Data from table entitled "Table of Dimensions of the Locomotives" in New England Association of Railway Superintendents, Report of the Trials of Locomotive Engines Made Upon 1st and 2nd October, 1851 (Boston: B J Yerrinton, Printers, 1852), p. 16.
In the test, the Essex took more than 3 additional minutes to cover the 9-mile trial distance than did the Western's Addison Gilmore (Locobase 13519).
The O & LC would eventually merge with the Rutland.
NB: Boiler pressure and tube length both represent estimates.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | St Clair |
| Locobase ID | 13549 |
| Railroad | Ogdensburg & Lake Champlain |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 20 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Essex Company |
| Year | 1851 |
| Valve Gear | V-hook |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 48,650 / 22,067 |
| 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) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 115 / 520 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 8146 / 3694.97 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 153 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.92 / 3.02 |
| Firebox Area (sq ft / m2) | 66.10 / 6.14 |
| Grate Area (sq ft / m2) | 10.75 / 1 |
| Evaporative Heating Surface (sq ft / m2) | 760 / 70.61 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 760 / 70.61 |
| Evaporative Heating Surface/Cylinder Volume | 185.82 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1236 |
| Same as above plus superheater percentage | 1236 |
| Same as above but substitute firebox area for grate area | 7602 |
| Power L1 | 2760 |
| Power MT | |