Stack Extenders for ATSF Steam Engines

Hinged Can

Both the Hinged Can and the telescopic stack were designed to improve draft to the firebox, much like the "elephant ears" on other steam engines. (Evan Werkema)

The hinged can was an additional stack hinged from the top of the fixed stack. There were two variations on these as well.

A. Some were hinged from the front of the stack so they would rest in front of the stack when in the down position.

Engine 3420, Engine 3421

Engine 3425, Engine 3439, Engine 3408

Engines with this style include 3401, 06, 08, 20, 21, 25, 28, 29, 34, 36, 37, 39.

B. Some were hinged from the back of the stack so they would rest behind of the stack when in the down position.

Drawing of 5001, Drawing of 5012

Engine 3753, Engine 5004

Engine 3462 showing activation cylinder. See below for later changes.

Engines with this style include:

3422

3750, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64

5000, 01, 04, 07, 08, 14, 25, 29, 30.