Data from P C D [P C Dewhurst?], "The Midland and Great Northern Joint Railway and its Locomotives", Locomotive Magazine, Volume 27 (15 April 1921), pp. 108. Works number was 416 in 1877.
The first of the two saddle-tanks from the Newcastle firm bore the name of the daughter of the Y&NN's chairman. The class had bigger boilers than the contemporaneous engines shown in Locobase 20872. Compared to those earlier locomotives, the Ida and a later sister had almost no domes at all.
The Y&NN merged with other railways to form the Eastern & Midlands in 1883, which was reorganized as the Midland & Great Northern Joint Railway in 1893. "Ida" took road number 7a, but was discarded soon after.
In 1880, Black, Hawthorn sent another pair to the two cooperating railways that would be taken over by the Eastern & Midlands in 1883. "Holt" (works number 503) was delivered to the Lynn & Fakenham; it was later renamed "Chairman". Renumbered 6 by the E&M and later renumbered 6a, this engine too went north to serve a colliery.
Y&NN took "Aylsham" (works number 517), placing it at the head of pasenger trains between Yarmouth and Stalham (17 3/4 miles/28.6 km), later working as far as Melton Constable. Givne E&M number 17, the engine later gave up that number and, as 17a, worked as a yard engine.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | Ida |
Locobase ID | 20873 |
Railroad | Yarmouth & North Norfolk |
Country | Great Britain |
Whyte | 0-6-0ST |
Number in Class | 2 |
Road Numbers | 6a-7a |
Gauge | Std |
Number Built | 2 |
Builder | Black, Hawthorn |
Year | 1877 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 10.75 / 3.28 |
Engine Wheelbase (ft / m) | 10.75 / 3.28 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 10.75 / 3.28 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 58,240 / 26,417 |
Engine Weight (lbs / kg) | 58,240 / 26,417 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 798 / 3.02 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 40.50 / 1029 |
Boiler Pressure (psi / kPa) | 140 / 970 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
Tractive Effort (lbs / kg) | 11,518 / 5224.48 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.06 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 49.50 / 4.60 |
Grate Area (sq ft / m2) | 8.50 / 0.79 |
Evaporative Heating Surface (sq ft / m2) | 556 / 51.65 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 556 / 51.65 |
Evaporative Heating Surface/Cylinder Volume | 156.03 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1190 |
Same as above plus superheater percentage | 1190 |
Same as above but substitute firebox area for grate area | 6930 |
Power L1 | 2131 |
Power MT | 242.00 |