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Thursday, 11 February 2016

German Blohm&Voss shipyard designed battleship for the Royal Netherlands Navy in 1912-1914


In the first part of the 20th Century was the Netherlands Royal Navy interested in obtaining (nine) dreadnoughts mainly for the defence of the Dutch East Indies. While Dutch shipyards were not able at that moment to build such warships were tenders asked from foreign shipyards. Namely the German shipyards Friedrich Krupp Germaniawerft at Kiel, Blohm&Voss at Hamburg, Vulcan Werke at Stettin, Schichau at Danzig, A.G. Weser, at Bremen, the British shipyards of Sir W.G. Armstrong, Elswick, Vickers at London, Beardmore at Glasgow and the Conventry Syndicate/Fairfield Shipbuilding&Co. at London and the Italian shipyards of Stabilimento Technico at Triest and Ansaldo at Sestri Ponente.

The armament was to consist of :
4x2-35.6cm/14” /45 breech loading guns in barbettes placed on the centre line, 4 guns were to fire straight ahead, 4 right astern and 8 on each broadside over the greatest possible sector on each side and for each gun 100 rounds;
16-15cm/6” quick firing /50 in casemates with 250 round for each gun. At least 4 guns were to fire straight ahead and 4 right astern and also a few degrees over the other side of the centre line and
12-7,5cm/3” quick firing guns without gun shields to be used as anti-balloon artillery as far as they were not mounted between decks, for each gun 300 pounds.
4-21” broadside submerged torpedo tubes. The 2 foremost torpedo tubes were to fire 10-15 degrees before the beam, the 2 backward torpedo tubes 10-15 degrees abaft the beam and for each gun 3 torpedoes.

While the Royal Netherlands Navy since decades for the main armament her ships fitted out with Krupp guns which performed always well and was trusted by the Dutch naval personnel was a strong preference for Krupp guns on the battleships to be built.

Main armour belt at least 25cm thick, sloping to the fore and aft ends with the lower limit no rising out of the water with the ship trimmed to trial displacement heeled over an angle of minimum 7 degrees. The 6” gun casemates were to protected by 18cm thick armour, the barbettes and conning tower by at least 30cm thick armour. Further more armoured decks and bulkheads and the lower parts of the funnel protected. The armour was to made of Krupp cemented steel. Longitudinal nickel steel made bulkheads, torpedo nets and booms were to be used as anti torpedo protection.

Accommodation required for 35 officers, 15 engineers, 19 warrant officers, 36 petty officers and around 800 sailors.

As the battleship was to serve in the tropics [the Dutch East Indies] were good cooling devices for the ammunitions a necessity. There were two separate similar refrigerating plants acquired, each able to cool all ammunition magazines at the same time to a maximum allowed temperature of 28 degrees.

Blohm&Voss came with a design of 26.473 tons/26.055 long tons. Displacement 26.473 tons/26.055 long tons: hull 7.630 tons/7.510 long tons, armour 9.118 tons/8.974 long tons, engines 2.107 tons/2.074 long tons, armament 3.758 tons/3.699 long tons, fuel 3.030 tons/2.982 long tons, equipment 1.580 tons/1.555 long tons and margin 265 tons/261 long tons. The armour belt had a thickness of 10cm (stern)-15cm (bow)-25cm (amidships). The 6 double-ended oil-fired boilers supplied 38.000 ship via 4 screws allowing a design speed of 22 knots.

Sources
Archive Kon. Mij. De Schelde 1875-1970 (Municipality Archive Vlissingen, Netherlands) inventory number 214.1818.
https://en.wikipedia.org/wiki/Dutch_1913_battleship_proposal