Stockholm-Vasteras-Bergslagens 2-6-2 Locomotives in Sweden
Class Details by Steve Llanso of Sweat House Media
Class 17 (Locobase 10632)
Data from "Six-Coupled Bogie Tank Locomotive, Great Southern and Western Ry," The Locomotive Magazine, Volume XIII [13] (15 November 1907), p. 204; and Data from "Tank-lok Litt. S7" one of a series of SJ locomotive diagrams archived by Anders Lundbing on [
], last accessed 10 June 2017 (Snabcon AB advertised its tools for mounting RJ45 connectors on bundled cables.) ; and builders' information "SJ Littera S7" in Svenska.lok.se at [], last accessed 20 April 2024.
Thomas George Betts, new locomotive superintendent of this railway, ordered a quartet of fast-accelerating tanks for the SVB's suburban service. It was a modern design with outside constant-lead radial valve gear actuating piston valves; however, the boiler was still not superheated.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 17 |
| Locobase ID | 10632 |
| Railroad | Stockholm-Vasteras-Bergslagens (SWB) |
| Country | Sweden |
| Whyte | 2-6-2T |
| Number in Class | 4 |
| Road Numbers | 17 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Falun |
| Year | 1907 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.14 / 3.70 |
| Engine Wheelbase (ft / m) | 26.57 / 8.10 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.46 |
| Overall Wheelbase (engine & tender) (ft / m) | 26.57 / 8.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 82,321 / 37,340 |
| Engine Weight (lbs / kg) | 118,829 / 53,900 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1848 / 7 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 46 / 23 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 61 / 1550 |
| Boiler Pressure (psi / kPa) | 156.60 / 1080 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.72" x 22.83" / 450x580 |
| Tractive Effort (lbs / kg) | 15,643 / 7095.55 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.26 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 95.80 / 8.90 |
| Grate Area (sq ft / m2) | 18.84 / 1.75 |
| Evaporative Heating Surface (sq ft / m2) | 1076 / 100 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1076 / 100 |
| Evaporative Heating Surface/Cylinder Volume | 165.12 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2950 |
| Same as above plus superheater percentage | 2950 |
| Same as above but substitute firebox area for grate area | 15,002 |
| Power L1 | 3799 |
| Power MT | 305.22 |