Ahven class submarine

Ahven-class Submarine
Class overview
Name	Ahven-class Submarine
Builders	Telakka N:o 124 Proletariaatti, Uusilinna
Planned	6
Built	6
Destroyed	1
Scrapped	5
General Characteristics
Type	Submarine
Displacement	416 long tons (423 t) surfaced 482 long tons (490 t) submerged
Length	41 metres (135 ft)
Beam	3.7 metres (12 ft)
Draught	4.9 metres (16 ft)
Propulsion	2 × gasoline engine(400 bhp (300 kW)) 2 × electric motor (200 hp (150 kW))
Speed	8.4 knots (15.6 km/h; 9.7 mph) (surfaced) 7.5 knots (13.9 km/h; 8.6 mph) (submerged)
Range	750 nmi (1,390 km; 860 mi) at 8 kt
Test depth	27 m
Complement	34
Armament	2 bow, 2 stern 18-inch (457 mm) torpedo tubes 2 37mm guns

Development

After completing the Hai class submarines, LTN felt that the fleet needed submarines with far greater capability and range. Therefore the follow-on class was intended to be larger, 400t design with improved seaworthiness. In all respect, the emerging Ahven was the first true combat capable submarine in TTPL service.

Ships in class

Name	Builder	Laid down	Launch Date	Entered Service	Fate
Ahven	Telakka N:o 124 Proletariaatti, Uusilinna	October 1905	July 1907	October 1908	Scrapped in 1918
Kuha	Telakka N:o 124 Proletariaatti, Uusilinna	December 1905	May 1907	October 1909	Scrapped in 1918
Karppi	Telakka N:o 124 Proletariaatti, Uusilinna	December 1905	May 1907	October 1909	Scrapped in 1918
Taimen	Telakka N:o 124 Proletariaatti, Uusilinna	March 1906	August 1907	April 1910	Sunk in 1915
Silli	Telakka N:o 124 Proletariaatti, Uusilinna	March 1906	August 1907	April 1910	Scrapped in 1918
Silakka	Telakka N:o 124 Proletariaatti, Uusilinna	March 1906	September 1907	May 1910	Scrapped in 1918

Service history

Minor modifications between 1914-15, plans to replace the gasoline engines with diesel engines were canceled at the outbreak of the Great War. Taimen was sunk in 1915 in the battle of Woiche Straits.

See Also

Ships of Workers' and Peasants' Red Fleet 1883-1922