Milwaukee Road 4-4-0 "American" Type Locomotives

Class H3 (Locobase 9877)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H3 (Locobase 9873)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H3 (Locobase 9875)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H3 (Locobase 9876)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H4 (Locobase 9878)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H5 (Locobase 9882)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H5 - long pattern (Locobase 9880)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H5 - long pattern (Locobase 9881)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H5 - short pattern (Locobase 9879)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H6 (Locobase 9883)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

This class had many fathers: 10 (original numbers 684-693) from Rhode Island Locomotive Works, 1 from Brooks, 10 from Cooke (721-730), 10 from Grant (works #1723-1731 produced in December 1887, road numbers 731-740).

Class H7 (Locobase 9884)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H7 (Locobase 9886)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Class H8 (Locobase 9874)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Specifications
ClassH3H3H3H3H4H5H5 - long patternH5 - long patternH5 - short patternH6H7H7H8
Locobase ID9877987398759876987898829880988198799883988498869874
RailroadMilwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)Milwaukee Road (CMStP&P)
Whyte4-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-04-4-0
Road Numbers165-17086-99107-108116-124203-231337-343315-404405-408300-314500-530700-717721-730900-908
GaugeStdStdStdStdStdStdStdStdStdStdStdStdStd
BuilderWilliam MasonTauntonPittsburghBurnham, Parry, Williams & CoSchenectadyMilwaukeeRhode IslandManchesterRhode IslandseveralRhode IslandSchenectadyRogers
Year1871187318791880187718931879188218791886188218891904
Valve GearStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 7.25' 7.50'8'8' 8.50' 8.50' 8.50' 8.50' 8.50' 8.50' 8.50' 8.50'8'
Engine Wheelbase21.33'21.50'21.67'21'22.50'22.33'23.25'23.25'22.75'23.25'23.25'23.25'22.83'
Ratio of driving wheelbase to overall engine wheebase 0.34 0.35 0.37 0.38 0.38 0.38 0.37 0.37 0.37 0.37 0.37 0.37 0.35
Overall Wheelbase (engine & tender)43.33'43.50'43.75'44.71'44.87'45.54'45.54'45.04'45.79'45.54'45.96'49.90'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers40400 lbs40000 lbs42800 lbs42750 lbs50000 lbs54000 lbs55000 lbs55000 lbs52100 lbs64000 lbs60000 lbs60000 lbs85600 lbs
Engine Weight66650 lbs65700 lbs72700 lbs68550 lbs81000 lbs86000 lbs85000 lbs85000 lbs81220 lbs100100 lbs94000 lbs97000 lbs131000 lbs
Tender Light Weight55000 lbs55000 lbs52600 lbs60000 lbs60000 lbs68000 lbs60000 lbs60000 lbs60000 lbs78000 lbs60000 lbs78000 lbs112000 lbs
Total Engine and Tender Weight121650 lbs120700 lbs125300 lbs128550 lbs141000 lbs154000 lbs145000 lbs145000 lbs141220 lbs178100 lbs154000 lbs175000 lbs243000 lbs
Tender Water Capacity2000 gals2000 gals3200 gals2000 gals2800 gals3600 gals2700 gals2700 gals2700 gals3800 gals2700 gals2700 gals5000 gals
Tender Fuel Capacity (oil/coal)4 tons4 tons4 tons4.5 tons5 tons5 tons4.5 tons4.5 tons4.5 tons5 tons5 tons5 tons10 tons
Minimum weight per yard of rail on which locomotive could run34 lb rail33 lb rail36 lb rail36 lb rail42 lb rail45 lb rail46 lb rail46 lb rail43 lb rail53 lb rail50 lb rail50 lb rail71 lb rail
Geometry Relating to Tractive Effort
Driver Diameter63"63"62"63"69"63"63"63"63"70"63"63"67"
Boiler Pressure130 psi130 psi130 psi130 psi140 psi160 psi140 psi140 psi140 psi150 psi150 psi180 psi180 psi
Cylinders (dia x stroke)16" x 24"16" x 24"16" x 24"16" x 24"17" x 24"16" x 24"17" x 24"17" x 24"17" x 24"18" x 24"18" x 24"17" x 24"18" x 26"
Tractive Effort10776 lbs10776 lbs10950 lbs10776 lbs11962 lbs13263 lbs13101 lbs13101 lbs13101 lbs14163 lbs15737 lbs16845 lbs19237 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.75 3.71 3.91 3.97 4.18 4.07 4.20 4.20 3.98 4.52 3.81 3.56 4.45
Heating Ability
Firebox Area90 sq. ft96 sq. ft92.20 sq. ft98 sq. ft120 sq. ft106 sq. ft120 sq. ft120 sq. ft120 sq. ft123 sq. ft127 sq. ft130 sq. ft148 sq. ft
Grate Area14.50 sq. ft14.50 sq. ft14.30 sq. ft15 sq. ft17.10 sq. ft17.50 sq. ft17.20 sq. ft17.20 sq. ft17.20 sq. ft17.50 sq. ft17.20 sq. ft17 sq. ft26.80 sq. ft
Evaporative Heating Surface79880695682310308921090109010901390121511771729
Superheating Surface
Combined Heating Surface79880695682310308921090109010901390121511771729
Evaporative Heating Surface/Cylinder Volume142.88144.31171.17147.36163.36159.71172.88172.88172.88196.64171.89186.68225.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1885188518591950239428002408240824082625258030604824
Same as above plus superheater percentage1885188518591950239428002408240824082625258030604824
Same as above but substitute firebox area for grate area11700124801198612740168001696016800168001680018450190502340026640
Power L13050314334083209416242773940394039404964412254776481
Power MT332.88346.46351.09330.98367.03349.23315.86315.86333.44341.99302.91402.49333.84

Reference

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.