Jolly Roger Class
K II
Boats in this Class
K II

 

K II (Photo: © Collection G.D. Horneman).
.
K II (Photo: © Collection G.D. Horneman).

 

Boat K II
Yard # 272
Type Patrol submarine for the Dutch colonies
Class name K II. Named after first (and only) of class,
"K" stands for "KoloniŽn" (colonies)
Laid down 20 Nov 1915
Launched 27 Feb 1919
Commissioned 28 Mar 1922
Decommissioned Aug 1937
Fate ?
Design William Denny & Brothers, Dumbarton, U.K.
Hay-Denny type.
Shipyard Fijenoord, Rotterdam, the Netherlands
Le x Be x Dr 57.31 m x 5.29 m x 3.82 m
Displacement Stnd/Surf/Subm 507 t / 569 t / 649 t
Engines Two 8-cylinder M.A.N. diesel engines, 2-stroke, 2 x 900 apk
Main motor 2 motors/generators, 2 x 250 apk
Batteries 120 cells, 4350 Ah during 3 hours
Snort "Yes", see notes
Propellers 2
Speed surf/subm 15,5 kts / 8.5 kts
Range surf/subm 3500 nm at 11 kts / 25 nm at 8.5 kts
Diving depth 40 m
Complement 29
Torpedo tubes 2 x 18" bow, 2 x 18" external stern
Armament 12 torpedoes type II 45
Guns 1 x 7.5 cm, 1 x 12.7 mm mg (possibly Browning,
 but the Navy did not buy these until the late 1920's)
Periscopes Two, short stroke.
Notes Single-hull type, three main ballast tanks. Boat divided in watertight compartments with watertight doors. Because the German M.A.N. engine factory was to busy with her war contracts the M.A.N. diesels were installed and completed by the K.M.S. shipyard. This is why the K II, which was launched before the K III boats, commissioned after the K III class.

There are reports of snorting, at low speed, with K II type boats dating from as early as 1923/24. These boats had a "diesel air intake" that could be positioned above the wave breaker of the periscope. This intake was originally designed for use during bad weather when the sub was surfaced but the hatches had to be closed. Because of the inadequate valve system (to keep water out) this system did not perform well. See the O 2, O 16 and O 19 class for more snort info.

 

 

 

 

 

 

 

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