Interstate 2-8-8-2 "Chesapeake" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 20 (Locobase 6441)
Data based on [
] (visited 26 December 2004). Works numbers were 64996-64997 in November 1923.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 20 |
| Locobase ID | 6441 |
| Railroad | Interstate (IRR) |
| Country | USA |
| Whyte | 2-8-8-2 |
| Number in Class | 2 |
| Road Numbers | 20-21 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Alco-Brooks |
| Year | 1923 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 31.50 / 9.60 |
| Engine Wheelbase (ft / m) | 58 / 17.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.54 |
| Overall Wheelbase (engine & tender) (ft / m) | 94.25 / 28.73 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 62,000 / 28,123 |
| Weight on Drivers (lbs / kg) | 486,500 / 220,673 |
| Engine Weight (lbs / kg) | 541,000 / 245,394 |
| Tender Loaded Weight (lbs / kg) | 209,200 / 94,892 |
| Total Engine and Tender Weight (lbs / kg) | 750,200 / 340,286 |
| Tender Water Capacity (gals / ML) | 12,000 / 45.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 16 / 15 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 101 / 50.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57 / 1448 |
| Boiler Pressure (psi / kPa) | 240 / 16.50 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 25" x 32" / 635x813 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 39" x 32" / 991x813 |
| Tractive Effort (lbs / kg) | 101,465 / 46023.80 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.79 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 96.50 / 8.97 |
| 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 | 23,160 |
| Same as above plus superheater percentage | 23,160 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |