Petersburg 2-2-0 "Planet" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Pioneer (Locobase 4089)

Although laid out along Stephenson multi-tube boiler lines, Railroad Gazette of 12 April 1901 comments that " the design was inferior to even earlier engines by Stephenson and Bury." The locomotive showed the D-shaped Bury firebox behind the single driving axle and inside cylinders driving the rear axle. The attribution to the Petersburg (later part of the RF&P) as owning railroad constitutes a bit of deductive reasoning by Herbert T. Walker, author of the RG article.

Specifications by Steve Llanso of Sweat House Media
Locobase ID4089
Number in Class1
Road Numbers
Number Built1
BuilderRothwell, Hick & Rothwell
Valve Gear
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers
Engine Weight
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)0
Geometry Relating to Tractive Effort
Driver Diameter54"
Boiler Pressure40 psi
Cylinders (dia x stroke)9" x 18"
Tractive Effort918 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area
Grate Area
Evaporative Heating Surface150 sq. ft
Superheating Surface
Combined Heating Surface150 sq. ft
Evaporative Heating Surface/Cylinder Volume113.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation0
Same as above plus superheater percentage0
Same as above but substitute firebox area for grate area0
Power L10
Power MT

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