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 [
] . 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"). 16 was named "Pike", followed by "Greenhorn" and "Spanish Peaks" A spark-arresting diamond stack was not optional.
Given their very small size and low tractive effort , it's small wonder that all three were retired in 1888, twelve years after delivery.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 37 |
| Locobase ID | 1451 |
| Railroad | Denver & Rio Grande (D&RGW) |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 3 |
| Road Numbers | 16-18 |
| Gauge | 3' |
| Number Built | 3 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1876 |
| Valve Gear | Stephenson |
| 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 wheelbase | 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 / Liters/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 / 1030 |
| 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 | |
| Tubes (number - dia) (in / mm) | 106 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.46 / 2.58 |
| 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 Computation | 1170 |
| Same as above plus superheater percentage | 1170 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |