NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate	Modification
Ottawa (ex-Griffin)	H31		Vickers-Armstrong, Barrow, UK	9/1934	15.8.1935	3/1936 // 3.1943	stricken 10.1945, BU 1.1946	"G" group
Chaudiere (ex-Hero)	H99		Vickers-Armstrong, Tyne, UK	2/1935	10.3.1936	10/1936 // 11.1943	stricken 8.1945, BU 3.1946	"H" group

Technical data

Displacement standard, t	1335 - 1370
Displacement full, t	1980 - 2095
Length, m	95.1 pp 98.5 oa
Breadth, m	10.1
Draught, m	3.96 - 4.06
No of shafts	2
Machinery	2 sets Parsons geared steam turbines, 3 Admiralty 3-drum boilers
Power, h. p.	34000
Max speed, kts	36
Fuel, t	443 - 461 oil
Endurance, nm(kts)	5530(15)
Armament	Ottawa: 2 x 1 - 120/45 QF Mk IX, 4 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 4 - 533 TT, 1 x 24 - 178 Hedgehog ASWRL, 4 DCT, 1 DCR (70 - 125 DC) Chaudiere: 2 x 1 - 120/45 QF Mk IX, 1 x 1 - 76/45 QF Mk I/II/III/IV, 4 x 1 - 20/70 Oerlikon Mk II/IV, 1 x 4 - 533 TT, 1 x 24 - 178 Hedgehog ASWRL, 4 DCT, 1 DCR (70 - 125 DC)
Electronic equipment	type 271, type 286/P radars, type 144 sonar
Complement	145

Standard scale images

Project history

Destroyers of 1933 program became repeats of predecessors of "Е" class, but at the expense of some machinery changes they had smaller displacement.

Experience of service of destroyers of early classes has revealed ability to refuse special cruising turbines (more truly, cruising stages in the common turbine unit). At little reduction of an endurance it allowed to simplify construction of turbine, raise its reliability, and also to decrease engine room length. Ships dimensions, at the expense of the last and restoration of a bulkhead between 1 and 2nd boiler rooms, became same as at the ships of "C" class. Decreasing of dimensions and displacement has allowed to decrease engine power from 36 000 to 34 000 hp. In remaining an internal arrangement and armament of ships repeated "Е" class. For reception of practical experience of usage quintuple TT mount one destroyer have equipped with them.

Outwardly "G" class destroyers differed from the "Е" class by presence of tripod main mast.

Ships of the 1934 program ("Н" class) became repetition of "G" except for new Mk XVII main gun mounts with natural gun balancing. 40° elevation angle was reached at the expense of shear of an axis of trunnions of a gun to a gate, that allowed more space for recoil at the maximum elevation angle. Two ships, ordered to Parsons, received new bridges with an oblique front unit: characteristic line of all subsequent British destroyers up to "Battle" class.Destroyers of "I" class repeated "Н", differing only by quintuple TTs.

Possibility of re-equipment of all of three destroyer classes into minelayers was provided.

Modernizations

1943-1944, presumably both: - type 286/M/P radar; + type 291 radar

1944, Ottawa: - 4 x 1 - 20/70; + 4 x 2 - 20/70 Oerlikon Mk II/IV

1944, Chaudiere: - 1 x 24 - 178 Hedgehog ASWRL; + 1 x 1 - 120/45 QF Mk IX

Naval service

No significant events.

© Ivan Gogin, 2015