SIMPSON DENNISON Tandem Compound Launch Engine
2½” + 4½” x 4” stroke
Overall engine dimensions: 31 inches high, 17 inches wide and 16 inches deep.
A reversing marine engine with tandem compound cylinders, Stephenson slotted link valve gear,
crosshead-driven feed pumps, lubrication system, draincocks and mahogany lagging.
This very rare engine by Simpson Dennison of Dartmouth was built 1885, prior to the company name change to Simpson Strickland & Co.