# The Development of Navies During the Last Half-Century/Chapter 3

CHAPTER III
BROADSIDE IRONCLADS
Prejudice against Iron in Shipbuilding—First Ironclads built in France and England—Increase in Size of Ships—Advance in Ordnance—Commencement of Struggle between Guns and Armour—Action between 'Alabama' and 'Kearsage,' showing advantages of Armour.
The same reasons which operated on the minds of the naval officers in respect to the application of steam propulsion retarded the use of iron for the construction of war vessels. That material was first employed for canal boats about the year 1812, and afterwards for steamers of the mercantile marine. About 1834 the Admiralty were urged to institute experiments to ascertain whether iron might not be utilised for ships of war, but they moved so slowly that the first iron war steamer built in this country was the 'Birkenhead,' by Messrs Laird, in 1845. For reasons to be mentioned presently she was turned into a troopship. She was lost in 1852 at the Cape, under the circumstances well known from the heroic conduct of the soldiers and seamen on the occasion. To test the behaviour of iron under the effects of shot, and to compare it with wood, some experiments were carried out at Portsmouth from 1849 to 1851. Iron plates, ⅝ in. thick, placed 35 ft. apart, to represent a section of the 'Simoom,' a vessel ​then under construction, were fired at from a 32-pounder. The effect was most ominous. Not only were the iron splinters produced by the shot passing through the side of a destructive nature, but it was found that the shot broke up in perforating the plate, and became an additional cloud of splinters too numerous to be counted. The experiment was repeated with the addition that the iron was backed with 5 in. of oak. A similar result ensued, but wooden splinters mingled with the iron. When wood alone was tried, the splinters were trifling as compared with those from the iron. Other experiments were then carried out to see if these effects could be mitigated, but without success. The deduction was that the destructive effects of shot on iron ships could not be prevented. If the iron sides were of the thickness required to give adequate strength to the ship—as ⅝ or, at least, half-an-inch—the shot was broken up. If the plates were thinner, the ships would be deficient in strength, and though the shot might pass through without breaking up, the disc of iron driven in was broken into numerous small pieces.
These results created a great sensation. A verdict was given that iron vessels, however convenient and advantageous in other respects, were utterly unfit for purposes of war, and a committee of naval and military officers, which had been directed to report how far it might be possible to arm vessels of the packet service in case of war, rejected all constructed of iron. Many years were to elapse before this material was taken into favour again. It was even a question then whether iron steamers were ​fit to be employed as transports for the conveyance of troops and stores during war. However, the Admiralty decided to employ those which were being built as troop ships. In one or two others which were completed the armament was removed from the main deck, and timber substituted for iron in the upper works, behind which a few light guns were placed. Considering the present almost universal adoption of iron and steel for naval architecture, the foregoing events appear to me to have no little interest I have not dwelt upon the defects of the substances employed, such as cast-iron shot, and probably the inferior nature of the plates. No doubt both had an important bearing on the results obtained, but I will pass on to the revival of iron for warship construction. As practically in England this occurred simultaneously with the introduction of armour, I shall deal with them together in reference to the creation of our modern navy. With many inventions it is difficult to assign to any country or individual either actual discovery or practical application. In most cases the two operations are distinct, and separated by a considerable interval of time. This is certainly true as regards both the idea of protecting ships with an external casting of iron and its actual use. The first idea is, I think, due to Colonel Paixhans, the French officer who was mainly instrumental in substituting horizontal shell fire in place of shot. In 1825 he expressed an opinion that line-of-battle ships might be cuirassed against cannon shot by sacrificing a tier of guns, and that seven or eight inches of iron would effect ​it. In this we see a complete foreshadowing of what was to come thirty years later. He recognised at once the revolution his own invention would effect in naval armaments, and that provision must be made against it. Though no sailor or naval architect, he saw that his new idea was incompatible with the lofty sides of the old liner; but still more strangely, considering the date of his opinion, he indicated an amount of protectiou which was not reached for some years after the introduction of armour, as though he had an inkling of the later development of ordnance now so familiar to us.
But this conception of the future battle ship remained unheeded until the Crimean War, when the Emperor Napoleon, who in matters of war material often showed considerable ability, proposed the construction of floating batteries, or ships protected on the exterior by thick plates of iron, and shortly after five such batteries were commenced in France. All were of the same dimensions, 172 ft. long and 44 ft. broad. The side above the water line, which was only a few feet high, had a covering of 4½ in. of iron, a thickness determined after experiments with existing guns and projectiles. Behind the armour was a backing of 17 in. of timber. This added to the protection, besides being useful for supporting the heavy weight of iron with bolts. The first was launched in March 1855, and the others in July. We followed suit with three similar vessels, the 'Thunderbolt,' 'Erebus,' and ’Terror.' They were at first intended for an attack on Cronstadt, but this idea being abandoned, they were sent to the ​Black Sea, and arrived in October 1855. Three of the French batteries had been previously despatched to the same locality, and took part in the bombardment of Kinburn. Our vessels were armed with thirty 60-pounders, the largest piece of ordnance then in use. Having a flat bottom, they only drew 9 ft. of water. They were, in fact, ships from which a thick slice had been removed from their hulls above and below the water. They were well suited, from their light draught, for the shallow waters of the Baltic, and with their powerful armament could have attacked the forts at Cronstadt with advantage, because these were all low down, and not of the formidable nature asserted at the time.
The defence of Kinburn in the Black Sea consisted of a strong casemated fort armed with over sixty guns, and supported by earthworks with a few additional guns. These batteries were on a narrow spit of land at the entrance to the River Boug, about forty miles east of Odessa. A combined English and French force was sent to attack them early in October 1855. It consisted of ships of the line, steamers, gunboats, mortar vessels, and the three French floating batteries lately arrived. On the 17th the assault took place. The mortar boats first opened fire, and then the floating batteries. Curiosity was excited as to the behaviour of the new constructions, and it was soon evident, after the forts commenced returning the fire, that the iron plates afforded efficient protection. The floating batteries were repeatedly struck by shot, which hardly indented the sides, and the shells burst ​harmlessly against them. Damage, of course, they received as, having numerous port holes, all the projectiles and pieces of shell could not be excluded, but the injuries received were small in comparison to what they would have been had the sides been without the armour. To have been completely effectual there should have been at least a dozen of these batteries. The number of guns three could bring into action was relatively small. After a two hours' cannonade the line-of-battle and other ships advanced and poured in a heavy fire. In less than half-an-hour the batteries were silenced, and the appearance of a white flag showed that all resistance was at an end.
The success attending the employment of these floating batteries in the Black Sea indicated that in some such direction was to be found the solution of a problem now exercising men's minds, namely, how to resist the destructive effects of shell. In England we were disposed to rely on what had in former years admirably answered the purpose, and given us a supremacy on the sea by which the security of the country was ensured. Had our fleet suffered defeat, we might have been more ready to adopt new inventions, indeed, to initiate them, rather than wait until their utility was proved by others. But the weapons to hand not having failed, the natural tendency was to let them go with reluctance. In France, on the other hand, no such sentiment prevailed; and the skill she had always shown in naval construction was at once displayed when an entirely new departure for the designs of battle ships was taken. She had, moreover, in the head ​of the naval constructive department at that time, a man of genius and originality. M. Dupuy de Lôme had already given proof of both these qualities, and now he determined to boldly transform a wooden line-of-battle ship into an armour-clad which should be a seaworthy as well as a formidable fighting structure. To this end he took the 'Napoleon,' a fine two-decker, removed the upper portion, lengthened her by 24 ft, and placed 5-in. armour plates on the side, with 26 in. of wood backing. This work was commenced in 1857, but not completed till the autumn of 1859. The vessel thus changed was renamed 'La Gloire,' and is now historically famous as the first seagoing ironclad. Her armament was placed along the main deck, as in a frigate. With a length of 235 ft, and breadth of 55 ft, she had a displacement of 5000 tons, and her speed under steam was about 12 knots. Her completion created even more excitement than the appearance of the 'Niagara' but two years previously.
’LA GLOIRE.'
In the meantime we had been watching with curiosity the experiment of our neighbours, unable to recognise that the day had arrived when a new system of naval architecture for war purposes must be adopted. But public opinion was roused, and the Admiralty saw that ​change could not be resisted. Designs were invited from various quarters, but the plan prepared by the Chief Constructor of the Navy, Mr Isaac Watts, in conjunction with the eminent naval architect Mr Scott Russell, was decided upon. This produced the 'Warrior,' ordered in 1859, and completed in 1861. She embodied some remarkable characteristics. In the first place, her hull was of iron, and considering what had taken place ten years previously, the boldness of this step can be appreciated. But as any project of adding iron to the lofty sides of a line-of-battle ship was impracticable, the necessity of limiting the principal armament to one deck was apparent. To compensate for such a reduction, the single deck should carry a number of the most powerful guns then in use, with greater space between them than had usually been accorded, so as to reduce the injury that the entrance of a shell would inflict. Though the sides might be impregnable, the port holes were so many weak points which must not be lost sight of. In 'La Gloire' they were very close together, and hence much of the value of the armour was lost. Such considerations involved a length of ship which previous experience with the 'Mersey' and 'Orlando' had shown to be impossible in vessels built of wood and carrying powerful machinery. Another point urged was that iron would be less subject to fire than wood, so the former material was adopted. The result was an iron frigate 382 ft. long at the water-line, which was increased to 420 ft. over all when the old graceful form of bow was added. All former associations could not be given up ​at a swoop, and as the ram was not then considered an important weapon, it only received partial recognition. This was effected by the stem at the water line being made to project slightly in the form of a spur, but the bow added to the upper part hid the ram thus disposed and gave the 'Warrior' the appearance forward of a
THE 'WARRIOR.'
sailing clipper. In the event of ramming, the overhanging portion would be knocked away, and the spur be brought in contact. On the ship's side, for a length of 212 ft, plates of iron 4 1/2 in. thick were secured to teak backing 18 in. thick. This wood is durable, and had other advantages for such service. The side armour left off a little over 80 ft. from bow and stern, as it was not considered desirable to load the ends of the ship with such weights.
THE 'WARRIOR.'
The 'Warrior' was thus given extensive sail power, and to all appearance she was a long, graceful frigate. The transition was thereby rendered more palatable to the old navy, whereas if we had gone at once to those structures irreverently—but not inaptly—termed 'flat-irons,' now so familiar in the later turret ships, the exasperated feelings of the ancient mariners would have been pitiable to contemplate.
The 'Warrior' was built at the Thames Iron Works, and a proof of the excellence of her construction is to be found in the fact that after an interval of thirty years her hull is as sound as the day on which she was launched. That day was a memorable occasion. All the world had been interested in the 'bold experiment,' as Sir John Pakington truly described it on her trial trip. No ship ever had so many visitors from all parts during her construction. In France, though first in the field, they had simply cut down a wooden ship and plated her with iron. It was a great advance on the floating batteries, but in England an entirely new departure had been taken, and in my opinion there is no question as to which was the best fighting ship. I should infinitely have preferred to command the 'Warrior,' taking into consideration her higher speed and greater dispersion of armament. The gun ports were 15 ft apart, in 'La Gloire' they were ​much closer. Hence shell entering the battery of the latter would have taken much greater effect.
It is not my intention to detail at length the changes made in successive designs after the 'Warrior.' Already rifled ordnance was imposing a fresh advance, and the struggle between guns and armour had begun. The 'Warrior' had one sister, the 'Black Prince'; and that the second-class battle ship, corresponding to the two-decker, should be represented under the new order, two smaller armour-clads, the 'Defence' and 'Resistance,' were begun. The disposition of their armour was similar to that of the 'Warrior,' but they were only 280 ft. long, and the displacement 6150 tons. The 'Hector' and ’Valiant' were two other ships of the same type, with slight modifications. In the next designs it was determined to remedy the defect already alluded to, namely, the unprotected ends. This was first done in the 'Achilles.' Her length was the same as that of the 'Warrior,' but she was 600 tons larger, to allow of the armour being carried completely to the ends. This ship may be considered the first example of the armoured belt, with gun battery in the centre, though this battery before long became even more contracted.
THE 'AGINCOURT.'
​The ideas of Mr Reed in reference to construction were adopted, and in one respect it could not be otherwise. The size and power of guns were being increased to overcome the resistance of armour, and this necessitated a smaller number, unless ships were to be much larger. At this time, however, a displacement of 10,000 tons was considered an outside limit. The 'Bellerophon,' begun in 1863, was the first vessel under the new régime.
THE 'BELLEROPHON.
With a length of 300 ft, and a displacement of 7500 tons, she carried a 6-in. belt of armour, which in the centre was carried up to form a central battery to contain ten guns, each weighing 12 tons. Two more guns were placed forward to give bow fire.
It was soon seen that a further advance must be made to meet the growing power of the gun. This led to the design of the 'Hercules,' in which the displacement was increased to 8700 tons, the armoured belt to
THE 'HERCULES.'
9 in., and the principal armament to 18-ton guns. To add to the fire right ahead and astern the ends of the ​battery at the sides were recessed. This enabled two of the battery guns to point ahead and two astern. The length of the ship did not exceed 325 ft.
From this brief description it is evident how rapid had been the advance in most of the fighting elements of the new warship. Speed alone had not increased, but this had been maintained with a shorter and handier ship. The great length of the 'Warrior' and 'Minotaur' was inconvenient, to say the least of it, owing to the space they required to turn in. The 'Hercules' was universally recognised as a splendid specimen of construction, and remains to this day a great favourite with naval officers. She was, however, eclipsed by the 'Alexandra,' launched a few years after—the last representative of the broadside system. Her length was the same as that of the 'Hercules,' but the displacement was increased to 9500 tons, by which she was enabled to carry armour 12 in. thick at the water line opposite the machinery, and tapering to 6 in. at the bow and stern. The importance of protecting the motive power more completely than other portions of the hull had for some time been recognised, and, moreover, the extremities would be overburdened with such heavy weights as 12-in. plates. The disposition of the armament differed somewhat from that of the 'Hercules.' There was the same central battery, containing ten 18-ton guns, but above this was another battery, in which was placed two 25-ton guns. Both batteries had recessed ports, by which a powerful bow fire was obtained. It may be observed here that the ​mounting and working of such heavy guns on the broadside was only possible from their comparative shortness, so that when required they could be withdrawn or housed inside the ship. Guns of the present day, and of the same diameter of bore, are twice the length. We had already adopted the twin screw, and the 'Alexandra' was so fitted. This, added to improved machinery, gave her a speed of 15 knots. The climax in broadside ironclads had now been reached. Few were found to dispute the merits of our latest production as an engine of war. Though never yet opposed to a hostile vessel, the 'Alexandra' took part in the bombardment of the Egyptian forts at Alexandria in 1882, and rendered good service on that occasion. She was struck about thirty times, but sustained no serious injury.
THE BATTERIES OF THE 'ALEXANDRA.'
While we, in common with other nations, were thus encasing our ships in coats of mail, the advantage conferred by this system was to my mind strikingly illustrated by an episode in the American Civil War. After a cruise of two years the celebrated 'Alabama' put into Cherbourg to be docked and repaired. Her commander, Captain Semmes, in his interesting account of her career, says of this period: 'The poor old "Alabama" was not now what she had been. She was like the wearied foxhound limping back after a long chase, footsore, and longing for quiet and repose. Her commander, like herself, was well-nigh worn down.' Three days after her arrival the United States sloop 'Kearsage' turned up off the port, and Semmes sent a message to her commander that if he would wait until the 'Alabama' had completed with coal he would come out to meet him. The two vessels were not unequally matched in dimensions and armament. The 'Kearsage,' Captain Winslow, was a ​wooden sloop of 1030 tons. She carried two 11-in. smooth bore guns, four 32-pounders, and one rifled 30-pounder. Her crew numbered 160. The 'Alabama' was also a wooden vessel of 1040 tons. Her armament consisted of one 8-in. smooth bore, one 7-in. rifled gun, and six 32-pounders. She carried 150 men. Beyond stowing away her top hamper and making the preparations for action common to rigged vessels she took no special precautions. The 'Kearsage,' on the other hand, had suspended her spare chain cables up and down the side, opposite the boilers and machinery, thus giving armour protection to that important locality and a large portion of the hull at the water line. The chain was covered over with a thin casing of wood, which effectually concealed what was beneath. This method of adding to the defence of wooden ships had been first adopted by Admiral Farragut when passing hostile forts in the Mississippi the same year. As against the guns and projectiles of that time, and especially as a preventive to the penetration of shells, by causing them to burst outside, the plan was ingenious and effectual. The same procedure was open to Captain Semmes, but for some reason he did not adopt it, nor does he appear to have been aware of this move of his opponent. Though Semmes afterwards sneered at an enemy 'who went out chivalrously armoured to encounter a ship whose wooden sides were entirely without protection,' such utilisation of the resources of a ship to improve her defensive capability was not only perfectly justifiable but the plain duty of a commander desirous of ensuring the ​victory with as little injury as possible to his own vessel.