Little River Other Articulated Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 148 (Locobase 4070)
See [
] and DeGolyer, Volume 33, p. 17. See also the Little River Baldwin site's description of the 148 at [], last accessed 7 May 2016. Works number was 34088 in November 1909.
The design was rated at 200 tons up a 2 1/2% grade (1 in 40). According to the December 1967 Industrial Railway Record (No 15), two significant design limitations were the requirement to negotiate 160-ft radius curves and the light, 56-lb/yard (28-kg/metre) track.
Little River site says that this 1909 engine reflected design changes inspired by the experience of operating the first Atlantic Mallet described in Locobase 4069. The 148 stayed with the LRR (Townsend, TN) logging railroad for its entire working career, which ended in 1940.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 148 |
| Locobase ID | 4070 |
| Railroad | Little River |
| Country | USA |
| Whyte | 2-4-4-2 |
| Number in Class | 1 |
| Road Numbers | 148 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1910 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 32 / 9.75 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.31 |
| Overall Wheelbase (engine & tender) (ft / m) | 54.54 / 16.62 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 106,000 / 48,081 |
| Engine Weight (lbs / kg) | 136,000 / 61,689 |
| Tender Loaded Weight (lbs / kg) | 72,000 / 32,659 |
| Total Engine and Tender Weight (lbs / kg) | 208,000 / 94,348 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1500 / 5678 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 22" / 356x559 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 21" x 22" / 533x559 |
| Tractive Effort (lbs / kg) | 23,068 / 10463.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.60 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 170 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 16 / 4.88 |
| Firebox Area (sq ft / m2) | 101 / 9.38 |
| Grate Area (sq ft / m2) | 21.50 / 2 |
| Evaporative Heating Surface (sq ft / m2) | 1518 / 141.08 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1518 / 141.08 |
| Evaporative Heating Surface/Cylinder Volume | 387.18 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4300 |
| Same as above plus superheater percentage | 4300 |
| Same as above but substitute firebox area for grate area | 20,200 |
| Power L1 | 3364 |
| Power MT | 279.86 |