Ariadne-class corvette
From Wikipedia, the free encyclopedia
Illustration of Ariadne, c. 1871 | |
| Class overview | |
|---|---|
| Name | Ariadne class |
| Builders | Kaiserliche Werft, Danzig |
| Preceded by | Augusta-class corvette |
| Succeeded by | Leipzig-class corvette |
| Built | 1868–1876 |
| In service | 1872–1896 |
| Completed | 3 |
| Scrapped | 3 |
| General characteristics | |
| Type | Screw corvette |
| Displacement | Full load: 2,072 metric tons (2,039 long tons) |
| Length | 68.16 meters (223 ft 7 in) (loa) |
| Beam | 10.8 m (35 ft 5 in) |
| Draft | 4.8 m (15 ft 9 in) |
| Installed power |
|
| Propulsion |
|
| Sail plan | Full-rigged ship |
| Speed | 14 knots (26 km/h; 16 mph) |
| Range | 1,340 nautical miles (2,480 km; 1,540 mi) at 10 kn (19 km/h; 12 mph) |
| Crew |
|
| Armament |
|
The Ariadne class was a group of three screw corvettes of the North German Federal Navy and Imperial Navy, built in the 1860s and 1870s. The class comprised three ships: Ariadne, Luise, and Freya. The first two vessels were identical, but Freya was built to a modified design with a longer hull, which allowed her to carry more powerful engines and additional coal for the boilers. The ships were ordered as part of a naval construction program directed at strengthening the North German Federal Navy, though by the time they entered service, all of the German states had united into the German Empire. They were intended to serve on extended cruises abroad, protecting German interests overseas. Their primary armament consisted of six or eight 15 cm (5.9 in) guns, and they were fitted with full ship rigs to supplement their steam engines on long voyages abroad.
All three of the ships served extensively on overseas deployments throughout the 1870s and early 1880s, primarily in South America, the Mediterranean Sea, and East Asia. On these voyages, the ships and their captains performed a number of duties, including protecting German nationals during periods of unrest or open warfare in various countries, negotiating trade agreements with numerous governments, and combating piracy. They were also tasked with conducting surveys to improve navigational charts and scientific experiments.
In the early to mid-1880s, all three of the ships were converted into training ships for apprentice seamen, and they went on training cruises over the course of the rest of the decade. These frequently went to the West Indies, where they were used to show the flag. While on one such training cruise in 1883, Freya helped to protect civilians in Haiti during a period of unrest on the island. All three ships were decommissioned by 1892, with Ariadne being immediately scrapped. Luise survived as a hulk and torpedo test ship until 1896 when she too was sold for scrap, and Freya simply saw no further use between her decommissioning in 1884 and her disposal in 1896.
General characteristics
In 1867, the North German Admiralty under the direction of Konteradmiral (Rear Admiral) Eduard von Jachmann formulated a new fleet plan, an expansion program aimed at strengthening the North German Federal Navy in the wake of the Austro-Prussian War. The plan called for a total of twenty screw corvettes, which were intended to be used to protect German economic interests abroad. At the time, German commercial interests began to expand to overseas markets in Asia and the Pacific, which required long-range cruising warships, particularly as other European powers started to exclude German businesses from activity abroad.[1] The Admiralty issued an order on 15 February 1868 to begin construction of a new class of corvettes; at the same time, the contract for the first ship, to be named Ariadne, was awarded to the Königliche Werft (Royal Shipyard) in Danzig.[2] Design work on the class was completed in 1869, the same year construction began on the first vessel. Freya was the last wooden-hulled vessel of the German fleet. She was built to a slightly different design, essentially having a lengthened hull, with the increased space being used to house more powerful machinery and additional coal storage for an extended cruising radius.[3][4] The three vessels were the first cruising ships of the German fleet to carry breech-loading guns.[5]
The Ariadne-class ships were 65.8 meters (215 ft 11 in) long at the waterline and 68.16 m (223 ft 7 in) long overall. They had a beam of 10.8 m (35 ft 5 in) and a draft of 4.8 m (15 ft 9 in) forward and 5.7 m (18 ft 8 in) aft. They displaced 1,692 metric tons (1,665 long tons) as designed and up to 2,072 t (2,039 long tons) at full load. The ships' hulls were constructed with transverse timber frames, with the outer hull being carvel built. They were sheathed with copper to protect the wood from biofouling on long-distance cruises, where regular maintenance could not be performed. Freya had four watertight compartments, while the earlier two ships had none.[3][4]
Over the course of their careers, the ships' crews varied between 13 and 14 officers and 220 to 234 enlisted men. Each ship carried a number of small boats, including two pinnaces, two yawls, and three dinghies. The ships were excellent sea boats, but they suffered from severe weather helm, they sailed badly, and they were not maneuverable vessels under sail. Freya was particularly difficult to steer. The ships' propeller did not rotate freely from the shaft at low speed, and so it had a significant braking effect under sail. Despite their characteristics under sail, they maneuvered quite well under steam.[3]
Machinery

The ships were powered by a single 3-cylinder marine steam engine that drove one 4-bladed screw propeller. The first two ships' screws were 4.56 m (15 ft) in diameter, and Freya's was 5.34 m (17 ft 6 in) wide. Steam was provided by four coal-fired fire-tube boilers, which were ducted into a single, retractable funnel. As built, the Ariadne-class ships were equipped with a full ship rig, but this was later reduced to a barque rig in all three vessels. Steering was controlled with a single rudder.[3][4]
The first two ships were rated at a top speed of 14 knots (26 km/h; 16 mph) from 2,100 metric horsepower (2,100 ihp), but they both slightly exceeded those figures on speed trials, both making 14.1 knots (26.1 km/h; 16.2 mph) at 2,260 to 2,392 PS (2,229 to 2,359 ihp). Freya was designed to have a speed of 14.5 knots (26.9 km/h; 16.7 mph) from 2,400 PS (2,400 ihp), but she reached a speed of 15.2 knots (28.2 km/h; 17.5 mph) from 2,801 PS (2,763 ihp) on trials. Ariadne and Luise could carry 168 t (165 long tons) of coal, while Freya could carry 264 t (260 long tons). The first two ships had a cruising radius of 1,340 nautical miles (2,480 km; 1,540 mi) at a speed of 10 knots (19 km/h; 12 mph), which reduced to 630 nmi (1,170 km; 720 mi) at a speed of 13 knots (24 km/h; 15 mph). Freya had significantly more endurance, owing to her increased coal supply, being capable of steaming for 2,500 nmi (4,600 km; 2,900 mi) at 10 knots and 1,060 nmi (1,960 km; 1,220 mi) at 15 knots (28 km/h; 17 mph).[3]
Armament
Ariadne and Luise were armed with a battery of six 15 cm RK L/22 breech-loading guns, which had a length of 22-calibers. There were also two 12 cm (4.7 in) L/23 guns, all on the broadside. Of the 15 cm guns four were on sliding carriages for changing gunport. The guns were supplied with 400 rounds and 200 rounds, respectively. In 1882, they had four 37 mm (1.5 in) Hotchkiss revolver cannon installed. Freya, instead, had eight and later seven 15 cm 22-cal. guns with 760 shells and four 17 cm (6.7 in) 25-cal. guns, though the latter were removed early in her career; these were also broadside guns. In 1881, she also received six 37 mm Hotchkiss revolver cannon.[3][4]

