Dunkirk / Gilbert Geared Components  

Geared Steam Locomotive Works ©

Home| Baldwin| Bell| Byers| Climax| Davenport| Dewey| Dunkirk| Heisler| Other| Rod| Shay| Willamette|
Books| Search| Videos|

< Dunkirk Main


"V"   arrangement    -  Class "B"  

cylinder-patent-dwg-t150.jpg (9121 bytes)

cylinder-side-patent-dwg-t120.jpg (7334 bytes)

Cross section patent drawing. View from rear of locomotive.


Cut away patent drawing. View from the side.   Note the cylinder location within the cab.

Drivers - Flanges

driver-double-flange-t300.jpg (10099 bytes)

driver-spoked-t320.jpg (3908 bytes)

Double Flange

Note the flange on this side of the wooden rail.

Single Flange


Two types of flanges were utilized: Double and Single.

Double Flange

The concave shaped metal wheels had flanges on both the outside and inside of the wheel itself.  They were used on temporary logging "rail" roads where the rail consisted of two rows of full length tree logs (with the limbs removed)  laid end to end for the entire lengh of the railroad.  The concave wheels   "straddled" and thus rode atop the logs, following the direction in which they were laid.  

Single Flange - Smooth Tire

The single flanged wheels were the type most often associated with locomotive  wheels or drivers.   They were metal wheels with a flange or lip an inch or more deep that ran along the inside (toward the axle) of the wheel.   They were used on the metal rails  most commonly associated with railroads.   The flange forced the wheel to follow the curvature or straightness of the track while also preventing the wheel from "riding" up and jumping over the top of the rail.    Smooth tires were utilized where the rail was steel.


Drivers - Tires

driver-spoked-t320.jpg (3908 bytes)

driver-cleated.jpg (9755 bytes)

Smooth Tire

Cleated Tire

The part of the driver that actually rode atop the rail was the "tire".    Two styles were utilized: Smooth and Cleated.


The smooth tires were utilized where the rail was metal.  This style was the more prevalent of the two.


The metal cleated wheels were designed for temporary logging "rail" roads where the "rail" was long square lengths of wood positioned end to end and usually nailed to a stable surface such as logs laid end to end.  The cleates provided good traction, but was destructive on the wooden rail.


Drivers - Wheels


driver-double-flange-t300.jpg (10099 bytes)

driver-solid-(aberdeen & hazen)-t300.jpg (6969 bytes)



With one known exception, the wheels on the trucks were spoked.  The exception were the solid wheels installed on the Aberdeen & Hazen engine. Wheel counter balances on the wheels  were not utilized.


gear-patent-dwg-t150.jpg (7225 bytes)

truck-t275.jpg (13934 bytes)

Patent drawing showing differential arrangement of truck axle gears used in the Gilbert type locomotives.     Photo of same arrangement as noted at left.


Home| Baldwin| Bell| Byers| Climax| Davenport| Dewey| Dunkirk| Heisler| Other| Rod| Shay| Willamette|
Books| Search| Videos|

Page changed: March 18, 2020 07:33:30 AM