CMO #386

Chicago, St. Paul, Minneapolis, & Omaha Ry., Class "I-2" 4-6-2 #386
Photo taken, Shell Lake, Wis. Circa 1947
The "Noon Train" (northbound) at Shell Lake generally indicated to everyone in town that it was time for lunch. This low angle shot taken at about driving axle height shows details that most locomotive photos don't. first, the "laceyness" of the quill spoked driving wheels, second, the springs mounted directly above the drivers, and third, the fact that the driving wheels were quartered with the right side drivers leading the left side by 90 degrees thus spreading out the 4 power strokes per revolution evenly. The most likely replacement for the failing gas-electric on the Namakagon was #386. the later I-2 series built in 1910 ran from #383 to #387 and at one time or another all of them pulled the Namakagon but #386 seemed to be the main stand by. All of the Omaha passenger engines had bigger Driving wheels (75", or 81") than the 69" drivers of the Iron range passenger engines, and were capable of much higher speeds although the Spooner-Baronett hill made #364 work for a living. speeds in excess of 70 mph. were common on many parts of the run.
Series...........................#383-387
Cylinders, Dia. & Stroke=.......... 21" x 28" ~ Overall Height =.................. 14'-9,5/8"
Valve, (Piston)..............12" Dia. 6" travel ~ Width over Cab =.....................10'-0"
Valve Gear= .........................Walschaert ~ Rigid wheel base = ....................13'-0"
Driving wheel Diameter =...................75" ~ Engine wheel base = .............33'-2,1/2"
Boiler Pressure,.........................200 lb. ~ Eng length over buffer plates=...... 45'-0"
Grate Area =.........................47 sq. ft. ~ Wheel base, Eng/Tend.=...............64'-4"
Firebox, L. / W. =........90,1/8" X 75,1/4". ~ Length Eng. & Tender = ........74'-10,1/2"
Length over tube sheets.................20'-0" ~ Wt. on lead truck ..................44,000 lb.
Tubes, Dia. & No.=. 2,1/4"=128,--5,1/2"=28 ~ Wt. on Trailing Truck............. 33,000 lb.
Htg. Surface, Tubes= .. 1501 & 802.5 sq. ft ~ Wt. on Drivers =................... 133,000 lb.
Htg. Surface, Firebox =...........170. sq. ft. ~ Wt. of total Engine =............... 212,000 lb.
Htg. Surface, Arch tubes =..........23 sq. ft. ~ Tender Wt., Loaded............... 158,700 lb.
Evap. Htg. Surface, total =......2496.5 sq. ft ~ Wt. eng. & Tender=.............. 370,700 lb.
Superheating. Surface, total =.... 648 sq. ft ~ Wt. of Engine, light =.................????? lb.
Boiler Dia. 1st. ring =.............. 63" I.D. ~ Tender Wt., light.................... 64,640 lb.
Height of boiler center = ...............9'-1". ~ Tender capacity, Water = ..........7500 gal. lb.
Journals, Driving wheel = ......... 9" X 12" ~ Tender capacity, Coal =................... 18 tons
Journals, Front truck=.............6" X 10" ~ Tractive force =..........................27,988 lb.
Journals, Trailing truck =....... 8" X 14". ~ Factor of Adhesion =.......................... 4.82
Power Reverse,..........................None ~ Wt on Drivers/ engine wt.=................. 63.6%
Stoker=....................................None ~ Ratio, Htg. Sur. to Grate area =.........53.123/1
Air Pump =.......... 2, 9,1/2" Westinghouse ~ Ratio TF per lb. boiler Pressure=.......... 139.94
Min. Curve =23 Degrees or 251 ft. rad. Built by Alco-Schenectady, 12/1910, C/N 48955, Delivered ?????

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Chicago, St. Paul, Minneapolis, & Omaha Ry., Class "I-2" 4-6-2 #386

Photo taken, Shell Lake, Wis. Circa 1947

Series...........................#383-387

Cylinders, Dia. & Stroke=.......... 21" x 28" ~ Overall Height =.................. 14'-9,5/8"

Valve, (Piston)..............12" Dia. 6" travel ~ Width over Cab =.....................10'-0"

Valve Gear= .........................Walschaert ~ Rigid wheel base = ....................13'-0"

Driving wheel Diameter =...................75" ~ Engine wheel base = .............33'-2,1/2"

Boiler Pressure,.........................200 lb. ~ Eng length over buffer plates=...... 45'-0"

Grate Area =.........................47 sq. ft. ~ Wheel base, Eng/Tend.=...............64'-4"

Firebox, L. / W. =........90,1/8" X 75,1/4". ~ Length Eng. & Tender = ........74'-10,1/2"

Length over tube sheets.................20'-0" ~ Wt. on lead truck ..................44,000 lb.

Tubes, Dia. & No.=. 2,1/4"=128,--5,1/2"=28 ~ Wt. on Trailing Truck............. 33,000 lb.

Htg. Surface, Tubes= .. 1501 & 802.5 sq. ft ~ Wt. on Drivers =................... 133,000 lb.

Htg. Surface, Firebox =...........170. sq. ft. ~ Wt. of total Engine =............... 212,000 lb.

Htg. Surface, Arch tubes =..........23 sq. ft. ~ Tender Wt., Loaded............... 158,700 lb.

Evap. Htg. Surface, total =......2496.5 sq. ft ~ Wt. eng. & Tender=.............. 370,700 lb.

Superheating. Surface, total =.... 648 sq. ft ~ Wt. of Engine, light =.................????? lb.

Boiler Dia. 1st. ring =.............. 63" I.D. ~ Tender Wt., light.................... 64,640 lb.

Height of boiler center = ...............9'-1". ~ Tender capacity, Water = ..........7500 gal. lb.

Journals, Driving wheel = ......... 9" X 12" ~ Tender capacity, Coal =................... 18 tons

Journals, Front truck=.............6" X 10" ~ Tractive force =..........................27,988 lb.

Journals, Trailing truck =....... 8" X 14". ~ Factor of Adhesion =.......................... 4.82

Power Reverse,..........................None ~ Wt on Drivers/ engine wt.=................. 63.6%

Stoker=....................................None ~ Ratio, Htg. Sur. to Grate area =.........53.123/1

Air Pump =.......... 2, 9,1/2" Westinghouse ~ Ratio TF per lb. boiler Pressure=.......... 139.94

Min. Curve =23 Degrees or 251 ft. rad. Built by Alco-Schenectady, 12/1910, C/N 48955, Delivered ????? Next List Front Page

Built by Alco-Schenectady, 12/1910, C/N 48955, Delivered ?????

Min. Curve =23 Degrees or 251 ft. rad. Built by Alco-Schenectady, 12/1910, C/N 48955, Delivered ?????

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