Dierks Lumber & Coal Company 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 226 (Locobase 15340)

Data from DeGolyer, Vol 77, pp. 780+. See also Bernard Reed's entry on Herman Dierks in the Encyclopedia of Arkansas History & Culture, accessed at http://www.encyclopediaofarkansas.net/encyclopedia/entry-detail.aspx?entryID=2498. (Thanks to Chris Hohl for his 24 October 2015 email pointing out the absence of superheater area and supplying the figure.) Works numbers were 60005-60006 in May 1927.

DeQueen, Arkansas-based DL&CC bought these two Mikados for logging operations out of DeQueen (226) and Mountain Pine, Ark (227). They were relatively small engines, especially so for standard-gauge 2-8-2s, and had 8" (203 mm) piston valves.

Unlike several other Baldwin locomotives, these two bore the DL&CC name rather than one of its two subsidiary railroads. The railroads over which the two operated had ruling grades of 3% but were expected to climb 5-6% grades, each about a half mile (0.8 km) long. Both operated for the DL&CC and its corporate successor, Dierks Forests Inc until Weyerhaeuser bought out the company in 1946

226 went on display at the Eureka Springs & North Arkansas Railroad with the goal of restoring it to service. 227 went on display at Broken Bow, Okla.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID15340
RailroadDierks Lumber & Coal Company
Number in Class2
Road Numbers226-227
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.25 / 3.73
Engine Wheelbase (ft / m)27.50 / 8.38
Ratio of driving wheelbase to overall engine wheebase 0.45
Overall Wheelbase (engine & tender) (ft / m)52.54 / 16.01
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)99,000 / 44,906
Engine Weight (lbs / kg)126,000 / 57,153
Tender Loaded Weight (lbs / kg)91,000 / 41,277
Total Engine and Tender Weight (lbs / kg)217,000 / 98,430
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)6 / 5.50
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)24,118 / 10939.75
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.10
Heating Ability
Firebox Area (sq ft / m2)112 / 10.41
Grate Area (sq ft / m2)22.20 / 2.06
Evaporative Heating Surface (sq ft / m2)1189 / 110.46
Superheating Surface (sq ft / m2)258
Combined Heating Surface (sq ft / m2)1447 / 110.46
Evaporative Heating Surface/Cylinder Volume188.58
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3996
Same as above plus superheater percentage4715
Same as above but substitute firebox area for grate area23,789
Power L18523
Power MT759.19

All material Copyright © SteamLocomotive.com
Wes Barris