SS Ukkopekka is a Finnish steamship in service as a tourist and heritage attraction.
SS Ukkopekka underway.
SS Ukkopekka.
SS Ukkopekka in drydock 2005.
SS Ukkopekka off Kultaranta, the residence of the Finnish president.
A compound steam engine unit is a type of steam engine where steam is expanded in two or more stages.
A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure (HP) cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger-volume low-pressure (LP) cylinders. Multiple-expansion engines employ additional cylinders, of progressively lower pressure, to extract further energy from the steam.
Cutaway of triple expansion compound steam engine, 1888
Robey horizontal cross-compound steam engine small high-pressure cylinder (left) and large low-pressure cylinder (right)
The Coldharbour Mill Pollit and Wigzell cross-compound engine, which drives the rope race seen in the background, transmitting power to line shafts on all five levels of the mill
A Marchent & Morley horizontal tandem compound engine built 1914, at Craven Mills, Cole. The air pump and jet condenser are nearest with the LP cylinder beyond. It is fitted with Morley's patent piston drop valves
