Sandy Hook Proving Ground 2-4-0 "Porter" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 5 (Locobase 16267)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 45, p. 144+. See also "Fort Hancock and Sandy Hook Proving Grounds", Military Railroads of the New York Area website at [], last accessed 5 February 2017. (Many thanks to Chris Hohl for his 24 January 2017 email noting the absence of this locomotive from Locobase and supplying a spreadsheet with key data.) Works number was 40217 in July 1913.

Six-wheeler tender locomotives were rarely encountered in US service after the 1840s, but a few found niches. This engine offered more power than the earlier 2-4-4T shown in Locobase 11497. The builder's card photo shown on the comprehensive Military Railroads website shows a short, but well-proportioned standard gauge design. One may think it a bit late in the day to be fitting a capped stack and banded domes to the boiler, but the result is very pleasing.

Eight years after its arrival at Sandy Hook, the 5 was sold to locomotive rebuilder/reseller Birmingham Rail & Locomotive. According to Thomas Lawson's compilation of BR&L records supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange, Roquemore Gravel Company of Montgomery, Ala bought BR&L stock #723 in April 1921 and renumbered it 12.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID16267
RailroadSandy Hook Proving Ground
Number in Class1
Road Numbers5
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29
Engine Wheelbase (ft / m)15.58 / 4.75
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)39.83 / 12.14
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)67,000 / 30,391
Engine Weight (lbs / kg)81,000 / 36,741
Tender Loaded Weight (lbs / kg)44,000 / 19,958
Total Engine and Tender Weight (lbs / kg)125,000 / 56,699
Tender Water Capacity (gals / ML)2000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)56 / 28
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 24" / 381x610
Tractive Effort (lbs / kg)15,300 / 6939.97
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.38
Heating Ability
Tubes (number - dia) (in / mm)172 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)117 / 10.87
Grate Area (sq ft / m2)19.20 / 1.78
Evaporative Heating Surface (sq ft / m2)920 / 85.47
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)920 / 85.47
Evaporative Heating Surface/Cylinder Volume187.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3456
Same as above plus superheater percentage3456
Same as above but substitute firebox area for grate area21,060
Power L14966
Power MT326.81

All material Copyright ©
Wes Barris