In case it was necessary to disconnect on one side of a compound engine, how would you cover ports and hold valves in position?
The compound engine was first thought of by Watt about 1767.
The latter experimenter demonstrated that the compound engine has two important merits as against the simple engine.
If a condenser is not used, then it is simply a compound engine.
A compound engine is also made with the Woolf single valve gear.
We tried the engine this time as a compound engine, with a favorable result.
The trials completely confirmed the view that the compound engine owed its superiority to reduced range of temperature.
Figs. 46 to 48 show three different types of the compound engine.
So in using steam expansively the back pressure must be at a minimum, and this is especially true in the compound engine.
These vessels are now invariably fitted with the compound engine and surface-condensers.