Hawthorn M-class destroyer

Class overview
Builders	Hawthorn Leslie and Company, Hebburn
Operators	Royal Navy
Built	1914–1915
In commission	1915–1921
Completed	2
Retired	2
General characteristics
Type	Destroyer
Displacement	1,057 long tons (1,074 t)
Length	271 ft 6 in (82.75 m) o/a
Beam	27 ft 6 in (8.38 m)
Draught	10 ft 6 in (3.20 m)
Depth	16 ft 9 in (5.11 m)
Propulsion	Yarrow-type boilers, Parsons I.R. steam turbines, 3 shafts, 27,000 hp (20,134 kW), 300 tons oil fuel
Speed	35 knots (40 mph; 65 km/h)
Complement	76
Armament	3 × QF 4 in (102 mm) Mark IV guns, mounting P Mk.IX 1 × single QF 2-pounder "pom-pom" Mk.II 2 × twin 21 inch (533 mm) torpedo tubes

The Hawthorn M (or Mansfield) Class were a class of two destroyers built for the Royal Navy under the pre-war 1913-14 Programme for World War I service.

They were similar to the Admiralty M class, but completed to a modified design by Hawthorn Leslie and Company, Hebburn on Tyne. They had four funnels instead of the three funnels of the Admiralty design; as a consequence, they were the last four-funnelled destroyers (apart from Leaders) to be built for the Royal Navy. The midships 4 inch gun was shipped between the second and third funnels. Both ships were laid down on 9 July 1914 and completed in 1915. Both survived the war and were scrapped in 1921,

Hawthorn Leslie subsequently received orders for two further M class destroyers as part of the large batch of orders placed in May 1915, but these two - Pidgeon and Plover - were built to the Admiralty M class design.

Ships

• Mentor, launched 21 August 1914, completed January 1915, sold for breaking up 9 May 1921 to Thos. W. Ward at Hayle.
• Mansfield, launched 3 December 1914, completed April 1915, sold for breaking up 26 October 1921 to Barking Ship Breaking Company.

Bibliography

• Destroyers of the Royal Navy, 1893-1981, Maurice Cocker, 1983, Ian Allan ISBN 0-7110-1075-7
• Jane's Fighting Ships, 1919, Jane's Publishing

• v
• t
• e

M-class destroyers

 Royal Navy

Admiralty M class	Murray Myngs Matchless Milne Morris Moorsom Negro Mandate Mons Michael Marmion Marne Mystic Martial Milbrook Prince Pylades Maenad Mameluke Mindful Nessus Magic Minion Opal Manners Marvel Mary Rose Ossory Mischief Menace Moresby Opportune Munster Noble Napier Onslaught Nonsuch Nestor Oracle Narwhal Nepean Nicator Nomad Onslow Nereus Narborough Pigeon Plover Partridge Medina Pelican Norman Orestes Petard Paladin Nizam Penn Pasley Medway Orford Plucky Observer Peyton Pellew Nonpareil Peregrine Offa Orpheus Octavia Parthian HMS Northesk (2) Oriole Portia Norseman Osiris Oberon Orcadia Oriana Ophelia Pheasant Obedient North Star Phoebe Obdurate Nugent
Hawthorn M class	Mentor Mansfield
Thornycroft M class	Meteor Mastiff Patriot Patrician Rapid Ready
Yarrow M class	Miranda Minos Manly Moon Morning Star Mounsey Musketeer Nerissa Relentless Rival
Yarrow Later M class	Sabrina Strongbow Surprise Sybille Truculent Tyrant Ulleswater

 Royal Canadian Navy

Thornycroft M class	Patriot Patrician

• Preceded by: Laforey class
• Followed by: R class

• List of destroyers of the Royal Navy