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.
This locomotive had its boiler pressure measured at 144 psi by the committee overseeing the October 1851 trials. Despite the juiced-up power, this high-drivered engine took almost 2 minutes more to finish the 9-mile course than did its identically named rival (Locobase 13519).
Although the specs didn't include areas, a calculation of tube area shows that this was one of the largest locomotives in the competition. Given that the contestants represented New England railroad practice, Locobase supposes this
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Addison Gilmore |
| Locobase ID | 13551 |
| Railroad | Connecticut & Passumpsic |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Amoskeag |
| 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) | 46,320 / 22,108 |
| 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) | 78 / 1829 |
| Boiler Pressure (psi / kPa) | 124 / 690 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 6919 / 3138.41 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 150 - 2" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11 / 3.02 |
| Firebox Area (sq ft / m2) | / 5.70 |
| Grate Area (sq ft / m2) | / 1 |
| Evaporative Heating Surface (sq ft / m2) | / 64.29 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | / 64.29 |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |