Data from "Inspection Locomotive", Railroad Gazette, Volume 24, No (18 March 1892), p.207. (Many thanks to Chris Hohl for his extensive research and his 3 December 2018 email, spreadsheet, and article link. Chris particularly cites Ron Goldfeder for his article, "The Inspection Locomotive." Railroad History. Spring-Summer 2012. Number 206. pgs. 20 & 32, and further assistance. ) Works number was 3639 in February 1892.
This inspection engine, with its "elegantly furnished" seating for eight ahead of the cab, was built to the order of the A&StL's president William Seward Webb. It was intended to be powerful enough to pull two sleeping cars "at usual speed." Doctor Webb's inspection engine,seated eight persons in the usuall extended car body that stretched from the footplate to just behind the smokebox and stack. Doors on either side of the smokebox improved forward visibility and the occupants could board or debark on steps mounted just ahead of the doors and outboard of the front truck. The locomotive also was expected to pull two sleeping cars "at usual speed". Probably because he was no longer president of the A&StL, which was merged into the New York Central in August 1892, Webb sold the Saint Lawrence to Edward Curtis, president of the Central Vermont. 99 didn't keep its number or its side tanks; see Locobase 16335.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | Saint Lawrence |
| Locobase ID | 16391 |
| Railroad | Adirondack & St Lawrence/Central Vermont |
| Country | USA |
| Whyte | 2-4-6T |
| Number in Class | 1 |
| Road Numbers | 99/109 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Schenectady |
| Year | 1893 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 31.10 / 9.48 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.24 |
| Overall Wheelbase (engine & tender) (ft / m) | 31.10 / 9.48 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 56,700 / 25,719 |
| Engine Weight (lbs / kg) | 134,400 / 60,963 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 134,400 |
| Tender Water Capacity (gals / ML) | 2300 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 160 / 11 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 12,766 / 5790.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.44 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 146 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.58 / 3.53 |
| Firebox Area (sq ft / m2) | 91.77 / 8.53 |
| Grate Area (sq ft / m2) | 14.38 / 1.34 |
| Evaporative Heating Surface (sq ft / m2) | 971 / 90.21 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 971 / 90.21 |
| Evaporative Heating Surface/Cylinder Volume | 189.65 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2301 |
| Same as above plus superheater percentage | 2301 |
| Same as above but substitute firebox area for grate area | 14,683 |
| Power L1 | 4468 |
| Power MT | 347.45 |