Denver, South Park and Pacific Railroad
DSP&P Mason Bogie 2-8-6T
Locomotives
The Mason Machine
Works was founded in 1842 by William Mason of Taunton, MA.-Mason
built stationary engines, locomotives, and cotton machinery.
Mason's innovative locomotive designs quickly drew praise from
railroad engineers and operators, and were known to be the
easiest engines to repair. The company constructed 754 steam
locomotives between 1853 and 1889. However, after Mason's death
in 1883, the firm concentrated on its core business of textile
machinery.
Although his plant produced many well known conventional
locomotives, he is often better known for his adaptation of the Fairlie style articulated locomotive, which became known as the
Mason Bogie, or Double-Truck locomotive. His design placed the
driving wheels on an articulated frame under the boiler that
allowed it to swivel on sharp curves. The fuel and water tender
was on the engines main frame, carried by a six-wheel truck. The
south Park purchased 23 of the 147 Bogie locomotives built by
Mason. The Forney locomotive looked similar but most Forney's
were not articulated.
This page covers the DSP&P 2-8-6T Mason Bogies. They also owned
19 of the 2-6-6T model.
DSP&P RR LOCOMOTIVES 1874 - 1899 |
ORIG # |
NAME |
1885 #, C&S # |
TYPE |
MFG |
BUILT |
25 |
Alpine |
240 |
2-8-6T |
Mason |
1880 |
26 |
Rico |
241 |
2-8-6T |
Mason |
1880 |
27 |
Roaring Fork |
242 |
2-8-6T |
Mason |
1880 |
28 |
Denver |
243 |
2-8-6T |
Mason |
1880 |
HISTORY
DSP&P #25 through
#28 arrived in 1880 and were gone by 1894. The latter two had larger
cylinders than the first two. All are reported to weigh in at 46
tons with 45" boiler diameter, and had 36" drivers as opposed to the
37" on the 2-6-6T models.
PHOTO GALLERY
Mason Bogie 2-8-6T "Denver" at the Mason plant in 1880
FOLIOS and PLANS
Two page advertisement?? moumted on cardstock,
source unknown, possibly Railway Age or Railway Gazette, origial
pages about 9" x 7", showing plans and specifications for DSP&P 2-8-6T Mason Bogies #25 through #28. (From the author's
collection).
DSP&P 2-8-6T Mason Bogie #28
"Denver"
DSP&P
2-8-6T Mason Bogie #28 "Denver" Page 1
DSP&P
2-8-6T Mason Bogie #28 "Denver" Page 2
DSP&P
2-8-6T Mason Bogie #28 "Denver" Page 3
DSP&P 2-8-6T Mason Bogie #28 "Denver"