NAVYPEDIA

Photo

Urchin

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Trenchant	G96, G78		White, Cowes	7.1916	23.12.1916	4.1917	BU 5.1928
Tristram	F89, F25		White, Cowes	9.1916	24.2.1917	6.1917	BU 5.1921
Undine	G97, G79		Fairfield, Govan	1916	22.3.1917	5.1917	BU 4.1928
Ulysses	F80, G96, G77		Doxford, Pallion	8.1916	24.3.1917	6.1917	collision 29.10.1918
Tower	F98, F24		Swan Hunter, Wallsend	1916	5.4.1917	8.1917	BU 5.1928
Tirade	F81, G80		Scotts, Greenock	1916	21.4.1917	6.1917	BU 1.1921
Urchin	F95, F04		Palmers, Jarrow	1916	7.6.1917	8.1917	BU 1.1930
Umpire	F94, F26		Doxford, Pallion	1916	9.6.1917	8.1917	BU 1.1930
Ursa	F10		Palmers, Jarrow	1916	23.7.1917	10.1917	BU 7.1926
Ursula	F88, F84, F01		Scotts, Greenock	1916	2.8.1917	9.1917	BU 11.1929
Ulster	F91, F17		Beardmore, Dalmuir	9.1916	10.10.1917	11.1917	BU 4.1928

Technical data

Displacement normal, t	975
Displacement full, t	1225 - 1242
Length, m	84.1
Breadth, m	8.14
Draught, m	2.75
No of shafts	2
Machinery	Tirade, Tower, Ulster, Ulysses, Umpire, Undine, Ursula: 2 sets Brown-Curtis geared steam turbines, 3 Yarrow boilers Tristram, Trenchant: 2 sets Brown-Curtis geared steam turbines, 3 White-Forster boilers Urchin, Ursa: 2 sets Parsons geared steam turbines, 3 Yarrow boilers
Power, h. p.	27000
Max speed, kts	36
Fuel, t	oil 296
Endurance, nm(kts)	3440(15)
Armament	3 x 1 - 102/40 QF Mk IV, 1 x 1 - 40/39 2pdr QF Mk II, 2 x 2 - 533 TT
Complement	82

Graphics

Project history

Out of the last 26 'R' class ordered in March 1916 only 15 were completed to the original design. Despite all the minor improvements reports from the various commands and flotillas showed that bridges needed to be as far aft as possible, to protect personnel, and hulls needed to be stronger to cope with the exceptional stresses of constant hard driving in heavy weather. The 'Modifed R' class had No 1 and No 2 boiler rooms transposed, allowing the uptakes to be combined in one fatter funnel and making space for the forward gun and bridge to be moved aft. New CP.III 102mm mountings had 30° elevation, increasing range from 9,100m to 10,900m. Trenchant, the lead-ship, and her sister Tristram had their funnels made on thin plating, with distinctive ribs to strengthen them. Undine made 36.5kts on trials, in light condition.

Modernizations

Some destroyers after commission: + 2 - 356 TT (beam)

Naval service

Ulysses collided with s/s Ellerie in Clyde 29.10.1918.