Data from DeGolyer, Volume 29, p. 115 and Volume 30, p.193. Works numbers were 28450 in June 1906; 30268-30269 in February 1907; 30416-30418, 30424 in March; 31502-31504, 31522, 31550-31551 in August.
This Ten-wheeler design had one of the lowest heating surface-firebox ratios in a conventional boiler because of the short tubes laid ahead of the spacious Wootten firebox.
As the class was withdrawn beginning in the 1920s, three of them went to the Middletown & Unionville. The M & U had succeeded to the property of the Middletown, Unionville & Water Gap railroad in 1913. It was a 14.5 bridge line in that straddled the New Jersey-New York border and survived for 30 years on agricultural and coal traffic, with some passenger service mixed in. In 1919, it was reported to have amassed over 500,000 passenger miles and taken in $15,601 in passenger revenue. Freight revenue was nearly 4 times as great on 651,617 ton-miles of traffic.
The 23 was sold to the shortline on 1 October 1922 and sold off the property on 30 December 1930. 33 had the shortest second career - the M & U bought the engine on 1 September 1924 and sold it on 1 December 1927. 32 had arrived on the M & U only 3 months earlier as a result of a 1 September 1927 purchase. It would be sold on the same day as the 23.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 20 |
| Locobase ID | 12980 |
| Railroad | Lehigh & Hudson River |
| Country | USA |
| Whyte | 4-6-0 |
| Number in Class | 13 |
| Road Numbers | 20, 23-34 |
| Gauge | Std |
| Number Built | 13 |
| Builder | Burnham, Williams & Co |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 22.92 / 6.99 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 51 / 15.54 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 115,000 / 52,163 |
| Engine Weight (lbs / kg) | 146,000 / 66,225 |
| Tender Loaded Weight (lbs / kg) | 72,000 / 32,659 |
| Total Engine and Tender Weight (lbs / kg) | 218,000 / 98,884 |
| Tender Water Capacity (gals / ML) | 3600 / 13.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 64 / 1626 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 26" / 533x660 |
| Tractive Effort (lbs / kg) | 30,457 / 13815.08 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.78 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 248 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.08 / 3.99 |
| Firebox Area (sq ft / m2) | 174 / 16.17 |
| Grate Area (sq ft / m2) | 81.60 / 7.58 |
| Evaporative Heating Surface (sq ft / m2) | 1862 / 173.05 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1862 / 173.05 |
| Evaporative Heating Surface/Cylinder Volume | 178.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 16,320 |
| Same as above plus superheater percentage | 16,320 |
| Same as above but substitute firebox area for grate area | 34,800 |
| Power L1 | 5593 |
| Power MT | 321.66 |