Compound Steam Engine

Compound Steam Engine (HM1AUC)

Location: Stonington, CT 06355 New London County
Country: United States of America

N 41° 21.571', W 71° 57.889'

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Inscription
Compound Steam Engine
From Tugboat Socony 5
Horsepower: 850
Cylinders: 2
Bore: 19", 40"
Stroke: 28"
Weight: 40,000 pounds
Length: 8' 9" ? Width: 6' 10" ? Height: 14'
This large steam engine was built in 1927 by the Staten Island Shipbuiding Company in Staten Island, NY. It turned a 10-foot-diameter propeller on the steel tugboat Socony 5, part of a New York Harbor tugboat fleet owned by Standard Oil Company of New York.
Developed about 1870, the two-cylinder engine was a practical power plant for small to medium-sized vessels for almost 80 years until superseded by diesel engines. This example worked with a steam pressure of 160 pounds per square inch. Steam from the boiler first entered the small high-pressure cylinder, driving its piston, and was then exhausted into the large low-pressure cylinder to expand further.
The engine's horsepower of 850 may seem modest by today's standards, but this figure is based on a working load output, unlike horsepower calculations for modern internal-combustion engines. This engine has 10 times the horsepower of the Paine compound engine of the Museum's passenger steamboat Sabino.
ID# 1993.153
Details
HM NumberHM1AUC
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Marker ConditionNo reports yet
Date Added Monday, September 8th, 2014 at 11:51pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)19T E 251999 N 4582909
Decimal Degrees41.35951667, -71.96481667
Degrees and Decimal MinutesN 41° 21.571', W 71° 57.889'
Degrees, Minutes and Seconds41° 21' 34.26" N, 71° 57' 53.34" W
Driving DirectionsGoogle Maps
Area Code(s)860
Closest Postal AddressAt or near 41 Greenmanville Ave, Stonington CT 06355, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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