"Diagrams [of] Locomotives and 'Passports' [sic], published in Moskva (Moscow), 1935 pp. 40-41, PDF supplied by Teemu Koivmaki in his 5 October 2019. (Many thanks to Teemu for sending what might never have fallen into Locobase's hands. An indispensable addition to Locobase's library.)
Originally oil burners, converted to coal in 1930. Designed by Vazlav Lopushinski. Piston valve diameter measured 250 mm (9.84 in).
16 built for Caucasian in 1915-1918, 48 more for Moscow-Leningrad in 1923-1926. Later moved back south and thence to Ordshonikidze region. In 1947 redesignated Lp (Lopushinsky - built at Putilov.) Not as economical as 2-6-2.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | L |
| Locobase ID | 735 |
| Railroad | |
| Country | Russia |
| Whyte | 4-6-2 |
| Number in Class | 64 |
| Road Numbers | 101-166 |
| Gauge | 5' |
| Number Built | 64 |
| Builder | Putilov |
| Year | 1914 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | / 3.96 |
| Engine Wheelbase (ft / m) | / 11.51 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 38,140 / 17,300 |
| Weight on Drivers (lbs / kg) | 114,420 / 51,900 |
| Engine Weight (lbs / kg) | 213,187 / 96,700 |
| 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) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 72.40 / 1840 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.11" x 25.59" / 460x650 (4) |
| Tractive Effort (lbs / kg) | 34,290 / 15553.70 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.34 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 184 - 2.126" / 54 |
| Flues (number - dia) (in / mm) | 36 - 5.236" / 133 |
| Flue/Tube length (ft / m) | 17.55 / 5.35 |
| Firebox Area (sq ft / m2) | 189.45 / 17.60 |
| Grate Area (sq ft / m2) | 50.05 / 4.65 |
| Evaporative Heating Surface (sq ft / m2) | 2902 / 269.60 |
| Superheating Surface (sq ft / m2) | 920 / 85.50 |
| Combined Heating Surface (sq ft / m2) | 3822 / 355.10 |
| Evaporative Heating Surface/Cylinder Volume | 190.19 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8709 |
| Same as above plus superheater percentage | 10,799 |
| Same as above but substitute firebox area for grate area | 40,876 |
| Power L1 | 16,690 |
| Power MT | 964.74 |