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fighting ships of the world

IMPERIAL RUSSIAN NAVY (RUSSIA)

SUBMARINES

POCHTOVYY submarine (1908)

Pochtovy 1909

Name No Builder Laid down Launched Comp Fate
Почтовый <Pochtovyy>   Metal Wks, St. Petersburg Spring 1906 10/1906 10/1908 stricken 8/1913

 

Displacement standard, t

 

Displacement normal, t

134 / 146 - 149

Length, m

36.0

Breadth, m

3.20

Draught, m

2.70

No of shafts

1

Machinery

2 petrol engines / 1 petrol engine

Power, h. p.

260 / 130

Max speed, kts

11.6 / 6.2

Fuel, t

petrol

Endurance, nm(kts) 530(6.2) / 27(6.2)

Armament

4 - 450 TC (ext cradles)

Complement

11
Diving depth operational, m

30 max

Ship project history: Drzewiecki design, construction funded by public subscription between workers of Russian mail service, so the submarine was named Pochtovyy <Mail>. The chief aim of the design was to provide a submarine with a single diesel propulsion when surfaced and submerged. Because of the lack of a suitable diesel engine in 1905 gasoline ones were fitted instead. These were supplied with oxygen from 45 air cylinders (10m3 of air under 500kgf/cm2 was carried) when submerged. Exhaust gases were ejected overboard by compressor jointed to a perforated pipe under the keel. With only 1 engine running she was able to cover 28 miles when submerged and 350 miles on two another engines when on the surface. The whole system proved reliable enough but further refinement was abandoned because of steam collecting inside the hull when the boat was submerged and the bubble wake on the surface.

Modernizations: 1910s: - 2 - 450 TC

Naval service: No significant events.

Pochtovyy 1908

 

 © Ivan Gogin, 2014