One of the Imperial Navy's 1897 99 Fleet expansion plans, Pangu-class battleship, Western code name: Hercules-class first-class battleship.

As the first battleship developed and built by the Empire, it is definitely worthy of its name. The original intention of this class of ships was to fight against the Retvisan, the United States, the main battleships of the Russian Far East Fleet, and the Prince built by France. Since the Pangu-class battleship adopts the latest three-inflated reciprocating steam engine developed by Germany, that is, it is improved on the engine of the large armored cruiser of the German Bismarck, the fastest speed on the battleships of the same level was only 19.5 knots, while the Pangu-class battleships reached 21 knots, so the Pangu-class battleships took advantage of the speed.

This class of ships was built by Pearl Harbor Shipyard, and two ships of the same class were built. They adopted the German new three-expansion reciprocating steam engine technology, becoming the fastest battleship among the main battleships at that time. In addition, they incorporated Germany's advanced Krupp armor technology, and first added titanium-nickel alloy elements to the steel armor, which greatly increased the strength and weight of the steel armor, and the remaining tonnage could improve the firepower device and power system space. Although the number of 305mm main guns could not be increased, the number of rapid-fire artillery of 203mm and 152mm increased, which greatly improved the lethality of Pangu-class battleships at medium and short distances. With the advantages of firepower and speed, it is known as a quasi-dreadnought. Facts have proved that this class of ships was the most powerful main battleship before the appearance of the Fearless Class battleship.

Date of launch 1900

Displacement:

14,770 tons light load; 15,585 tons standard; 16,900 tons normal; 17,952 tons full load

Size: Full length/waterline x maximum width x draft

426.51 feet / 426.51 feet x 75.46 feet x 28.87 feet (normal loading)

130.00m/130.00m x 23.00m x 8.80m

arms:

4-12.01 inch/305mm cannon (2x2 cannon), 865.70 lb/392.67 kg shell, Type 1900

Rapid-fire cannon is installed in a rotating turret (on the turret seat)

At the center line, evenly distributed

8-7.99 inch/203mm cannon (4x2 cannon), 255.24 lb/115.77 kg shell, Type 1900

Rapid-fire cannon is installed in a rotating turret (on the turret seat)

On both sides, all in the middle of the ship

10-5.98 inch/152 mm gun in single-mounted gun stand, 107.15 lb/48.60 kg shell, Type 1900

Rapid-fire gun is installed on the side gun mount

On both sides, evenly distributed

8-2.99 inch/76.0 mm gun in single-mounted gun stand, 13.39 lb/6.08 kg shell, Type 1900

Breech gun is installed on the deck gun mount

On both sides, evenly distributed

The side weight is 6,683 lbs/3,032 kg

Each gun is equipped with ammunition, main gun group: 120

2-17.7 inch/450mm water torpedo launch tube

Armor:

- Armor belt: width (maximum) length (average) height (average)

Main: 9.06 inches/230 mm347.77 feet/106.00 meters13.12 feet/4.00 meters

Bow and Stern: 2.36 inches/60 mm98.43 feet/30.00 meters13.12 feet/4.00 meters

Upper: 5.98 inches/152 mm196.85 feet/60.00 meters8.01 feet/2.44 meters

Main armor belt covers 125% of normal length

- Artillery armor: front (maximum) other artillery chambers (average) turret mount/ground well speed-replacement gun (maximum)

Main gun group: 12.0 inches/305 mm2.99 inches/76 mm10.0 inches/254 mm

Level 2: 5.98 inches/152 mm－

Level 3: 2.99 inches/76 mm－

- Armored deck: 1.97 inches/50 mm, Command tower: 12.01 inches/305 mm

Turbine unit:

Coal-fired boiler, three-surge reciprocating steam turbine,

Direct transmission, 2 axles, 27,872 indicating horsepower/20,793 kW = 21.00 knots

Range of 7,000 nautical miles at 10.00 knots

Fuel silo load capacity at maximum displacement = 2,368 tons (100% coal)

Staffing:

740-963

Cost:

￥1.828 million/$7.314 million

Normal displacement weight:

Armed: 835 tons, 4.9%

Armor: 4,388 tons, 26.0%

- Armored belt: 2,313 tons, 13.7%

- Torpedo protective wall: 0 tons, 0.0%

-Armed: 1,018 tons, 6.0%

- Armored deck: 887 tons, 5.2%

- Command tower: 170 tons, 1.0%

Turbine unit: 4,355 tons, 25.8%

Hull, accessories & equipment: 5,191 tons, 30.7%

Fuel, ammunition and supply: 2,130 tons, 12.6%

Miscellaneous Weight: 0 tons, 0.0%

Total survivability and wave resistance:

Survivability (non-lethal penetration shot required to sink the ship):

11,002 lbs/4,990 kg = 12.7x12.0 inches/305 mm shells or 1.4 torpedoes

Stability (not firm below 1.00): 1.16

Fixed inclination center height 4.3 feet/1.3 meters

Roll cycle: 15.3 seconds

Stability - as a shelling platform (average = 50%): 70%

-Recoil effect (limiting angle should not exceed 1.00): 0.74

Hangyang Performance (Average = 1.00): 1.40

Hull linear features:

The hull has a rising central ship front end

Fill coefficient: 0.637

Aspect ratio: 5.65:1

Under the hull length factor, ‘Normal speed’: 20.65 knots

Power transfer wave formation at maximum speed: 55%

Adjustment (maximum stability = 0, maximum robustness = 100): 50

bow image (positive angle = bow image forward): -5.00 degree angle

Tail extension: 0.00 feet/0.00 meters

Freeboard height (% = percentage of measured position and total length):

-Bow: 26.25 feet/8.00 meters

-Front deck (20%): 22.97 feet/7.00 meters

-Central (60%): 22.97 feet/7.00 meters (16.40 feet/5.00 meters Stern Boat End)

- Rear deck (20%): 16.40 feet/5.00 meters

-Stern: 16.40 feet/5.00m

-Average freeboard height: 20.60 feet/6.28 meters

Boat space, power and evaluation:

Space-hull waterline (ammunition depot/machine bin, low = better): 123.8%

-Above the waterline (living/working area, high = better): 130.2%

Water machine area: 24,352 square feet or 2,262 square meters

Displacement factor (displacement/load): 85%

Structural weight/hull surface area: 140 psi/sq.ft. or 681 kg/sq.m.

Hull strength (relative value):

- Cross-sectional strength: 0.90

-Longitary strength: 2.80

-Comprehensive strength: 1.00

The hull space of the turbine warehouse, storage warehouse, and watertight warehouse is crowded

Excellent living and working areas for people

The ship has a slow and calm roll, and an excellent and stable artillery platform

Good air-to-ocean properties can safely survive bad weather
Chapter completed!