| Description | 30. Double Screw Gunboats - H.M.S. Leander and ? [Prince Regent?]. Jun.-Sep., Nov. 1865, Feb., Mar. 1866. 35 items.
Two sets of two 100 horse power boat engines, each engine with two 34 inch cylinders, 21 inch strokes, with 9 inch donkeys.
Tracings of drawings by J. & W. Dudgeon:
Lines & profile of afterbody for the new gunboats of 200HP; arrangement of butts in hull plating amidships; longitudinal section of space between armour bulkheads of nos. 47 & 48; horizontal section of ship a lower edge of armour belting; section at no. 60 aft; afterbody lines of nos. 47 & 48; section and plan of engine room; sketch showing rake of masts and funnels; cross-section of the hull.
Set of coloured drawings, 1 Sep. 1865:
Plan of the engines and boilers; longitudinal section of engine and boiler; cross-sections at the engines; cross-section at the boilers; plan of injection, feed and suction pipes.
Sections of boilers, plan of cylinders etc., cylinders and slides - partially coloured drawings; sections and plans of condenser and air pumps - 2 coloured drawings; propellers and screw tubes - coloured drawing; engine and propeller shafting - partially coloured drawing; shafting gear, details of starting gear - coloured drawings; slide diagram - partially coloured; feed and bilge pumps - partially coloured drawing; plan of foundation plate - partially coloured drawing; indicator gear for double screws - coloured drawing.
Also sheet of tracings of sections marked "Leander"; tracing of pushing block; pencil drawing of levers and rods for relief cocks; small coloured drawing of pipes [?] sent by James Brown Jr.; memorandum of details of boiler plates, tubes etc.; note from A. J. Dudgeon to William Langdon about upper edge of floors; note from "W. G. H." to William Langdon about steam tube bushes.
Also partially coloured tracing of screw arrangement marked "No. 8 vessel".
For H. M. Navy. Two gunboats, Leander and another, possibly named Prince Regent, built by J. & W. Dudgeon of Cubitt's Town Shipyard, Poplar, London. Dudgeons referred to the vessels as "Nos. 47 and 48", while James Watt & Co. called them "Dudgeons 1 and 2". These drawings were kept in the London office and sent to Soho at a later date."
See also: Portfolio 6/52 (drawings for HMS Leander).
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