SS Demosthenes (1911)

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StateLibQld 1 115364 Demosthenes (ship).jpg
Demosthenes leaving Sydney
History
Civil Ensign of the United Kingdom.svgUnited Kingdom
NameDemosthenes
Namesake Demosthenes
OwnerGeorge Thompson & Co Ltd
Operator Aberdeen Line
Port of registry Aberdeen
Route LondonCape TownMelbourne
Builder Harland and Wolff, Belfast
Yard number418
Launched28 February 1911
Completed5 August 1911
Maiden voyage31 August 1911
Identification
FateScrapped 18 October 1931
General characteristics
Type Ocean liner
Tonnage11,223  GRT, 7,034  NRT
Length500.6 ft (152.6 m)
Beam62.3 ft (19.0 m)
Draught29 ft 6 in (8.99 m)
Depth39.4 ft (12.0 m)
Decks2
Installed power1,358 NHP
Propulsion
Speed15 knots (28 km/h)
Capacity
  • 100 first class berths
  • 1,200 third class berths
  • 212,019 cubic feet (6,004 m3) refrigerated cargo
Sensors and
processing systems
submarine signalling
Notes sister ships: Pericles, Themistocles

SS Demosthenes was a UK steam ocean liner and refrigerated cargo ship. She was launched in 1911 in Ireland for Aberdeen Line and scrapped in 1931 in England. In the First World War she was an Allied troop ship.

Contents

Aberdeen Line named some of its ships after classical Greek people and events. Demosthenes was a statesman and orator in Classical Athens in the fourth century BC.

Building

Harland and Wolff built Demosthenes on its slipway number five [1] in Belfast, launching her on 28 February 1911 and completing her on 5 August. [2] She was a sister ship of Pericles, which was launched in 1907, and Themistocles, which was launched in 1910.

Watertight bulkheads divided Demosthenes' hull into 11 watertight compartments. She was designed to stay afloat if any two were flooded. [3]

Demosthenes had berths for 100 first class passengers on her bridge deck and awning deck, and 1,200 third class passengers on her poop deck, main deck and tween deck. [4] All of her passenger cabins were "outside cabins" with at least one porthole. Her public areas included a verandah café, library, lounge, social hall and smoking room. [3]

Her holds were refrigerated and had capacity for 212,019 cubic feet (6,004 m3) of cargo. [5] They had a total of seven hatches, served by 17 winches. [4]

From new, Demosthenes was equipped for wireless telegraphy and her navigation equipment included submarine signalling. [3] The Marconi Company operated her wireless on the 300 and 600 metre wavelengths. Her call sign was MGK. [6]

Engines

Demosthenes differed from her sisters by having a more modern propulsion system. Pericles and Themistocles each had twin screws driven by quadruple-expansion steam engines whose combined power output was rated at 1,075 NHP. [7] [8]

Demosthenes had three screws. A pair of four-cylinder triple-expansion steam engines drove her port and starboard screws. Exhaust steam from their low-pressure cylinders powered a low-pressure steam turbine that drove her middle screw. Harland and Wolff built her triple-expansion engines. John Brown & Company built her low-pressure turbine. The combined power output of her three engines was rated at 1,358 NHP, [9] which was 26 per cent more than her sisters, and gave her a speed of 15 knots (28 km/h). [10]

The combination of piston engines with a low-pressure turbine had been pioneered in 1908 in the cargo liner Otaki [11] built by William Denny and Brothers, [12] and the transatlantic liner Laurentic built by Harland and Wolff. [13] Laurentic proved more economical than her sister ship Megantic, which led a number of shipping lines and shipbuilders to choose a combination of piston engines and exhaust turbines for passenger and cargo liners.

Service

Aberdeen Line ran scheduled services between London and Australia via Cape Town. [14] The company advertised Demosthenes as "the first turbine steamer trading between England and Australia". [15] In August 1911 The Times more accurately described her as the first ship with a combination of reciprocating and turbine engines on the England – South Africa – Australia route. [4]

Demosthenes' maiden voyage was scheduled for 31 August 1911. She sailed from Royal Albert Dock, London and was scheduled to call at Plymouth, Tenerife and Cape Town on her way to Melbourne. Her voyage was scheduled to take 40 days [4] but she completed it in 36. [1] [3]

Troop ship

In 1915 the Commonwealth of Australia requisitioned the ship as HMAT Demosthenes, with the pennant number A64. [10] She sailed in five convoys from Australia carrying elements of the First Australian Imperial Force for service overseas. On 17 July 1915 she left Melbourne carrying 1,352 troops as part of Convoy 9. On the same trip she called at Fremantle, embarked another 159 troops, and sailed on 23 July. [16]

On 29 December 1915 Demosthenes left Melbourne carrying 1,598 troops as part of Convoy 16. On 18 May 1916 she left Sydney carrying 1,610 troops as part of Convoy 21. On 22 December 1916 she left Sydney carrying 1,240 troops and 46 naval officers as part of Convoy 27. [16]

Commonwealth Government control of Demosthenes ended on 16 March 1917. [10] However, on 9 November 1917 Demosthenes left Sydney carrying 78 troops and nine nurses as part of Convoy 35. [16]

On 17 August 1918 Demosthenes sailed from Quebec carrying troops including a party of 35 officers of the 69th Regiment, United States Army Coast Artillery Corps. She crossed the Atlantic, reaching Liverpool on 2 September. [17]

Post-war service

On 19 August 1920 Demosthenes resumed civilian sailings between London and Australia. Her post-war route included Brisbane. [2]

Shaw, Savill & Albion Line and White Star Line jointly owned Aberdeen Line. In 1928 White Star took over Commonwealth Line and merged it with Aberdeen Line. Demosthenes' route was changed to serve Liverpool instead of London. [4]

On 29 April 1931 Demosthenes suffered a fire in her forward bunkers. She was at sea, 950 nautical miles (1,760 km) west of Fremantle en route to Liverpool. The fire was brought under control, but her Master decided to turn back to Australia. [18]

On 20 July 1931 the Royal Mail Case opened at the Old Bailey, which led to the collapse of White Star Line's parent company. Demosthenes was laid up. [19] She was sold for scrap to Hughes Bolckow, and on 18 October 1931 she arrived at Blyth, Northumberland to be broken up. [2]

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References

  1. 1 2 "Demosthenes". Harland and Wolff. Retrieved 28 November 2020.
  2. 1 2 3 "Demosthenes". Shipping and Shipbuilding. Tees-Built Ships. Retrieved 28 November 2020.
  3. 1 2 3 4 "Voyage of Demosthenes". The Daily Telegraph . 12 October 1911. p. 14. Retrieved 25 December 2020 via Trove.
  4. 1 2 3 4 5 "The 'Demosthenes'". Oatlands Heritage Group. 2012. Retrieved 28 November 2020.
  5. "List of Vessels Fitted with Refrigerating Appliances". Lloyd's Register (PDF). Vol. I. London: Lloyd's Register. 1930. Retrieved 28 November 2020.
  6. The Marconi Press Agency Ltd 1914, p. 389.
  7. "Pericles". Shipping and Shipbuilding. Tees-Built Ships. Retrieved 28 November 2020.
  8. "Steamers & Motorships". Lloyd's Register (PDF). Vol. II. London: Lloyd's Register. 1933. Retrieved 28 November 2020.
  9. "Steamers & Motorships". Lloyd's Register (PDF). Vol. II. London: Lloyd's Register. 1930. Retrieved 28 November 2020.
  10. 1 2 3 "Transports". The AIF Project. University of New South Wales . Retrieved 28 November 2020.
  11. Dean, FE (28 July 1936). "Steam Turbine Engines". Shipping Wonders of the World. Amalgamated Press. 1 (25): 787–791. Retrieved 28 November 2020.
  12. "Otaki (1908)". Scottish Built Ships. Caledonian Maritime Research Trust. Retrieved 28 November 2020.
  13. "Laurentic". Shipping and Shipbuilding. Tees-Built Ships. Retrieved 28 November 2020.
  14. Dowling 1909, p. 277.
  15. "Aberdeen Line". GG Archives. Retrieved 28 November 2020.
  16. 1 2 3 Hoskin, John E. "HMAT". Flotilla Australia. Retrieved 28 November 2020.
  17. Hartwell, Joe. "The History of the 69th Artillery C.A.C. In the Great War" . Retrieved 28 November 2020.
  18. "Blaze fought on ships" . The New York Times . 30 April 1931. p. 15. Retrieved 28 November 2020.
  19. Wilson 1956, p. 194.

Bibliography