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ROYAL NAVY (UNITED KINGDOM)

CAPITAL SHIPS & MONITORS

ROBERTS monitors (1941-1943)

Abercrombie 1943

Name No Yard No Builder Laid down Launched Comp Fate
Roberts F40 573 John Brown, Clydebank 30/4/1940 1/2/1941 27/10/1941 stricken 1955
Abercrombie F109 42 Vickers-Armstrong, Tyne 26/4/1941 31/3/1942 5/5/1943 drill ship 7/1946, sold for BU 1954

 

Displacement standard, t

Roberts: 7973

Abercrombie: 8536

Displacement full, t

Roberts: 9150

Abercrombie: 9717

Length, m

113.8

Breadth, m

27.4

Draught, m

Roberts: 4.11 deep load

Abercrombie: 4.39 deep load

No of shafts

2

Machinery

2 sets Parsons geared steam turbines, 2 Admiralty 3-drum boilers

Power, h. p.

4800

Max speed, kts

12.5

Fuel, t

491 oil

Endurance, nm(kts) 2600-2800(12)

Armour, mm

Roberts: belt: 381 - 102, barbette: 203, turret: 330 (face) - 280 (sides and rear) - 127 (roof), CT: 76 - 51, deck: 102 - 51, longitudinal bulkhead: 38

Abercrombie: belt: 381 - 102, barbette: 203, turret: 330 (face) - 280 (sides and rear) - 152 (roof), CT: 76 - 51, deck: 102 - 51, longitudinal bulkhead: 38

Armament

Roberts: 1 x 2 - 381/42 BL Mk I, 4 x 2 - 102/45 QF Mk XVI, 1 x 8 - 40/39 2pdr QF Mk VIII, 2 x 4 - 40/39 2pdr QF Mk VIII, 8 x 1 - 20/70 Oerlikon Mk II/IV

Abercrombie: 1 x 2 - 381/42 BL Mk I, 4 x 2 - 102/45 QF Mk XVI, 1 x 8 - 40/39 2pdr QF Mk VIII, 2 x 4 - 40/39 2pdr QF Mk VIII, 8 x 2 - 20/70 Oerlikon Mk II/IV, 4 x 1 - 20/70 Oerlikon Mk II/IV

Electronic equipment

Roberts: type 281, 3x type 282, 2x type 285 radars

Abercrombie: type 272M, type 281, 3x type 282, 2x type 285 radars

Complement

442/460

Project history: Roberts was built by the 1940 program under modified Erebus design with shorter hull, some smaller machinery power and geared turbines instead of steam machines. In comparison with a prototype they had more developed superstructure and outwardly resembled Nelson class. Roberts received 381mm turret from monitor Marshal Soult. The second ship of this class Abercrombie was armed with a turret in due time ordered for a battlecruiser Furious. She differed from leading ship by arranging of 102mm guns, they were raised by one deck level.

Protection: Main belt extended between barbette and main mast and sloped outwards along the top of bulges. Abercrombie has a greater area of 102mm deck armour than Roberts. Main deck over main magazines was raised and has 152-102mm glacis. There was also 38mm splinter protection for magazines. Thickness of lower deck over steering gear was 76mm. Underwater protection depth was 5.2m, there was 38mm torpedo bulkhead.

Modernizations: 1943, Roberts: - type 281 radar; + 8 x 1 - 20/70 Oerlikon Mk II/IV, type 279, type 272P radars

7/1945, Roberts: - type 272P radar; + 8 x 1 - 40/56 Bofors Mk I/III, 4 x 1 - 20/70 Oerlikon Mk II/IV, type 268 radar, full displacement: 9500 t

1945, Abercrombie: - type 272M, 281 radars; + 4 x 1 - 20/70 Oerlikon Mk II/IV, type 293, 79B radars, oil stowage was 670t, full displacement: 9900t

1/1946, Roberts: 1 x 2 - 381/42 Mk I, 4 x 2 - 102/45 Mk XIX, 8 x 1 - 40/60 Mk III, 1 x 8 - 40/39 Mk VIA, 2 x 4 - 40/39 Mk VII, 20 x 1 - 20/70 Mk III, type 272P, type 279, 3x type 282, 2x type 285 radars

1/1946, Abercrombie: 1 x 2 - 381/42 Mk I/N, 4 x 2 - 102/45 Mk XIX, 1 x 8 - 40/39 Mk VIA, 2 x 4 - 40/39 Mk VII, 8 x 2 - 20/70 Mk V, 8 x 1 - 20/70 Mk III, type 79B, 3x type 282, 2x type 285, type 293 radars

 

Naval service: Roberts served as drill ship after war, stricken in 1955 and sold for BU in 1965. Abercrombie from 7/1946 served as drill ship and later as accommodation ship for RNVR.

Many thanks to Wolfgang Stöhr for additional information on this page.

Roberts

 

Ivan Gogin, 2008-15