| Description | 60c. Oscillating Engines - Chincha Islands Stores Boats (RJ & RK, RO & RP). Feb. 1864, Jun.-Aug., Oct., Dec. 1869, Mar. 1870, May 1880. 54 items.
Two sets of two 15 horse power oscillating engines, with 24 inch cylinders, 2 foot strokes.
Tracings of drawings by Lewis & Stockwell:
Elevations and plans of "proposed paddle wheel steamer… to be packed up & sent to South America in pieces" - partially coloured tracing, Feb. 1864 (unclear if this is a Chincha Islands boat); midship section, plan and sections of the engine room - partially coloured tracing; 2 deck plans; internal expansion of skin plating; sections and half-plan of the hull.
Cylinder, slide etc. - coloured drawing and coloured tracing; elevation and plan of the engines, pipes etc. - coloured and partially coloured drawings; plan of the deck beams, steam pipes etc. - coloured and partially coloured drawings; cross-section at the engines - coloured and partially coloured drawings; cross-section at the boiler - coloured and partially coloured drawings; plan and cross-section and lower plan of the donkey for pumping out tanks - partially coloured tracings; tie rods to eccentric pin brackets - 2 coloured tracings; section of the boiler, sketch showing alteration in height of combings - partially coloured tracing; feed and bilge pumps - partially coloured tracing (this drawing was originally made for 17½ horse engines for a steam boat for Nova Scotia).
Rough drawings made at Soho, miscellaneous tracings etc.:
Air pump connecting rod, slide valve for 10 and 12½ and 15 horse oscillating engines, piston, starting gear, framing for feed and bilge pumps, paddle float bracket, columns, slide valve rod guide bracket and guide bracket for top of the working gear sweep, starting gear bracket, position of holes in the cylinder cover, paddle shafts, template for cylinder facet, crank shaft, crank and paddle shaft brasses, shaft and eccentric, plan of holding down holes, steam pipes, eccentric - drawings made at Soho (several of these drawings were initially used for engines RF and RG, 12½ horse power oscillating engines for a London Engineering Co. tugboat); pencil sketch of spare pins; exhaust pipe flange; pencil note of valve positions [?].
Memoranda, correspondence etc.:
Specification of Proposed Iron Paddle Steamer, Jun. 1869 (5 pages); letter from C. W. Smith for Lewis & Stockwell dated London, 5 Jul. 1869, sending tracings; printed advertising circular showing Alexander Shanks & Son's improved steam winch, with tracing of pipes of the winch; list of proposed duplicates, Mar. 1870; original portfolio cover, with note from Alexander Shanks & Son sending the drawing of the winch stuck inside, Dec. 1869.
Also the following later item: design for 30 horse oscillating engines - drawing on blueprint paper, May 1880 (the original was sent to Lewis & Stockwell).
For the Chincha Islands, Peru. The boats were built by Lewis & Stockwell, who initially referred to them as "A98" and "A100". |