NAVYPEDIA

Photo

Mastiff

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Murray	HA4, H86, D33		Palmers, Jarrow	1913	6.8.1914	12.1914	sold 5.1921
Myngs	HA5, H87, D41		Palmers, Jarrow	1913	24.9.1914	2.1915	sold 5.1921
Matchless	H4A, H73, D47		Swan Hunter, Wallsend	1913	5.10.1914	12.1914	sold 10.1921
Milne	H8A, H80, D12		John Brown, Clydebank	1913	5.10.1914	12.1914	sold 9.1921
Morris	AH3, H85, D35		John Brown, Clydebank	1913	19.11.1914	12.1914	sold 11.1921
Moorsom	HA2, H84, D27		John Brown, Clydebank	1913	20.12.1914	2.1915	sold 11.1921
Mentor	H6A, H77, D54	468	Hawthorn Leslie, Hebburn	1913	21.8.1914	1915	sold 5.1921	Hawthorn Leslie 'specials'
Mansfield	H1A, H70, D37	469	Hawthorn Leslie, Hebburn	1913	3.12.1914	1915	sold 10.1921	Hawthorn Leslie 'specials'
Meteor	H7A, H78, D84	696	Thornycroft, Woolston	1913	24.7.1914	9.1914	sold 5.1921	Thornycroft 'specials'
Mastiff	H3A, H72, D66	697	Thornycroft, Woolston	1913	5.9.1914	11.1914	sold 5.1921	Thornycroft 'specials'
Miranda	HA0, H83, D24		Yarrow, Scotstoun	1912	27.5.1914	8.1914	sold 10.1921	Yarrow 'specials'
Minos	H9A, H81		Yarrow, Scotstoun	1912	6.8.1914	10.1914	sold 8.1920	Yarrow 'specials'
Manly	H0A, H69, D20		Yarrow, Scotstoun	1913	12.10.1914	12.1914	sold 10.1921	Yarrow 'specials'

Technical data

Displacement normal, t	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 900 Mentor, Mansfield: 1055 Meteor, Mastiff: 980 Miranda, Minos, Manly: 850
Displacement full, t	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 1100 Miranda, Minos, Manly: 990
Length, m	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 83.3 Mentor, Mansfield: 82.8 Meteor, Mastiff: 83.6 Miranda, Minos, Manly: 82.1
Breadth, m	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 8.15 Mentor, Mansfield: 8.23 Meteor, Mastiff: 8.31 Miranda, Minos, Manly: 7.81
Draught, m	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 2.59 Mentor, Mansfield: 3.20 Meteor, Mastiff: 3.05 Miranda, Minos, Manly: 2.90
No of shafts	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 3 Mentor, Mansfield, Meteor, Mastiff, Miranda, Minos, Manly: 2
Machinery	Murray, Myngs, Matchless: 3 Parsons steam turbines, 4 Yarrow boilers Milne, Morris, Moorsom: 3 Brown-Curtis steam turbines, 4 Yarrow boilers Mentor, Mansfield, Meteor, Mastiff: 2 sets Parsons independent reduction steam turbines, 4 Yarrow boilers Miranda, Minos, Manly: 2 Brown-Curtis steam turbines, 3 Yarrow boilers
Power, h. p.	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 25000 Mentor, Mansfield: 27000 Meteor, Mastiff: 26500 Miranda, Minos, Manly: 23000
Max speed, kts	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 34 Mentor, Mansfield, Meteor, Mastiff, Miranda, Minos, Manly: 35
Fuel, t	oil 278
Endurance, nm(kts)
Armament	3 x 1 - 102/40 QF Mk IV, 2 x 1 - 40/39 2pdr QF Mk II, 2 x 2 - 533 TT (4), 4 Elia Mk IV mines
Complement	Murray, Myngs, Matchless, Milne, Morris, Moorsom: 80 Mentor, Mansfield: 76 Meteor, Mastiff: 82 Miranda, Minos, Manly: 79

Standard scale images

Graphics

Project history

The boats of the 1913-14 Programme were improved 'L's, wilh 6kts more speed, at the insistence of the new First Lord of the Admiralty, Winston Chutthill. For the first time speed of delivery was all-important, as the Admiralty clearly recognised that war was imminent, and Thornycroft, White and Yarrow were asked to accept two orders each, with the first payment to be made in April 1913, before contracts were signed (delivery was to be in March 1914). Thus when in March 1913 the Controller issued invitations to tender, the three boats building at Thornycroft and the two each at Yarrow and Hawthorn Leslie were 'bought' as if they had been built on speculation. Two orders planned for J S White were not placed, however, and Thornycroft were given a third order. Geared turbines were favoured, but the E-in-C wished to wait until the trials results with Leonidas and Lucifer were available before making the switch to the 'all-geared' type. Similarly longitudinal framing would be examined after Ardent had finished her trials.     Excluding the seven 'stock' boats already building, the final order was for only six, three from John Brown, two from Palmer and one from Swan Hunter, making 13 instead of the normal 20 for a full flotilla. The reason was that money for the Arethusa class light cruisers had used up funds in the current Estimates - a decision which was justified on the dubious grounds that they would take over many of the duties of destroyers. The lead boat, Miranda was begun in October 1912 and completed in August 1914, followed by her sisters in October-November. She made 33kts in deep load condition, whereas Minos in light condition made 36kts on a 6-hour trial. The 'M' class were generally similar to the 'L' class in appearance, but with the midships gun on the deck, not on a 'bandstand' platform. The Yarrow boats had two funnels and the bridge carried well back from the forecastle. The Hawthorn Leslie boats had four funnels. The Admiralty boats had short funnels, and the Thornycroft boats could be distinguished by three taller flat-sided funnels. The design proved most successful and, with only slight modifications, was used for mass-production in the war which followed.

Marksman, Menace and Monitor were projected for the 1914-15 Programme but were cancelled in favour of two Lightfoot class leaders.

Modernizations

1917, Meteor: - 1 x 1 - 102/40, 2 x 2 - 533 TT; + 60 mines

Naval service

No significant events.