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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Mystic in New London County, Connecticut — The American Northeast (New England)
 

Lathrop D-90 Diesel Engine

 
 
Lathrop D-90 Diesel Engine Marker image. Click for full size.
By Michael Herrick, August 26, 2013
1. Lathrop D-90 Diesel Engine Marker
Inscription.
Lathrop D-90
Diesel Engine
Horsepower: 90 @ 900 RPM
Cylinders: 6
Bore: 5 ½”
Stroke: 7”
Weight: 4,200 pounds
Displacement: 998 cubic inches
1n 1897, during the early days of gasoline-engine design, James W. Lathrop and his friend Gallup planned to improve the one-cylinder Palmer gasoline engine in
Gallupís launch. They found work space beside the Mystic River and built an entirely new engine similar to the Palmer. Instead of installing that engine, the two men sold it, bought a lathe, built two more engines, and sold them as well. This was the start of the Lathrop Engine Company, one of several engine manufacturers that would be established along the Mystic River.
By 1889, business was booming and Lathrop earned regard as one of the marine engine industryís pioneers. Over Lathropís lifetime, his company produced four-cycle gasoline engines and two-and four-cycle diesel engines for all manner of vessels.
After James Lathrop died in 1935, his son and grandson carried on the business into the early 950s. but with reduced sales and internal troubles, the company was sold in 1957 to Burmeister and Wain. Within a few years, B & W sold Lathrop to Grumman Allied Industries in Athens, New York, and the production of Lathrop engines ceased in Mystic.
This red engine
Lathrop D-90 Diesel Engine image. Click for full size.
By Michael Herrick, August 26, 2013
2. Lathrop D-90 Diesel Engine
is Lathropís D-90 diesel, rated 90 horsepower at 900 rpm. It may seem like a large 90 compared to other engines of the late 1940s, but Lathrop engines were rated conservatively. The D-90 produces more power than a comparably size engine rated well over 100 horsepower. When it was new, this D-90 cost $8,900. Although built in the late 1940s, it had run for no more than six hours before Mystic Seaport acquired it in 1985. During the late 1990s, volunteers rebuilt this engine to operational standards, and several volunteers maintain and run it about once a week throughout the year.
ID# 1985.33
 
Location. 41° 21.557′ N, 71° 57.896′ W. Marker is in Mystic, Connecticut, in New London County. Marker can be reached from the intersection of Greenmanville Avenue (Connecticut Route 27) and Bruggeman Place, on the right when traveling south. Touch for map. Located in Mystic Seaport. Marker is at or near this postal address: 75 Greenmanville Avenue, Mystic CT 06355, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Wichmann Semi-Diesel Engine (here, next to this marker); Compound Steam Engine (within shouting distance of this marker); Live Oak Log (within shouting distance of this marker); Hays & Ros Clark Shiplift
Lathrop D-90 Diesel Engine image. Click for full size.
By Michael Herrick, August 26, 2013
3. Lathrop D-90 Diesel Engine
(within shouting distance of this marker); Whaleship Charles W. Morgan (within shouting distance of this marker); Propeller Steamer Sabino (about 400 feet away, measured in a direct line); Harbor Tugboat Kingston II (about 400 feet away); Eastern-Rig Dragger Roann (about 400 feet away). Touch for a list and map of all markers in Mystic.
 
Also see . . .  Mystic Seaport, The Museum of America and the Sea. (Submitted on September 15, 2013, by Michael Herrick of Southbury, Connecticut.)
 
Categories. Waterways & Vessels
 
Lathrop D-90 Diesel Engine image. Click for full size.
By Michael Herrick, August 26, 2013
4. Lathrop D-90 Diesel Engine
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on September 15, 2013, by Michael Herrick of Southbury, Connecticut. This page has been viewed 459 times since then and 70 times this year. Photos:   1, 2, 3, 4. submitted on September 15, 2013, by Michael Herrick of Southbury, Connecticut.
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