NAVYPEDIA

Photo

Castor mid-1920s Many thanks to Wolfgang Stöhr for additional information on this page.

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Castor	C4, 33, 20	812	Cammell Laird, Birkenhead	28.10.1914	28.7.1915	11/1915	sold for BU 7.1936
Constance	C5, 49, 90	813	Cammell Laird, Birkenhead	25.1.1915	12.9.1915	1/1916	sold for BU 1.1936
Canterbury	0A, 27, 59	435	John Brown, Clydebank	14.10.1914	21.12.1915	5/1916	sold for BU 7.1934
Cambrian	A3, 25, 30	255	Pembroke DYd	8.12.1914	3.3.1916	5/1916	sold for BU 7.1934

Technical data

Displacement normal, t	4320
Displacement full, t	4799
Length, m	135.9
Breadth, m	12.6
Draught, m	4.50
No of shafts	4
Machinery	4 sets Parsons geared steam turbines, 6 Yarrow boilers Canterbury: 4 sets Brown-Curtis geared steam turbines, 6 Yarrow boilers
Power, h. p.	40000
Max speed, kts	28.5
Fuel, t	oil 841
Endurance, nm(kts)	5900(10)
Armour, mm	belt: 76 - 38, deck: 25, CT: 152, gun shields: 102
Armament	Castor, Constance, Canterbury: 2 x 1 - 152/45 BL Mk XII, 8 x 1 - 102/45 QF Mk V, 1 x 1 - 76/23 13pdr 6cwt QF Mk V, 4 x 1 - 47/40 3pdr Hotchkiss Mk I, 2 - 533 TT (beam) Cambrian: 3 x 1 - 152/45 BL Mk XII, 6 x 1 - 102/45 QF Mk V, 1 x 1 - 76/23 13pdr 6cwt QF Mk V, 4 x 1 - 47/40 3pdr Hotchkiss Mk I, 2 - 533 TT (beam)
Complement	368

Standard scale images

Graphics

Project history

The light cruisers ordered under the 1914-15 Programme were repeats of the Calliope, with the same layout. Only the Cambrian, last to be completed, incorporated the improved layout of the earlier class: 1 152mm gun in place of the sided 2 102mm on the forecastle. The other three were brought up to the same standard in 1916-17, and among other improvements a tripod with light director replaced the pole foremast.

Protection

Armoured belt protected ship at full length, its thickness was 76mm abreast machinery spaces (51mm armour on 25mm plating), 51mm (38mm armour on 13mm plating) aft and 38mm (25mm armour on 13mm plating) fore. Belt was closed by aft 25mm bulkhead near stern. It extended to main deck (and to upper deck abreast machinery). Machinery and steering gear were covered by 25mm deck.

Modernizations

1916 - 1917, Canterbury, Castor, Constance: - 2 x 1 - 102/45; + 1 x 1 - 152/45 BL Mk XII

1917 - 1918, Cambrian: - 6 x 1 - 102/45, 1 x 1 - 76/23; + 1 x 1 - 152/45 BL Mk XII, 1 x 1 - 102/45 QF Mk V, 2 x 1 - 40/39 2pdr QF Mk II

1917 - 1918, Canterbury: - 6 x 1 - 102/45, 1 x 1 - 76/23; + 1 x 1 - 152/45 BL Mk XII, 2 x 1 - 76/45 20cwt QF Mk I, 4 x 2 - 533 TT

1917 - 1918, Castor, Constance: - 6 x 1 - 102/45, 1 x 1 - 76/23; + 1 x 1 - 152/45 BL Mk XII, 2 x 1 - 76/45 20cwt QF Mk I

1920s, Castor: + 2 x 1 - 40/39 2pdr QF Mk II

1920s, Cambrian: - 1 x 1 - 102/45; + 2 x 1 - 76/45 20cwt QF Mk I

1920s, Canterbury: - 4 x 2 - 533 TT

Naval service

Castor was damaged at Jutland.

mid-1920s

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