HMS Polyphemus (1840)

HMS Polyphemus was an Alecto-class sloop designed by Sir William Symonds, Surveyor of the Navy. Originally classed as a steam vessel (SV3), her classification would be changed to a Third Class Sloop. She initially served in the Mediterranean, west coast of Africa and the Baltic. She was wrecked on the Baltic side Jutland on 29 January 1856.

For other ships with the same name, see HMS Polyphemus.

History
United Kingdom
NameHMS Polyphemus
Ordered25 February 1839
BuilderRoyal Dockyard, Sheerness
Cost£27,596
Laid downFebruary 1840
Launched28 September 1840
Completed24 April 1841
Commissioned25 February 1841
FateWrecked 29 January 1856
General characteristics
Type
  • Steam Vessels (SV3)
  • Third Class Sloop
Displacement1,283 tons
Tons burthen800+80⁄94 bm
Length
  • 164 ft 0 in (50.0 m) gundeck
  • 142 ft 6.5 in (43.4 m) keel for tonnage
Beam
  • 32 ft 8 in (10.0 m) maximum
  • 32 ft 6 in (9.9 m) for tonnage
Draught
  • 6 ft 5 in (2.0 m)forward
  • 7 ft 6 in (2.3 m) forward
Depth of hold18 ft 7 in (5.7 m)
Installed power200 nominal horsepower
Propulsion
  • 2-cylinder VSE direct acting steam engine
  • Paddles
Armament
  • 2 x 32-pdr (42 cwt) MLSB guns on pivot mounts
  • 2 x 32-pdr (25 cwt) MLSB guns on broadside trucks

Polyphemus was the second named vessel since it was used for a 64-gun third rate, launched at Sheerness Dockyard on 27 April 1782, converted to a powder hulk in September 1813 and her breaking was completed at Chatham on 15 September 1827.

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