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. The 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
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
Displacements Normal or trial: 14,508 metric tons Full load: 15,854.5 metric tons Machinery 12 coal fired 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
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 fire: 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 fire: 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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