Denver & Rio Grande 4-4-0 "American" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 37 (Locobase 1451)

Data from http://www.sound.net/~drgw/history/drg2.htm . See also DeGolyer, Volume 7, p. 237. Works numbers 3867, 3869, 3871 in April 1876.

Similar to the Class 40 Mogul, but with a higher-pressure boiler and tall drivers (3'8"). Retired in 1888.

Specifications by Steve Llanso of Sweat House Media
Class37
Locobase ID1451
RailroadDenver & Rio Grande (D&RGW)
CountryUSA
Whyte4-4-0
Number in Class3
Road Numbers16-18
Gauge3'
Number Built3
BuilderBurnham, Parry, Williams & Co
Year1876
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.17 / 2.19
Engine Wheelbase (ft / m)18.25 / 5.56
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)37,000 / 16,783
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1118
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)5485 / 2487.96
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 7.80 / 0.72
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1170
Same as above plus superheater percentage1170
Same as above but substitute firebox area for grate area
Power L1
Power MT

Reference