HMS TETRARCH
HMS TETRARCH
R-class Destroyer
Builder……………Harland and Wolff, Govan, Glasgow
Laid down……….July 1916
Launched………..20 April 1917
Commissioned..June 1917
Fate………………...Broken up July 1934 by Metal Industries at Rosyth
Machinery……….2 screws each drive by Brown-Curtis geared steam turbines with steam supplied by 3 Yarrow boilers.
Maximum Speed 36 knots
Pennant Numbers worn by the vessel
F87………………June 1917 – August 1917
F74………………January 1918 – October 1918
???.................1918 - 1925
H59………………1925 - 1934
GENESIS OF R-CLASS DESTROYERS
In July 1915 the Admiralty Board gave approval for all future destroyers to be engined with 2-shaft geared turbines, preferably Brown-Curtis. This far-sighted move was made only on the basis of the success of a year's service in Leonidas and Lucifer. The design for the next batch of destroyers was in other respects merely a duplication of the standard 'M' design, but with more flare and 0.3m more freeboard on the forecastle. Other improvements were to put the after 102mm gun on a 'bandstand', and a more robust bridge structure. The design which resulted was generally similar ro the war-built 'M' class, with three round funnels. Because the bridge was 2.7m wider than previously the 40mm pom-poms formerly mounted at the end of the forecastle could not be mounted, and so a single pom-pom replaced the 509mm searchlight on its platform between the TT. Some 'M' and 'R' class vessels had 2 356mm TT (one fixed on each beam) subsequently added at the break of the forecastle. The geared turbines were a great success, providing high speed with less cavitation and reduced fuel consumption. The lead-ship Romola maintained 36kts for 4 hours in light condition, and on her acceptance trials reached 32.5kts in deep load condition. Comparative trials run between Romola and Norman showed that the 'R' class used 15% less fuel at 18kts and 28% less at25kts, resulting in an increase of 17.8% and 40% of range. The Yarrow 'specials' were the only units to retain direct-drive turbines. Oil fuel was also increased compared with the 'M' class.
HMS TETRARCH
HMS TETRARCH
R-class Destroyer
Builder……………Harland and Wolff, Govan, Glasgow
Laid down……….July 1916
Launched………..20 April 1917
Commissioned..June 1917
Fate………………...Broken up July 1934 by Metal Industries at Rosyth
Machinery……….2 screws each drive by Brown-Curtis geared steam turbines with steam supplied by 3 Yarrow boilers.
Maximum Speed 36 knots
Pennant Numbers worn by the vessel
F87………………June 1917 – August 1917
F74………………January 1918 – October 1918
???.................1918 - 1925
H59………………1925 - 1934
GENESIS OF R-CLASS DESTROYERS
In July 1915 the Admiralty Board gave approval for all future destroyers to be engined with 2-shaft geared turbines, preferably Brown-Curtis. This far-sighted move was made only on the basis of the success of a year's service in Leonidas and Lucifer. The design for the next batch of destroyers was in other respects merely a duplication of the standard 'M' design, but with more flare and 0.3m more freeboard on the forecastle. Other improvements were to put the after 102mm gun on a 'bandstand', and a more robust bridge structure. The design which resulted was generally similar ro the war-built 'M' class, with three round funnels. Because the bridge was 2.7m wider than previously the 40mm pom-poms formerly mounted at the end of the forecastle could not be mounted, and so a single pom-pom replaced the 509mm searchlight on its platform between the TT. Some 'M' and 'R' class vessels had 2 356mm TT (one fixed on each beam) subsequently added at the break of the forecastle. The geared turbines were a great success, providing high speed with less cavitation and reduced fuel consumption. The lead-ship Romola maintained 36kts for 4 hours in light condition, and on her acceptance trials reached 32.5kts in deep load condition. Comparative trials run between Romola and Norman showed that the 'R' class used 15% less fuel at 18kts and 28% less at25kts, resulting in an increase of 17.8% and 40% of range. The Yarrow 'specials' were the only units to retain direct-drive turbines. Oil fuel was also increased compared with the 'M' class.