Surprisingly small Ten-wheeler for a branch of the St Paul & Sioux City that was originally built to forestall the construction of the Southern Minnesota line then planned for the same area. The little 4-6-0 may have been ordered by the Worthington & Sioux Falls as the #1, but the spec sheet in the DeGolyerRaildata collection shows that it was delivered to the O&NN.
In its career, the 2 was lettered for the Worthington & Dakota (1876), the Omaha & Northwestern (#2), St Paul & Sioux City (#50), and ultimately by the successor Chicago, Saint Paul, Minneapolis & Omaha (250).
At the same time Baldwin delivered 63"" mixed-traffic Eight-wheelers (Locobase 9301) locomotives to the WW, the builder supplied this quartet of freight engines that duplicated the order except for the smaller drivers.
Still on the small side, these Eight-wheelers had typical power dimensions for the time; they were delivered with 144 tubes. Their driver size equated to freight hauling.
Taken into the Omaha Road when the StP & SC taken over, most engines in this class were scrapped at the end of the first decade of the 20th Century.
Delivered to the NW from Pittsburgh as the latter's works #387. Ultimately this small Ten-wheeler was rebuilt as an 0-6-0 switcher.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Omaha & Northern Nebraska (CStPMO)||West Wisconsin (CStPMO)||Sioux City & St Paul (CStPM&O)||Northern Wisconsin (CStPMO)|
|Number in Class||1||2||6||1|
|Road Numbers||2/50/250||17-18||35-36, 39-40, 43-44||1|
|Builder||Burnham, Parry, Williams & Co||M. Baird & Co||Burnham, Parry, Williams & Co||Pittsburgh|
|Locomotive Length and Weight|
|Driver Wheelbase (ft)||12.65||12.50||8||12.50|
|Engine Wheelbase (ft)||23.48||24.25||21.67||24.25|
|Ratio of driving wheelbase to overall engine wheebase||0.54||0.52||0.37||0.52|
|Overall Wheelbase (engine & tender) (ft)||45||46||43.67||46|
|Axle Loading (Maximum Weight per Axle) (lbs)|
|Weight on Drivers (lbs)||54,000||41,000||41,000||45,000|
|Engine Weight (lbs)||72,000||68,000||68,000||70,000|
|Tender Loaded Weight (lbs)||53,000||49,000||49,700||51,000|
|Total Engine and Tender Weight (lbs)||125,000||117,000||117,700||121,000|
|Tender Water Capacity (gals)||2750||2253||2300||2500|
|Tender Fuel Capacity (oil/coal) (gals/tons)||3.50||5||6||6|
|Minimum weight of rail (calculated) (lb/yd)||30||23||23||25|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in)||53||57||58||57|
|Boiler Pressure (psi)||140||140||140||140|
|High Pressure Cylinders (dia x stroke) (in)||17" x 24"||16" x 24"||16" x 24"||16" x 24"|
|Tractive Effort (lbs)||15,573||12,827||12,606||12,827|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.47||3.20||3.25||3.51|
|Firebox Area (sq ft)||98.40||87.50||104.70||97|
|Grate Area (sq ft)||14.30||13.40||15.30||14.80|
|Evaporative Heating Surface (sq ft)||975||887||901||1147|
|Superheating Surface (sq ft)|
|Combined Heating Surface (sq ft)||975||887||901||1147|
|Evaporative Heating Surface/Cylinder Volume||154.64||158.82||161.32||205.37|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2002||1876||2142||2072|
|Same as above plus superheater percentage||2002||1876||2142||2072|
|Same as above but substitute firebox area for grate area||13,776||12,250||14,658||13,580|