These were conversions of N-1 2-8-8-2s that entered service between 1927 and 1944.
Firebox had thermic syphon; boiler had exhaust steam injector. They were later converted to K1-sd. when the third, driving axle was fitted with Baldwin cross-balanced Boxpok type drivers. Dynamic load was further decreased through the use of tapered main rods. The locomotives now operated cylinder lubricators and cylinder pressure relief valves. Pennypacker says the goal was a 50-mph top speed.
| Specifications | |
|---|---|
| Class | K1-sa |
| Locobase ID | 83 |
| Railroad | Reading |
| Whyte | 2-10-2 |
| Road Numbers | 3000-3010 |
| Gauge | Std |
| Builder | Reading |
| Year | 1928 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 22' |
| Engine Wheelbase | 42' |
| Ratio of driving wheelbase to overall engine wheebase | 0.52 |
| Overall Wheelbase (engine & tender) | 95.25' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 364000 lbs |
| Engine Weight | 439900 lbs |
| Tender Light Weight | 228160 lbs |
| Total Engine and Tender Weight | 668060 lbs |
| Tender Water Capacity | 12000 gals |
| Tender Fuel Capacity (oil/coal) | 18 tons |
| Minimum weight per yard of rail on which locomotive could run | 121 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 62" |
| Boiler Pressure | 220 psi |
| Cylinders (dia x stroke) | 30.5" x 32" |
| Tractive Effort | 89784 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.05 |
| Heating Ability | |
| Firebox Area | 446 sq. ft |
| Grate Area | 108 sq. ft |
| Evaporative Heating Surface | 5502 |
| Superheating Surface | 1840 |
| Combined Heating Surface | 7342 |
| Evaporative Heating Surface/Cylinder Volume | 203.33 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 23760 |
| Same as above plus superheater percentage | 30888 |
| Same as above but substitute firebox area for grate area | 127556 |
| Power L1 | 20408 |
| Power MT | 618.02 |
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