Minneapolis & St Louis 4-4-0 "American" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class D9-24 (Locobase 9020)

Data from M&StL 1934 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 30271-30272 in August 1906.

Serviceable passenger engines for the light-density network operated by the M&StL. Their Stephenson valve gear and slide valves remained unchanged until their retirements in 1937.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassD9-24
Locobase ID9020
RailroadMinneapolis & St Louis (MSL)
CountryUSA
Whyte4-4-0
Number in Class2
Road Numbers115-116/146-147/156-157
GaugeStd
Number Built2
BuilderAlco-Schenectady
Year1906
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.50 / 2.59
Engine Wheelbase (ft / m)23.92 / 7.29
Ratio of driving wheelbase to overall engine wheelbase 0.36
Overall Wheelbase (engine & tender) (ft / m)62.91 / 19.17
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)98,500 / 44,679
Engine Weight (lbs / kg)144,500 / 65,544
Tender Loaded Weight (lbs / kg)124,300 / 56,382
Total Engine and Tender Weight (lbs / kg)268,800 / 121,926
Tender Water Capacity (gals / ML)5500 / 20.83
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)12 / 11
Minimum weight of rail (calculated) (lb/yd / kg/m)82 / 41
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 1753
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)19.5" x 26" / 495x660
Tractive Effort (lbs / kg)24,358 / 11048.62
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.04
Heating Ability
Tubes (number - dia) (in / mm)292 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12 / 3.66
Firebox Area (sq ft / m2)191 / 17.74
Grate Area (sq ft / m2)30.10 / 2.80
Evaporative Heating Surface (sq ft / m2)2007 / 186.45
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2007 / 186.45
Evaporative Heating Surface/Cylinder Volume223.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6020
Same as above plus superheater percentage6020
Same as above but substitute firebox area for grate area38,200
Power L17578
Power MT339.22

All material Copyright © SteamLocomotive.com
Wes Barris