)

Pitch (5)

Bolster

Longitudinal (1)

1. Longitudinal2. Lateral3. Vertical4. Roll5. Pitch6. Yaw

4-AxleVehicle p7© TTCI/AAR, 2015®

Side Frame

Y

X

Z

Lateral

Vertical

Longitudinal

Pitch

Yaw (6)

(3)

(1)

(2)(5)

Roll(4)

Side Frames1. Longitudinal2. Lateral3. Vertical4. Roll5. Pitch6. Yaw

4-AxleVehicle p8© TTCI/AAR, 2015®

1. Longitudinal2. Lateral3. Vertical4. Roll5. Pitch6. Yaw

Axle

X

Y

Z

Lateral

Vertical

YawRoll (4)(6)

(3)

(2)

Longitudinal (1)

Axles

4-AxleVehicle p9© TTCI/AAR, 2015®

136 Pound Rail, 1:40 Cant

AAR 1B Narrow Flange

Wheel/Rail Connection

4-AxleVehicle p10© TTCI/AAR, 2015®

Axle

Track

Axle and track connected by a vertical spring which allows lift off

Axle to Track Connection

4-AxleVehicle p11© TTCI/AAR, 2015®

4-AxleVehicle p12© TTCI/AAR, 2015®

EMD GP-style truck

Traction motor mount

SwingHanger with

Leaf orRubber

Suspensions

4-AxleVehicle p13© TTCI/AAR, 2015®

NUCARS Connections

4-AxleVehicle p14© TTCI/AAR, 2015®

NUCARS Element

4-AxleVehicle p15© TTCI/AAR, 2015®

MOff Axis

Type 1 On and Off Axis Connections

Off AxisOn Axis

Type of Connections – Type 1

4-AxleVehicle p16© TTCI/AAR, 2015®