Chapin Mine
Cornish Pumping Engine
(Double Expansion Tandem
Steam Engine)
Iron Mountain, MI
Detail
Specifications:
Builders: Edward P. Allis Co. (now Allis Chalmers), West Allis, WI
Installed:
1890
Type: Tandem Double Expansion "Cornish" engine:
(based on the style of mine pumping engine in use in Cornwall, England at the
time.)
High Pressure Cylinder:
50"
Low Pressure Cylinder: 100"
Stroke: 120"
Pump Plunger: 37.5"
Discharge pipe: 48"
Speed: 11 rpm
Flywheel diameter: 40'
Pump Capacity:
Number of pumps: 8
5 pumps at 192' intervals
2 pumps at 170' intervals
Shaft depth 1500'
Pump rod dia: 8" (376'), 7" (1108')
Pump rod approx weight:
Pump plungers: 28"
Pump discharge 28: dia
Gallons/minute: 3400 gal
Daily capacity: 5 Million gal
Overall:
Engine weight: 160 tons
Height: 54'