Data from J C Milling, "Railways and Locomotives in Denmark," Railway and Locomotive Engineering, April 1899, page 161.
Milling describes this engine as what "...may be called a typical Danish engine ...it is a smart little engine, and does the service required; but it has rather too much cylinder for the size of the boiler."
This quartet was delivered to the SNB with names: Tiselholt, +rkildhus, Nyborg, and Svendborg. In 1924, they were rebuilt by the SFJ, which was the leasing railway. Renumbered 19-22, the class remained in service on the SNB until 1949, when the DSB took over the SNB. The 19-21 were retired in 1952, the 22 in 1954.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Af |
| Locobase ID | 9504 |
| Railroad | Svendborg - Nyborg Banen (SNB) |
| Country | Denmark |
| Whyte | 4-4-0 |
| Number in Class | 4 |
| Road Numbers | 1-4 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Jung |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 19.75 / 6.02 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 39,000 / 17,690 |
| Engine Weight (lbs / kg) | 62,800 / 28,486 |
| Tender Loaded Weight (lbs / kg) | 38,000 / 17,237 |
| Total Engine and Tender Weight (lbs / kg) | 100,800 / 45,723 |
| Tender Water Capacity (gals / ML) | / 6 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 |
| Tractive Effort (lbs / kg) | 10,519 / 4771.34 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.71 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 114 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 74 / 6.88 |
| Grate Area (sq ft / m2) | 13.50 / 1.25 |
| Evaporative Heating Surface (sq ft / m2) | 597 / 55.48 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 597 / 55.48 |
| Evaporative Heating Surface/Cylinder Volume | 132.68 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2025 |
| Same as above plus superheater percentage | 2025 |
| Same as above but substitute firebox area for grate area | 11,100 |
| Power L1 | 3224 |
| Power MT | 364.50 |