| Description | 69a. Portsmouth Dockyard Extension - Main, Drainage and Sluice Engines. Jun., Aug., Nov. 1874, Apr., May 1875. 5 items.
Main engine: Compound engine with 40 inch and 64 inch cylinders.
Drainage engines: Two inverted vertical engines, with 16 inch cylinders, 2 foot strokes.
Sluice engine: Inverted vertical engine, with 10 inch cylinder, 1 foot stroke.
Air pump and girders for drainage engines - partially coloured drawing made in the London office; details of air pump valves - partially coloured drawing; slide and expansion valves - partially coloured reverse drawing; air pump plunger for main engine - partially coloured drawing; cylinder escape valves for drainage engines - coloured drawing made in the London office. All the drawings except the first and last items bear letter codes.
For the Honourable the Commissioners of the Navy. H. M. Dockyard, Portsmouth.
See also: 7/30. |