Design
In 1794, a frigate squadron under the command of Captain Sir John Borlase Warren captured the French 40-gun frigate Pomone. Surprisingly to her captors, the ship was armed with 26 × 24-pounder long guns, a main armament that was relatively uncommon for frigates in the 18th century. Furthermore, Pomone impressed the British with outstanding sailing qualities in every variation of the wind, and being capable of sailing more than 13 knots (24 km/h; 15 mph).
On 30 April 1795, the Admiralty ordered three frigates – with 36 guns, 38 guns and 40 guns – the first and third built to the lines of the captured French frigate and the second to a new design by the Surveyors (the ship designers of the Royal Navy). The 40-gun French design was copied from Pomone, and in November 1795 the keel was laid down at the Rotherhithe shipyard of John Randall & Company for the new ship, which on 14 November 1795 was named as HMS Endymion. She was launched on 29 March 1797 and towed to Deptford Dockyard, where she was commissioned in April 1797 and completed on 12 June 1797.
Endymion was not an exact copy of Pomone, being built to British design standards with stronger construction. Surprisingly, Endymion sailed even better than Pomone, reaching 14.4 knots (26.7 km/h; 16.6 mph), the highest recorded speed during the Age of Sail. Reclassified as a 48-gun fourth-rate frigate in February 1817, then as 50-gun, and finally as 44-gun in February 1839, Endymion's fine qualities were such that she continued to be praised for nearly half a century. She was finally broken up at Plymouth Dockyard in June 1868.
1812 Programme
Early in 1812, war with the United States seemed inevitable. To cope with the heavy American 24-pounder frigates of the Constitution-type, the Admiralty decided to build a batch of new 24-pounder frigates. During the long war with France, the standard British frigate was of about 1,000 tons and armed with a main battery of only 18-pounders, no match for the big US ships. The only proven design for a suitable 24-pounder frigate was that of Endymion, and in May 1812 two ships were ordered from Wigram, Wells & Green of Blackwall Yard, who were to construct all five ships eventually built. They differed from the prototype by being constructed of "fir" (actually, pitch pine) rather than oak, and mounted an extra (fourteenth) pair of 24-pounder guns on the upper deck forward. All would be reclassified as 50-gun fourth-rate frigates in February 1817; however, the use of softwood in their construction was such that they were only intended for a short lifetime, and indeed all five were taken to pieces after a few years' service.
The first pair were originally ordered on 4 May 1812 as Tagus and Eridanus of the 18-pounder armed Leda class, but were renamed on 7 January 1813 as Severn and Liffey. The War of 1812 broke out in June, and on 26 December two further ships were ordered, becoming Glasgow and Liverpool. The final ship was Forth, ordered on 7 January 1813. These five new ships were of a slightly modified design, having ports for 28 instead of 26 × 24-pounders and were built of softwood, to speed up the construction. The ships were launched from June 1813 to February 1814.
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HMS Endymion was a 40-gun fifth rate that served in the French Revolutionary Wars, the Napoleonic Wars, the War of 1812 and during the First Opium War. She was built to the lines of the French prize Pomone captured in 1794. Due to her exceptional handling and sailing properties, the Severn-class frigates were built to her lines, although the gunports were rearranged to mount an extra pair of guns per side, the ships were made of softwood and were not built until nearly the end of the Napoleonic Wars.
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Royal Navy