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Finnish Railway series K5 “Pikku-Jumbo”
The K5, also called “Pikku-Jumbo” (“Small Jumbo”), was the largest class of steam locomotives ever in use with the Finnish State Railways. It is also known by its new class designation Tk3 introduced in 1942. It was a...
| Finnish Railway series K5 “Pikku-Jumbo”Remove | |
|---|---|
| Variant | Standard |
| Built | 1927-1930, 1943-1948, 1953 |
| Manufacturers | Tampella;Lokomo;Frichs |
| Wheel arrangement | 1D |
| Gauge | 1520 mm |
| Length | 16000 mm |
| Service mass | 51800 kg |
| Top speed | 60 km/h |
| Power | |
| Engine |
General
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Built | 1927-1930, 1943-1948, 1953 |
| Manufacturers | Tampella, Lokomo, Frichs |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,520 mm |
Dimensions and weights
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Length | 16.00 m |
| Wheelbase | 6.98 m |
| Service mass | 51.8 t |
| Adhesion mass | 43 t |
| Total mass | 78.2 t |
| Rigid wheelbase | 4.44 m |
| Axle load | 10.7 t |
| Water capacity | 9,500 l |
| Fuel capacity | 4.5 t (wood) |
Boiler
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Grate area | 1.6 m² |
| Evaporative heating surface | 84.8 m² |
| Superheater surface | 26 m² |
| Total heating surface | 110.8 m² |
Power plant
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Driver diameter | 1,270 mm |
| Boiler pressure | 14 bar |
| Expansion type | simple expansion |
| Cylinders | two, 460 x 630 mm |
Power
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 400 kW (544 PS) |
| Top speed | 60 km/h |
| Starting effort | 124.9 kN |
Calculated values
| Property | Finnish Railway series K5 “Pikku-Jumbo” Standard Remove |
|---|---|
| Factor of adhesion | 1 : 3.38 |
| Optimal speed | 19 km/h |
| Power-to-weight ratio | 7.7 kW/t |
| Adhesive weight/Total | 1 : 1.20 |
| Tractive force/Heating surface | 1 : 23.55 |
| Grate area/Heating surface | 1 : 69.25 |
| Total/Superheater | 1 : 3.26 |
