| Description | General Boat Engine Drawings (19 items).
1280g. 150 Horse Power "Gorgon"-Type Engines. Jan.-Apr., Jul. 1839. 19 items.
150 horse power direct-acting "Gorgon"-type engines, with 64¾ inch cylinders, 5 foot strokes.
Cylinder and slide valve, slide valve, views of the cylinder etc., cylinder side rods - partially coloured reverse drawings; sketch plans of 3 engine room layouts for 2 150 horse engines - coloured reverse drawing; coloured sketch plan of engine room layout (this plan is marked "No. 4" but dated, probably erroneously, as 1838); air pump and condenser, air pump bucket - coloured reverse drawing; expansion valve gearing - partially coloured reverse drawing; sketch for expanding valves - coloured reverse drawings; sketch plan of air pumps and condensers; rough coloured plan of engine room; draft drawing of air pump and condenser - partially coloured; transcript of letter from James Brown dated London, 22 Jan. 1839, titled "Observations on the Sketches of the 150 horse cylinder and Nozzles etc."; transcript of letter from James Brown to Gilbert Hamilton dated London, 1 Feb. 1839, re cylinders, nozzles, valves, problems with Fawcett's design etc.; transcript of letters from James Brown to Gilbert Hamilton dated London, 8 Mar. & 5 Apr. 1839, with observations on the drawings of the cylinder and air pump and air pump and condenser; memorandum re waste water pipes; note from Robert Meiklejohn to William S. Garland listing articles of the 150 horse engines that he can find (not dated). All the drawings were made in the London office and most bear letter codes.
Engines of this type were fitted in the Navy steamer Virago.
See also: Portfolios 5/1230 (drawings of Virago), 5/1280h, 6/29) (general drawings of 150 horse direct engines).
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