New Haven 2-8-2 "Mikado" Type Locomotives

Introduction

In 1904 the New York, New Haven and Hartford Railroad acquired control of the CNE, but continued to operate it separately. The railroad ran from Hartford, Connecticut and Springfield, Massachusetts west across northern Connecticut and across the Hudson River on the Poughkeepsie Bridge to Maybrook, New York. On January 1, 1927 the CNE was finally merged into the New York, New Haven and Hartford Railroad, ending its independent operation.

The Central New England Railway bought and operated over 200 steam locomotives during it time as an independent line but only bought three "Mikado" type locomotives. The trio was bought from the American Locomotive Company in 1916 and given road numbers 180 through 182.

These locomotives had 63" diameter drivers, 26" x 32" cylinders, a 200 psi boiler pressure, they exerted 58,372 pounds of tractive effort and each weighed 309,600 pounds. The fire box was 321 square feet, the evaporative heating surface was 3,864 square feet and with the superheater the combined heating surface was 4,734 square feet.

There are no surviving CNE 2-8-2 "Mikado" type locomotives.

Roster by Richard Duley

Qty.Road NumbersYear BuiltBuilderNotes
3180-1821916ALCO1
Notes:
  1. Numbers 180-182 were conveyed to the NYNH&H after the CNE was acquired in 1927. They became NYNH&H numbers 3105-3107 and then scrapped in 1946.

Class Details by Steve Llanso

Class J-1 (Locobase 9718)

Data from table in May 1916 issue of RME and from NH 1962 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The diagrams tell us that the firebox heating surface iincluded 59 sq ft in the combustion chamber and 69 sq ft in 3 thermic syphons (2 in the firebox, 1 in the combustion chamber). Maximum water evaporation was calculated to be 41,175 lb/hour of which about 40% came from the direct heating surfaces. Theoretical steam consumption could exceed boiler capacity, reaching 42,160 lb/hour and generating a boiler factor of 97.7%

According to Drury (1993), these locomotives had a low maximum height in order to serve the Dorchester branch to the Readville Yard in eastern Massachusetts. He offers an amusing comment about the tenders: "A freshly coaled J-1 was likely to have a coal pile towering over the cab, at least as far as the first bridge on the Dorchester Branch."

Class J-2 (Locobase 1386)

Data from table in May 1916 issue of RME and from NH 1962 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The diagrams tell us that the firebox heating surface iincluded 28 sq ft in 4 arch tubes and 71 sq ft in the combustion chamber. Each of this octet had a total boiler capacity about 25% greater than the J-1s described in Locobase 9781. A J-2's maximum evaporation capacity was calculated at 51,740 lb/hour, of which 17,660 lb/hour (34.1%) came from direct heating surfaces. As theoretical steam consumption reached 50,630 lb/hour, the boiler factor worked to 102.3%

These engines weren't fitted with a mechanical stoker (although they did have a horizontal coal pusher in the tender), which meant that they soon fell into yard or hill-pushing service.


Specifications by Steve Llanso
ClassJ-1J-2
Locobase ID9718 1386
RailroadNew Haven (NYNH&H)New Haven (NYNH&H)
Whyte2-8-22-8-2
Road Numbers3000-30243100-3107
GaugeStdStd
BuilderAlco-SchenectadyAlco-Schenectady
Year19161916
Valve GearBakerBaker
Locomotive Length and Weight
Driver Wheelbase17'17'
Engine Wheelbase35.33'35.33'
Ratio of driving wheelbase to overall engine wheebase 0.48 0.48
Overall Wheelbase (engine & tender)64.12'72'
Axle Loading (Maximum Weight per Axle)47100 lbs60700 lbs
Weight on Drivers185850 lbs241000 lbs
Engine Weight251750 lbs309600 lbs
Tender Light Weight156000 lbs180500 lbs
Total Engine and Tender Weight407750 lbs490100 lbs
Tender Water Capacity7500 gals8000 gals
Tender Fuel Capacity (oil/coal)13 tons12.5 tons
Minimum weight of rail (calculated) on which locomotive could run77 lb/yard100 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"63"
Boiler Pressure200 psi200 psi
Cylinders (dia x stroke)25" x 30"26" x 32"
Tractive Effort50595 lbs58372 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.67 4.13
Heating Ability
Firebox Area298 sq. ft321 sq. ft
Grate Area53.20 sq. ft59.20 sq. ft
Evaporative Heating Surface2871 sq. ft3864 sq. ft
Superheating Surface656 sq. ft870 sq. ft
Combined Heating Surface3527 sq. ft4734 sq. ft
Evaporative Heating Surface/Cylinder Volume168.44196.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1064011840
Same as above plus superheater percentage1266213971
Same as above but substitute firebox area for grate area7092475756
Power L11264714203
Power MT600.09519.70

Credits

Introduction and roster provided by Richard Duley. Class details and specifications provided by Steve Llanso of Sweat House Media.