Data from Baldwin Locomotive Works Specification for Engines, 1903, as digitized by the DeGolyer Library of Southern Methodist University Vol 26, p. 220. Works numbers were 23570-23571, 23604, 23611-23612, 23642, 23647 in January 1904; 23663-23665, 23686-23687, 23696-23698 in February.
These were the bread-and-butter passenger local locomotives on the LIRR for about 25 years. The "s" in their designator suggests that the class was later superheated. In any event almost all were scrapped in 1929-1930.
Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899. See also "New Power on the Long Island," Locomotive Engineering, Volume XI, No 5 ( May 1898), p. 228. Works numbers were 2933-2937 in March 1898.
This Eight-wheeler class had an unusually deep firebox that was 11 ft long by 3 1/2 wide; it burned anthracite coal.
Sources give only one locomotive's scrapping date, that of the 78 in October 1925.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | D-56s | D55a |
| Locobase ID | 11508 | 2153 |
| Railroad | Long Island | Long Island |
| Country | USA | USA |
| Whyte | 4-4-0 | 4-4-0 |
| Number in Class | 15 | 5 |
| Road Numbers | 86-100 | 6, 8, 33-34, 42/77-81 |
| Gauge | Std | Std |
| Number Built | 15 | 5 |
| Builder | Burnham, Williams & Co | Brooks |
| Year | 1904 | 1898 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.50 / 2.29 | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 22 / 6.71 | 22 / 6.71 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.34 | 0.34 |
| Overall Wheelbase (engine & tender) (ft / m) | 49.79 / 15.18 | 48.42 / 14.76 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 90,000 / 40,823 | 81,500 / 36,968 |
| Engine Weight (lbs / kg) | 130,000 / 58,967 | 115,000 / 52,163 |
| Tender Loaded Weight (lbs / kg) | 85,000 / 38,555 | |
| Total Engine and Tender Weight (lbs / kg) | 200,000 / 90,718 | |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.50 / 8 | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 75 / 37.50 | 68 / 34 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 68 / 1727 | 67 / 1702 |
| Boiler Pressure (psi / kPa) | 200 / 1380 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 21,660 / 9824.82 | 17,757 / 8054.45 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.16 | 4.59 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 286 - 2" / 51 | 225 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 11.93 / 3.64 | 11.45 / 3.49 |
| Firebox Area (sq ft / m2) | 175 / 16.26 | 160.90 / 14.95 |
| Grate Area (sq ft / m2) | 35.28 / 3.28 | 38.50 / 3.58 |
| Evaporative Heating Surface (sq ft / m2) | 1947 / 180.95 | 1504 / 139.78 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1947 / 180.95 | 1504 / 139.78 |
| Evaporative Heating Surface/Cylinder Volume | 247.08 | 212.73 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 7056 | 6930 |
| Same as above plus superheater percentage | 7056 | 6930 |
| Same as above but substitute firebox area for grate area | 35,000 | 28,962 |
| Power L1 | 8117 | 6563 |
| Power MT | 397.66 | 355.07 |
