| Description | Steam Boat Engines (82 items).
1231. H. M. Frigates Eurotas (IV & IW) and Horatio (IX & IY). Oct. 1845-Jul. 1846. 82 items.
Two sets of two 175 horse power oscillating engines, each engine with two 43½ inch cylinders, 2½ foot strokes. Eurotas's engines later transferred to Simoom, Horatio's engines later transferred to Sans Pareil.
Plan of engines and steam pipes and boilers, plan of deck beams and longitudinal section of engine room and boilers and propeller shaft, cross-section of the boat and engines - coloured original and coloured reverse drawings; longitudinal section and plan of engine room and propeller etc. - 2 coloured reverse drawings; plan and section of engine room platforms etc. - coloured original and coloured reverse drawings; longitudinal section of engine room and boilers - coloured reverse drawing. All these drawings were made in the London office and most bear letter codes.
Cylinder and slide vale - partially shaded drawing; plan of the boilers - partially coloured original and partially coloured reverse drawings; longitudinal and cross-sections of boilers for Eurotas - 2 partially coloured original drawings; cross-sections of boiler for Eurotas - reverse drawing; plan and sections of boiler for Horatio - partially coloured original and partially coloured reverse drawings; sliding valve - partially coloured drawing; cross-section of the engines - coloured original and coloured reverse drawings; cross-section of the engines - original and reverse drawings; cross-section of the engines - partially coloured original and partially coloured reverse drawings; plan of the engines - partially coloured original, partially coloured direct copy and partially coloured reverse drawings; condenser and air pump etc., condenser, section on the line of air pump centre - partially coloured original and partially coloured reverse drawings; shaft and cranks - partially shaded original and direct copy; piston rod and cap - partially shaded original and partially coloured direct copy; plummer blocks - coloured original, partially coloured direct copy and partially coloured reverse drawings; Kingston's valve for waste water pipes - coloured drawing; expansion valves - coloured original (marked "Not to be proceeded with at present") and coloured reverse drawing, with note by William Langdon about the propriety of fitting expansion valves); end view of engines and plates etc. - coloured original and coloured reverse drawings; plan and section of pipes etc., feed valve for front of boilers - coloured original, partially coloured direct copy and coloured reverse drawings; brine, bilge and feeding pumps - coloured original and coloured reverse drawings; brine, bilge and feeding pumps - partially coloured original and reverse drawings; piston rod, propeller shaft (2 drawings made at Soho); steam stop valves, connecting rods for air pumps, throttle valve gearing - partially coloured original and partially coloured reverse drawings; Kingston's valve for injection - coloured original and coloured direct copy; plan and section of pipes etc. - partially coloured original and partially coloured reverse drawings; working, starting and eccentric gear - partially coloured drawing; working gear - partially coloured original and partially coloured reverse drawings; apparatus for resisting the thrust of the screw - coloured drawing. All these drawings were made in the London office except where noted, and all bear letter codes.
Also the following uncoded items, rough sketches etc.: tracing of plan of Horatio's boiler; tracing of cross-section of engines; section showing blow out and feed pipes; pencil sketch of bracket [?].
Also the following later items: side and front views and plan of double eccentric gear - coloured drawing and rough draft [?], Jan. 1849.
Original Portfolio or 'Book' No. 973. Catalogue of Old Engines p. 322.
For H. M. Navy. Eurotas and Horatio were screw-propeller driven 44 gun frigates. Engine Order Book No. 13 describes each engine as consisting of a pair of 43½ inch cylinders, and each boat having two engines. However the drawings refer to each boat having four 87½ horse engines. The engines were never installed in Eurotas and Horatio; engines IV and IW were transferred to the Simoom in May 1848, while engines IX and IY were transferred to the 90 gun frigate Sans Pareil in Jul. 1850, but they were removed in 1855 and replaced with 200 horse engines. The Catalogue of Old Engines erroneously says that Eurotas and Horatio were re-named. Henry Hazleton allocated separate portfolio numbers to both boats, despite the fact that they did not have separate drawings; Eurotas was Pf. 1231, and Horatio was Pf. 1232.
See also: Portfolios 6/2, 6/66 (drawings of the Simoom). |