Division Point

Steam Locomotive
in HO scale


NP Monad®

Northern Pacific
Class Z-5 2-8-8-4
"Yellowstones"

Designed for the Yellowstone Division's Mandan-to-Glendive run, the first NP "Yellowstone" was in essence a test locomotive built by Alco in 1929. The huge articulated 2-8-8-4 was equipped with all the latest auxilary equipment, a "modern" locomotive. Although problems surfaceed, as they were addressed the NP decided to purchase more copies of the "World's Largest Locomotive" Surprisingly, Baldwin Locomotive Works underbid Alco, and got the order for 11 more Z-5s. All the Z-5s were plagued by breaking front frames and steam leakage and seldom steamed to their capability. All the problems were addressed in a 1941 rebuilding, just in time for World War II, and the heavy work involved.

These were tremdously powerful machines, and regularly hauled 4,000 tons across the Mandan-Glendive at speeds of 25-35 mph. The did their job as planned and did it well.

We at the Division Point felt that the Z-5s would be an interesting follow-on to the Z-7s and Z-8s. As usual, Division Point and Boo-Rim will offer this LIMITED EDITION project in different numbers in early and later versions. Lighting is included and these will be DCC-ready. With a limited number of pieces to be produced, you are well advised to contact your dealer to reserve yours!

Road numbers, versions and delivery projections will be announced soon! Watch this page! We encourage NP fans to contact us with data and comments to assure accurate models. We WILL listen.

NP Z-5 Yellowstone
NP 5003 a-pushin near Muir!

As usual, we are indebted to those folks who publish the information and photos we need. We urge you to buy their books and photos.
  • Northern Pacific Supersteam Era 1925-1945 by Robert L. Frey & Lorenz P. Schrenk (1985, Golden West Books, San Marino, CA)
  • Northern Pacific In Color Vol.1 1949-59 by Doug Nighswonger (2002, Morning Sun Books, Scotch Plains, NJ)
  • Northern Pacific Color Pictorial Volume 1 by Joseph W. Shine (1994, Four Ways West Publications, La Mirada, CA)
  • Articulated Steam Engines of North America Volume 1 by Robert A. LeMassena (1979, Sundance Publications, Silverton, CO)
  • Also, thanks to the NP Historical Societies for preserving the data!

Here's our initial selections:

ALCO-built (1929) Class Z-5 Northern Pacific Road Number 5000
NP #5000 DP-9131 NP Yellowstones: NP Class Z-5 2-8-8-4 (Series 5000-5011), as-delivered number plates, friction bearings
with 48E 21,200-gal,27-ton coal tender
Baldwin-built (1930) Class Z-5 Northern Pacific Road Number 5001-5011
NP #5002 DP-9133 NP Yellowstones: NP Class Z-5 2-8-8-4 (Series 5000-5011), as-delivered number plates, friction bearings
with 48E 21,200-gal,27-ton coal tender
NP #5003 DP-9134 NP Yellowstones: NP Class Z-5 2-8-8-4 (Series 5000-5011), modernized, roller bearings
with 48E 21,200-gal,27-ton coal tender


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Last updated 01-27-2009, Copyright ©2009 by Division Point, Inc. & K+C Johnson Ltd