Data from Litt J, 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 Olavia Hokas's Swedish Steam website at [], first accessed 21 January 2006 (most recently 29 April 2018); and Tommy Nilsson's Svenska-lok.se website at Svenska-lok.se, last accessed 5 May 2018. Works number was 1931.
Nilsson's descriptions says that Beyer Peacock delivered a dozen of these small four-coupled leading engines for passenger work. Normally, all of the class would have been discarded well before the SJ acquired a single example in 1948. But the 29 had moved from main-line service to hauling an inspection train and thus was still available.
Within six years, however, the 1821 was scrapped and its boiler sent to the Prins August museum.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | C9 |
| Locobase ID | 20369 |
| Railroad | Bergslagernas (BJ) |
| Country | Sweden |
| Whyte | 0-4-2T |
| Number in Class | 12 |
| Road Numbers | 29/1821 |
| Gauge | Std |
| Number Built | 12 |
| Builder | Beyer, Peacock |
| Year | 1880 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 14.43 / 4.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 30.18 / 9.20 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 25,574 / 11,600 |
| Weight on Drivers (lbs / kg) | 49,163 / 22,300 |
| Engine Weight (lbs / kg) | 64,154 / 29,100 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.20 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 62 / 1575 |
| Boiler Pressure (psi / kPa) | 156.60 / 1080 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 24.02" / 470x610 |
| Tractive Effort (lbs / kg) | 17,650 / 8005.91 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 2.79 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 186 - 1.811" / 46 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.61 / 2.93 |
| Firebox Area (sq ft / m2) | 85.04 / 7.90 |
| Grate Area (sq ft / m2) | 15.07 / 1.40 |
| Evaporative Heating Surface (sq ft / m2) | 869 / 80.70 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 869 / 80.70 |
| Evaporative Heating Surface/Cylinder Volume | 116.29 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2360 |
| Same as above plus superheater percentage | 2360 |
| Same as above but substitute firebox area for grate area | 13,317 |
| Power L1 | 2802 |
| Power MT | 251.30 |