| Description | Steam Boat Engines (15 items).
1249. Dover Packets Crusader and Salamander. May 1829, Jan. 1830, Jan. 1834, Dec. 1835, Jan., Aug., Nov. 1836. 15 items.
Two sets of two 31 horse power cylinders, 32 inches diameter, 3 foot stroke. Boats re-named Charon and Beaver 1837.
Also boilers, bilge and hot water pumps.
Sections and plan of boiler for 2 25 horse engines - original and reverse drawings made in the London office (these drawings were also used for boilers for William IV, Firefly and Ferret); sections and plan of Crusader's first boiler made by Maudslay Sons & Field - drawing made in the London office; bilge and hot water pumps for Crusader - partially coloured original and partially coloured reverse drawings, Jan. 1834.
Drawings for the new cylinders, 1835-1837: cylinder and slide valve - partially coloured original drawing; sections and plan of boiler - partially coloured original and partially coloured reverse drawings (these drawings were also used for boilers for the Ceylon steam vessel Seaforth); main lever for Crusader - coloured original and coloured reverse drawings; coal boxes and steam pipes for Salamander - original and reverse drawings; drawings of the Crusader - cross-section of the boat, longitudinal section of the engine room and boiler and plan of the deck, plan of the sleepers etc. (partially shaded) - reverse drawings made in the London office. Some of the drawings bear letter codes.
Original Portfolio or 'Book' No. 905. Catalogue of Old Engines p. 324.
For H. M. Post Office, Dover Station. These two boats, built by Graham of Harwich, were originally fitted with 25 horse engines made by Maudslay Sons & Field. Boulton Watt & Co. supplied various other parts, including new cylinders and slide valves to increase the power of the engines in 1836. Crusader was re-named Charon and Salamander was re-named Beaver in 1837 when the Navy took over the Post Office packet fleet. Henry Hazleton allocated separate portfolio numbers to both boats, despite the fact that their drawings were not originally kept separately; Crusader was Pf. 1249, and Salamander was Pf. 1250. |