HMS Resistance (1861)

HMS Resistance was the second of two s built for the Royal Navy in the 1860s. She was the first capital ship in the Royal Navy to be fitted with a ram and was given the nickname of Old Rammo. Resistance was initially assigned to the Channel Fleet upon commissioning, but was transferred to the Mediterranean Fleet in 1864, the first ironclad to be assigned to that fleet. She was rearmed in 1867 and became a guardship when recommissioned in 1869. The ship was reassigned to the Channel Fleet in 1873 before reverting to her former duties in 1877. Resistance was decommissioned in 1880 and was used for gunnery and torpedo trials beginning in 1885. The ship was sold for scrap in 1898 and foundered in 1899 en route to the breaker's yard. She was salvaged and later scrapped.

Design and description
The Defence-class ironclads were designed as smaller and cheaper versions of the Warrior-class ironclad armoured frigates. This meant that they could not fit the same powerful engines of the Warrior-class ships and were therefore 2 kn slower and had far fewer guns. The naval architect Sir Nathaniel Barnaby, a future Constructor of the Navy, considered that, in terms of combat, a Defence-class ship was worth one quarter of a Warrior.

HMS Resistance was 280 ft long between perpendiculars and 291 ft long overall. She had a beam of 54 ft and a draft of 26 ft. The ship displaced 6070 LT and had a ram in the shape of a plough, the first capital ship in the Royal Navy to be fitted with one. The hull was subdivided by watertight transverse bulkheads into 92 compartments and had a double bottom underneath the engine and boiler rooms. Resistance was 128 ft shorter overall and displaced over 3000 LT less than the Warrior-class ironclads.

Propulsion
The Defence-class ships had a single two-cylinder trunk steam engine made by John Penn and Sons driving a single 21 ft propeller. Four rectangular boilers provided steam to the engine at a working pressure of 20 psi. The engine produced a total of 2329 ihp. During sea trials on 25 August 1873, Resistance had a maximum speed of 11.4 kn. The ship carried 450 LT of coal, enough to steam 1670 nmi at 10 knots.

The ironclad was ship rigged and had a sail area of 24500 sqft. The lower masts and bowsprit were made of iron to withstand the shock of ramming. Resistance could make about 10.5 kn under sail and the funnel was semi-retractable to reduce wind resistance while under sail alone. The ship's propeller could be hoisted up into the stern of the ship to reduce drag while under sail. She was re-rigged as a barque from September 1864 to April 1866 before returning to her original ship rig.

Armament
The armament of the Defence-class ships was intended to be 18 smoothbore, muzzle-loading 68-pounder guns, eight on each side on the main deck and one each fore and aft as chase guns on the upper deck, plus four rifled breech-loading 40-pounder guns as saluting guns. This was modified during construction to six rifled 110-pounder breech-loading guns, ten 68-pounders and two 32-pounder smoothbore guns, the only such weapons ever mounted in a British ironclad. Both breech-loading guns were new designs from Armstrong and much was hoped of them. Four of the 110-pounder guns were installed on the main deck amidships and the other two became chase guns; all of the 68-pounder guns were mounted on the main deck. Firing tests carried out in September 1861 against an armoured target, however, proved that the 110-pounder was inferior to the 68-pounder smoothbore gun in armour penetration and repeated incidents of breech explosions during the Battles for Shimonoseki and the Bombardment of Kagoshima in 1863–64 caused the navy to begin to withdraw the gun from service shortly afterwards.

The 7.9 in solid shot of the 68-pounder gun weighed approximately 68 lb while the gun itself weighed 10640 lb. The gun had a muzzle velocity of 1579 ft/s and had a range of 3200 yd at an elevation of 12°. The 7 in shell of the 110-pounder Armstrong breech-loader weighed 107 - 110 lb. It had a muzzle velocity of 1150 ft/s and, at an elevation of 11.25°, a maximum range of 4000 yd. The 110-pounder gun weighed 9520 lb while the 40-pounder weighed 3584 lb. All of the guns could fire both solid shot and explosive shells.

Resistance was rearmed during her 1867–68 refit with fourteen 7-inch and two 8 in rifled muzzle-loading guns. The new guns were heavier so fewer could be carried. The shell of the 15-calibre 8-inch gun weighed 175 lb while the gun itself weighed 9 LT. It had a muzzle velocity of 1410 ft/s and was credited with the ability to penetrate a nominal 9.6 in of wrought iron armour at the muzzle. The 16-calibre 7-inch gun weighed 6.5 LT and fired a 112 lb shell. It was credited with the nominal ability to penetrate 7.7 in armour.

Armour
The Defence-class ships had a wrought iron armour belt, 4.5 in thick, that covered 140 ft amidships. The armour extended from upper deck level to 6 ft below the waterline. 4.5-inch transverse bulkheads protected the guns on the main deck. The armour was backed by 18 in of teak. The ends of the ship were left entirely unprotected which meant that the steering gear was very vulnerable. They were, however, sub-divided into many watertight compartments to minimize any flooding.

Construction and service
HMS Resistance was ordered on 14 December 1859 and laid down a week later by Westwood, Baillie at their shipyard in Cubitt Town, London. She was launched on 11 April 1861, commissioned in July 1862 and completed on 5 October at the cost of £258,120. After completion she served in the Channel Fleet until 1864 when she was transferred to the Mediterranean Fleet, the first British ironclad assigned to that fleet. In 1867 the ship was paid off in Portsmouth for refit and re-armament. Resistance recommissioned in 1869 as guardship in the River Mersey and served there until 1873 when she returned to the Channel Fleet. In 1877 the ship resumed her post as Mersey guardship until she was paid off in 1880 at Devonport.

In 1885 Resistance began to be used as a target for the testing of armour against the effects of torpedoes and gunfire. She was sold for scrap on 11 November 1898. She foundered in Holyhead Bay whilst under tow to the breakers on 4 March 1899 and was later raised and scrapped at Garston, Liverpool.