Data from "Locomotives of Great Northern Ry, Ireland," The Locomotive Magazine, Vol XI (15 May 1905), p. 80. See also Steamindex's GNR(I) page -- [], last accessed 12 June 2009. Works numbers were 3137-3138.
This pair of radial side tanks first went into service as shunters (switchers) in Belfast, but 99 later went to Dublin. At a relatively late date, the GNR superheated the pair in 1932 and 1935, probably in conjunction with replacing the replacing the original boiler. Steamindex describes the design as "extremely Doncaster looking".
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | QGT |
| Locobase ID | 10506 |
| Railroad | Great Northern |
| Country | Ireland |
| Whyte | 0-6-2T |
| Number in Class | 2 |
| Road Numbers | 98-99 |
| Gauge | 5'3" |
| Number Built | 2 |
| Builder | Robert Stephenson & Co |
| Year | 1904 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16 / 4.88 |
| Engine Wheelbase (ft / m) | 22 / 6.71 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.73 |
| Overall Wheelbase (engine & tender) (ft / m) | 22 / 6.71 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,280 / 16,003 |
| Weight on Drivers (lbs / kg) | 103,040 / 46,738 |
| Engine Weight (lbs / kg) | 123,872 / 56,187 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1500 / 5.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55 / 1397 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 26" / 470x660 |
| Tractive Effort (lbs / kg) | 19,253 / 8733.02 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.35 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 240 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 112.40 / 10.45 |
| Grate Area (sq ft / m2) | 19.93 / 1.85 |
| Evaporative Heating Surface (sq ft / m2) | 1266 / 117.66 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1266 / 117.66 |
| Evaporative Heating Surface/Cylinder Volume | 156.51 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2790 |
| Same as above plus superheater percentage | 2790 |
| Same as above but substitute firebox area for grate area | 15,736 |
| Power L1 | 2900 |
| Power MT | 186.14 |