The Williams Valley Railway was a 7.2-mile short line based in Lykens, Pa that hauled coal and general freight. Never very prosperous, it ran deficits throughout most of its independent existence. This mogul may have been its only locomotive. The Philadelphia & Reading took over the WV in 1908-1909 and gave the A F Baker road number 1460. It was scrapped in June 1916.
Prince explains the original 2-4-2 (see Locobase 8879) that was modified into this unusual Mogul "...was frequently shopped on account of broken frames and cylinders." The overhaul resulted in this express engine whose drivers were six inches taller than any other of the 2-6-0s in Locobase. Eight more of the original class
Unlike most Moguls, 303 did not have its pony truck equalized with the drivers, instead having its weight borne by a cast-iron bed plate. The boiler was modified by removing the combustion chamber (which increased tube length by 40.34 inches) and the water-bar grate; the latter was replaced by shaking grates.
The boiler's centerline also was raised to allow the third driving axle to pass under the firebox.
Four of the rebuilds were scrapped in December 1906, another in May 1908.
The other 4 underwent a further transformation as L-6a class 4-6-0s; driver diameter was probably reduced to 68". In only one instance did an engine survive past 1911: 682 (now 315) was rebuilt again as a 4-6-0 (class L-6b) and operated until 1927.
|Specifications by Steve Llanso of Sweat House Media|
|Class||A F Baker||N4-a|
|Railroad||Williams Valley (P & R)||Philadelphia & Reading|
|Number in Class||4||9|
|Builder||Burnham, Williams & Co||Reading|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||12.50 / 3.81||14.33 / 4.37|
|Engine Wheelbase (ft / m)||19.75 / 6.02||23.67 / 7.21|
|Ratio of driving wheelbase to overall engine wheebase||0.63||0.61|
|Overall Wheelbase (engine & tender) (ft / m)|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||76,000 / 34,473||131,400 / 59,602|
|Engine Weight (lbs / kg)||91,000 / 41,277||159,300 / 72,257|
|Tender Loaded Weight (lbs / kg)||159,300 / 72,257|
|Total Engine and Tender Weight (lbs / kg)||318,600 / 144,514|
|Tender Water Capacity (gals / ML)||3000 / 11.36|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||42 / 21||73 / 36.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||54 / 1372||78 / 1981|
|Boiler Pressure (psi / kPa)||140 / 9.70||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||18" x 24" / 457x610||20" x 26" / 508x660|
|Tractive Effort (lbs / kg)||17,136 / 7772.77||22,667 / 10281.59|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.44||5.80|
|Firebox Area (sq ft / m2)||123.50 / 11.48||137 / 12.73|
|Grate Area (sq ft / m2)||25.70 / 2.39||76 / 7.06|
|Evaporative Heating Surface (sq ft / m2)||1189 / 110.50||1765 / 164.03|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||1189 / 110.50||1765 / 164.03|
|Evaporative Heating Surface/Cylinder Volume||168.21||186.70|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||3598||15,200|
|Same as above plus superheater percentage||3598||15,200|
|Same as above but substitute firebox area for grate area||17,290||27,400|