Hai class submarine

Hai-class Submarine
Class overview
Name	Hai-class Submarine
Builders	Telakka N:o 123 Ortonikkilä, Uusilinna
Planned	3
Built	3
Scrapped	3
General Characteristics
Type	Submarine
Displacement	113 long tons (115 t) surfaced 125 long tons (127 t) submerged
Length	19.5 metres (64 ft)
Beam	3.3 metres (11 ft)
Draught	2.9 metres (9.5 ft)
Propulsion	1 × gasoline engine(300 bhp (220 kW)) 1 × electric motor (120 hp (89 kW))
Speed	9 knots (17 km/h; 10 mph) (surfaced) 4.5 knots (8.3 km/h; 5.2 mph) (submerged)
Range	750 nmi (1,390 km; 860 mi) at 8 knots (15 km/h; 9.2 mph) (surfaced) 24 nmi (44 km; 28 mi) at 7 knots (13 km/h; 8.1 mph) (submerged)
Test depth	50 m
Complement	22
Armament	2 external 15-inch (381 mm) torpedoes on drop collars 1 × machinegun

Development

After the Far Eastern-Japanese war, the Imperial Navy begun massive fleet reconstruction program which was drafted after extensive studies of the war experience. One of the new emphasis in the building program was construction of submarines. Dalzavod in Vladivostok was ordered to provide navy a 4 new submarines. As the submarine development in Far Eastern Empire was non-existing, Dalzavod seeked assistance abroad. With already existing business link to various U.S shipbuilders, they turned into the help of american ship designer Simon Lake.

Characteristics

Typical "Lake" design early submarines. Intended to be re-engined with diesels prior to WWI but the plans were dropped in 1915.

Ships in class

All dates given are New Style:

Name	Builder	Laid down	Launch Date	Entered Service	Fate
PL-7	Dalzavod, Vladivostok	August 1907	August 1908	October 1909	Extant in 1920
PL-8	Dalzavod, Vladivostok	August 1907	August 1908	November 1909	Extant in 1920
PL-9	Dalzavod, Vladivostok	August 1907	August 1908	November 1909	Extant in 1920
PL-10	Dalzavod, Vladivostok	August 1907	August 1908	November 1909	Extant in 1920

See Also

Ships of Far Eastern Imperial Navy 1920