Technical Data of the Radetzky Class

fect in 1913, which envisaged joint operations in the Western Mediterranean, the Navy began in 1914 to repaint their battleships in the so called “Hausblau” (Haus blue, light grey) livery. Th e light grey color of the new livery was better suited for the open waters of the Mediterranean. After the outbreak of the war, gun turret and conning tower roofs were painted in dark grey. Until the end of the war the “Hausblau” remained the standard livery of the battleships and smaller units.

Technical Data of the Radetzky Class

Length on waterline: 137.45 m Overall length: 138.78 m Beam: 24.6 m Draught: 8.06 m

Displacements Normal or trial: 14,508 metric tons Full load: 15,854.5 metric tons

Machinery 12 coal fi red Yarrow water tube boilers with oil spraying, 4296 m² heat transfer surface area Boilers in two boiler rooms, two funnels 2 four cylinders triple expansion vertical reciprocating steam engines on two shafts Steam engines in two machinery rooms divided by a longitudinal watertight bulkhead Two screws of 5220 mm diameter Design power: 20,000 SHP Erzherzog Franz Ferdinand 20,600 SHP 20.58 knots Radetzky 19,437 SHP 20.16 knots Zrínyi 20,000 SHP 20.97 knots Fuel: coal 1,600 tons or briquette 1,360 tons, oil 150 tons Range: 5,200 nm at 10 knots with coal or 4,300 nm at 10 knots with briquette, 1,500 nm at 20 knots with coal or 1,250 nm at 20 knots with briquette

Armor (KC: Krupp cemented, K: Krupp non-cemented,

SM: Siemens-Martin) Belt: 230 mm KC, lower part tapered to 180 mm

KC Upper belt: 150 mm KC Casemate: 120 mm KC Bow/stern: 100/100 mm KC Fore and aft armored bulkheads: 150 mm KC Fore conning tower/roof: 250 mm KC/60 mm K Aft conning tower/roof: 120 mm KC/40 mm K 30.5 cm barbettes: 250 mm KC 24 cm barbettes: 200 mm KC Armor deck/torpedo bulkhead: 48-36/54 mm SM 30.5 cm gun turrets face/side/inclined part/roof: 250/250/150 mm KC/60 mm K 24 cm gun turrets face/side/inclined part/roof: 200/200/120 mm KC/50 mm K

Armament 4×30.5 cm/45 Škoda guns with sliding wedge breech (Krupp-system) Weight of the gun turrets 439 metric tons Weight of barrel with breech: 54.63 metric tons Elevation: -4º/+20º Elevation/train rate: 3º per sec/3º per sec Allowance for each gun: 75 Projectile’s weight: 450 kg Muzzle velocity: 800 mps Rate of fi re: 1-2 rounds per minute Range: N/A (Estimated range 18,500 m at +20 º)

8×24 cm/45 Škoda guns with sliding wedge breech (Krupp-system) Weight of the gun turrets: 238.8 metric tons Weight of barrel without breech: 26.9 metric tons Elevation: -4º/+20º Elevation/train rate: 3º per sec/3º per sec Allowance for each gun: 100 Projectile’s weight: 215 kg Muzzle velocity: 800 mps Rate of fi re: 2 rounds per minute Range: N/A (Estimated range 16,500 m at +20º)

20×10 cm/50 Škoda guns with sliding wedge breech in casemates Weight of barrel: 2020 kg Elevation: -4º/+15º Weight of the ammunition: 26.2 kg Allowance for each gun: 300 Projectile’s weight: 14.5 kg Muzzle velocity: 880 mps

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Rate of fi re: 15 rounds per minute Range: 11,000 m

6×7 cm/50 (6.6 cm) Škoda AA guns with sliding wedge breech on central pivots on turret roofs Weight of a gun with mounting: 2030 kg Elevation: -5°/+90° Weight of the ammunition: 8.5 kg Allowance for each gun: 200 Projectile’s weight: 4.5 kg Muzzle velocity: 830 mps Rate of fi re: 20 rounds per minute

3×45 cm Whitehead submerged torpedo tubes (1 bow, 1-1 broadsides) Allowance: 3 torpedoes per tube Torpedo’s weight: 631 kg Overall length: 5.2 m Explosive charge: 110 kg

Fire control 2×2743 mm (9 feet) Barr&Strouds rangefi nders on the top of the fore and aft conning towers 2×2743 mm (9 feet) Barr&Strouds rangefi nders on the top of the battery commando post in the superstructure 6×90 cm searchlights as built 8×110 cm and 2×90 searchlights from 1915

Boats (2×13 ton boats crane) Erzherzog Franz Ferdinand starboard crane is pointing to the bow, port crane is pointing to the stern Radetzky starboard crane is pointing to the stern, port crane is pointing to the bow Zrínyi both cranes are pointing to the bow 1×13 tons steam barge 1×9 tons motor barge 2× barges 3× cutters 1× rescue cutter 3× gigs 6× jolly boats

Complement 30 offi cers, 846 men Call signals Erzherzog Franz Ferdinand: BJ and 60,021 Radetzky: BR and 60,022 Zrínyi: BY and 60,023

Commanders (Lschk: Linienschiff skapitän)

Erzherzog Franz Ferdinand Lschk Georg Ritter von Kirchmayr 16 June 1910 Lschk Josef Ritter von Schwarz 13 October 1910 Lschk Oskar Gassenmayr 30 April 1911 Lschk Richard Ritter von Barry 18 October 1911 Lschk Oskar Hansa 20 August 1912 Lschk Hugo Zaccaria 23 April 1913 Lschk Kamillo von Schwarzl 5 March 1914 Lschk Ferdinand Ritter von Purschka 19 June 1917 – 15 February 1918 Lschk Heinrich Freiherr Pergler von Perglas 10

March 1918 – 14 April 1918 N/A

Radetzky Lschk Paul Fiedler 11 January 1911 Lschk Maximus Freiherr von Hauser 20 October 1911 Lschk Franz Ritter von Keil 8 January 1912 Lschk Franz Löffl er 3 May 1912 Lschk Gottfried Freiherr Meyern von Hohenberg 3 September 1912 Lschk Kamillo Teuschl 20 August 1913 Lschk Vitus von Vončina 8 March 1914 Lschk Marius Ratković 2 August 1917 – 13 March 1918 N/A

Zrínyi Lschk Lino Lius 1 September 1911 Lschk Alfred Freiherr von Koudelka 4 September 1912 Lschk Maximilian Daublebsky von Eichhain 14 August 1913 Lschk Alois Schusterschitz 16 September 1917 – 17 March 1918 N/A

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Pages 47-50: 21 Plans of the Radetzky

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