| Powertype: | Steam |
| Franz Krull Sk class | |
| Designer: | A. Borsig works, Berlin, Germany |
| Builder: | AS Franz Krull, Tallinn, Estonia |
| Builddate: | 1931-1940 |
| Totalproduction: | 16 |
| Whytetype: | 2-8-0 |
| Uicclass: | 1′D h2 |
| Gauge: | narrow gauge |
| Driverdiameter: | 900frac=8NaNfrac=8 |
| Fueltype: | Oil shale |
| Fuelcap: | 8 tons |
| Watercap: | 6 tons |
| Cylindercount: | Two |
| Cylindersize: | 380x |
| Boilerpressure: | 13sigfig=3NaNsigfig=3 |
| Operator: | Estonian Railways |
| Disposition: | All scrapped, none preserved |
The Franz Krull Sk-class is a class of steam locomotive built by the Franz Krull metal works of Tallinn, Estonia between 1931-1940.[1]
The Sk were narrow-gauged and used oil shale as fuel, since it is the primary energy source in Estonia. A total of 16 units were produced, of which none has survived. The last Sk, Sk-156, was scrapped in 1980 in Beloretsk, Russia, where it was actively used until scrapping.
Built in 1931:
Built in 1935:
Built in 1940:
(During the first Soviet occupation of Estonia, when the factory was renamed "Punane Krull" ("Red Krull"). These locomobiles were decorated by the red star and hammer and stickle figures.)