Data from Bogdan Pokropinski, "Die Lokomotiv-Serie Tk dre Lettischen Staatland", Die Museums-Eisenbahn 3/1989, pp. 6-7.
The first three Tks were built by Hohenzollern (works numbers 4635-4637) in 1928. Krupp supplied the next 3 in 1931 (works numbers 1196-1198) at the same time Henschel & Sohn produced 3 more. The others were Latvian-built. Daugavpils and Lepala in Latvia supplied 10 in 1933-1934.
The locomotive's layout included large-diameter leading wheels under the smokebox, the cylinders under the running board between the leading axle and the single powered axle under the firebox. The trailing axle used a Bissel truck and supported the cab and bunker.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Tk |
| Locobase ID | 1304 |
| Railroad | Latvian State Railway |
| Country | Latvia |
| Whyte | 2-2-2T |
| Number in Class | 5 |
| Road Numbers | Tk-233-237 |
| Gauge | 5' |
| Number Built | 5 |
| Builder | several |
| Year | 1929 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| 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) | 34,496 / 15,647 |
| Engine Weight (lbs / kg) | 83,328 / 37,797 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 83,328 / 37,797 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 59.10 / 1500 |
| Boiler Pressure (psi / kPa) | 203.10 / 1400 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12.6" x 20.47" / 320x520 |
| Tractive Effort (lbs / kg) | 9493 / 4305.96 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.63 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 55 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | 26 - 4.173" / 106 |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 11.84 / 1.10 |
| Evaporative Heating Surface (sq ft / m2) | 556 / 51.70 |
| Superheating Surface (sq ft / m2) | 235 / 21.84 |
| Combined Heating Surface (sq ft / m2) | 791 / 73.54 |
| Evaporative Heating Surface/Cylinder Volume | 188.21 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2405 |
| Same as above plus superheater percentage | 3126 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |