136-549: The Holman Projector was an anti-aircraft weapon used by the Royal Navy during World War II , primarily between early 1940 and late 1941. The weapon was proposed and designed by Holmans , a machine tool manufacturer based at Camborne, Cornwall . A number of models were produced during the war years, but all worked on the principle of a pneumatic mortar , using compressed air or high pressure steam to fire an explosive projectile at enemy aircraft. Intended primarily as
272-659: A destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet , convoy , or carrier battle group and defend them against a wide range of general threats. They were originally conceived in 1885 by Fernando Villaamil for the Spanish Navy as a defense against torpedo boats , and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although
408-635: A self-propelled torpedoes in the Battle of Caldera Bay in 1891, thus surpassing its main function of hunting torpedo boats. Fernando Villaamil , second officer of the Ministry of the Navy of Spain , designed his own torpedo gunboat to combat the threat from the torpedo boat. He asked several British shipyards to submit proposals capable of fulfilling these specifications. In 1885, the Spanish Navy chose
544-600: A 75 mm 12-pounder, and even a 105 mm gun. Erhardt also had a 12-pounder, while Vickers Maxim offered a 3-pounder and Schneider a 47 mm. The French balloon gun appeared in 1910, it was an 11-pounder but mounted on a vehicle, with a total uncrewed weight of two tons. However, since balloons were slow moving, sights were simple. But the challenges of faster moving aeroplanes were recognised. By 1913 only France and Germany had developed field guns suitable for engaging balloons and aircraft and addressed issues of military organisation. Britain's Royal Navy would soon introduce
680-582: A crew of 60. In terms of gunnery, speed, and dimensions, the specialised design to chase torpedo boats and her high-seas capabilities, Destructor was an important precursor to the TBD. The first classes of ships to bear the formal designation TBD were the Daring class of two ships and Havock class of two ships of the Royal Navy. Early torpedo gunboat designs lacked the range and speed to keep up with
816-644: A destroyer was the German U-19 , rammed by HMS Badger on 29 October 1914. While U-19 was only damaged, the next month, HMS Garry successfully sank U-18 . The first depth-charge sinking was on 4 December 1916, when UC-19 was sunk by HMS Llewellyn . The submarine threat meant that many destroyers spent their time on antisubmarine patrol. Once Germany adopted unrestricted submarine warfare in January 1917, destroyers were called on to escort merchant convoys . US Navy destroyers were among
952-461: A displacement of 9,200 tons, and with an armament of more than 90 missiles, guided-missile destroyers such as the Arleigh Burke class are actually larger and more heavily armed than most previous ships classified as guided-missile cruisers. The Chinese Type 055 destroyer has been described as a cruiser in some US Navy reports due to its size and armament. Many NATO navies, such as
1088-530: A doubt magnificent fighting vessels... but unable to stand bad weather". During the Russo-Japanese War in 1904, the commander of the Imperial Japanese Navy TBD Akatsuki described "being in command of a destroyer for a long period, especially in wartime... is not very good for the health". Stating that he had originally been strong and healthy, he continued, "life on a destroyer in winter, with bad food, no comforts, would sap
1224-464: A dozen or so aircraft were confirmed to have been downed by the weapon in its first year of service but it succeeded in convincing many more aircraft that the target vessel was more heavily equipped with more effective weapons, confirmed by the large number of reports were made about Luftwaffe aircraft turning away from an attack after salvos from ship-mounted Holman Projectors. Within the Admiralty ,
1360-645: A full military structure. For example, the UK's Anti-Aircraft Command, commanded by a full British Army general was part of ADGB. At its peak in 1941–42 it comprised three AA corps with 12 AA divisions between them. The use of balloons by the U.S. Army during the American Civil War compelled the Confederates to develop methods of combating them. These included the use of artillery, small arms, and saboteurs. They were unsuccessful, and internal politics led
1496-460: A further one thousand units, to be fitted to coastal gunboats and other light craft, where the light recoil of the weapon had proven useful. Morris Oram, from Camborne, lead the development and was later presented by W. Churchill with a commemorative picture after successful trials of the Mk III at Portsmouth. He worked for over 50 years at Holman Brothers. Plans were drawn up for a Mk IV version of
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#17327768821551632-535: A further three similar classes were produced around 1930. The Le Fantasque class of 1935 carried five 138 millimetres (5.4 in) guns and nine torpedo tubes, but could achieve speeds of 45 knots (83 km/h), which remains the record speed for a steamship and for any destroyer. The Italians' own destroyers were almost as swift; most Italian designs of the 1930s were rated at over 38 knots (70 km/h), while carrying torpedoes and either four or six 120 mm guns. Germany started to build destroyers again during
1768-475: A large number in quick succession gave the impression to incoming Luftwaffe pilots that the target vessel was armed with something far more deadly than the Holman Projector, deterring or disrupting attacks, or convincing the aircraft's crew an attack at greater range would be prudent, with a commensurate decrease in accuracy. The Mk II Projector was developed after a request from the Royal Navy for
1904-451: A large traverse that could be easily transported on a wagon. Krupp 75 mm guns were supplied with an optical sighting system that improved their capabilities. The German Army also adapted a revolving cannon that came to be known to Allied fliers as the " flaming onion " from the shells in flight. This gun had five barrels that quickly launched a series of 37 mm artillery shells. As aircraft started to be used against ground targets on
2040-543: A maritime force against attacks by airborne weapons launched from aircraft, ships, submarines and land-based sites". In some armies the term all-arms air defence (AAAD) is used for air defence by nonspecialist troops. Other terms from the late 20th century include "ground based air defence" (GBAD) with related terms " short range air defense " (SHORAD) and man-portable air-defense system (MANPADS). Anti-aircraft missiles are variously called surface-to-air missiles , ("SAMs") and surface-to-air guided weapons (SAGWs). Examples are
2176-557: A maximum height during trials of around 600 feet (180 m). The rate of fire could reach thirty rounds per minute in the hands of an experienced crew. More appealing yet to the armed forces was the fact that the weapon could be produced using only cast iron and mild steel , both of which were in fairly ready supply at this stage of the war. An official trial of the Mk I Projector took place in February 1940 with resounding success. An order
2312-446: A maximum speed of 22.6 knots (41.9 km/h), which made her one of the faster ships in the world in 1888. She was armed with one 90 mm (3.5 in) Spanish-designed Hontoria breech-loading gun, four 57 mm (2.2 in) ( 6-pounder ) Nordenfelt guns, two 37 mm (1.5 in) (3-pdr) Hotchkiss cannons and two 15-inch (38 cm) Schwartzkopff torpedo tubes. The ship carried three torpedoes per tube. She carried
2448-454: A new 3.6-inch gun, in 1918. In 1928 a 3.7-inch (94 mm) gun became the preferred solution, but it took six years to gain funding. Production of the QF 3.7-inch gun began in 1937; this gun was used on mobile carriages with the field army and transportable guns on fixed mountings for static positions. At the same time the Royal Navy adopted a new 4.5-inch (113 mm) gun in a twin turret, which
2584-637: A new field mounting was introduced in 1916. Since most attacks were at night, searchlights were soon used, and acoustic methods of detection and locating were developed. By December 1916 there were 183 AA sections defending Britain (most with the 3-inch), 74 with the BEF in France and 10 in the Middle East. AA gunnery was a difficult business. The problem was of successfully aiming a shell to burst close to its target's future position, with various factors affecting
2720-691: A par with the army, navy, or air force. In the Soviet Union, this was called Voyska PVO , and had both fighter aircraft, separate from the air force, and ground-based systems. This was divided into two arms, PVO Strany, the Strategic Air defence Service responsible for Air Defence of the Homeland, created in 1941 and becoming an independent service in 1954, and PVO SV, Air Defence of the Ground Forces. Subsequently, these became part of
2856-633: A single hit. In most cases torpedo and/or dual-purpose gun armament was reduced to accommodate new anti-air and anti-submarine weapons. By this time the destroyers had become large, multi-purpose vessels, expensive targets in their own right. As a result, casualties on destroyers were among the highest. In the US Navy, particularly in World War II, destroyers became known as tin cans due to their light armor compared to battleships and cruisers. The need for large numbers of antisubmarine ships led to
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#17327768821552992-408: A skeleton, and my bones are full of rheumatism ." In 1898, the US Navy officially classified USS Porter , a 175-foot (53 m) long all steel vessel displacing 165 tons, as a torpedo boat, but her commander, LT. John C. Fremont, described her as "...a compact mass of machinery not meant to keep the sea nor to live in... as five-sevenths of the ship are taken up by machinery and fuel, whilst
3128-419: A stop-gap defensive weapon for British merchant ships, which had been suffering heavy losses from Luftwaffe aircraft flying anti-shipping missions, the low altitude at which such strikes often took place (such as during torpedo attacks by Heinkel He 111s or skip-bombing attacks by Focke-Wulf Fw 200 Condor ) meant that a weapon of such limited range and velocity could throw up an effective screen of fire over
3264-431: A threat to large capital ships near enemy coasts. The first seagoing vessel designed to launch the self-propelled Whitehead torpedo was the 33-ton HMS Lightning in 1876. She was armed with two drop collars to launch these weapons; these were replaced in 1879 by a single torpedo tube in the bow. By the 1880s, the type had evolved into small ships of 50–100 tons, fast enough to evade enemy picket boats. At first,
3400-404: A turtleback (i.e. rounded) forecastle that was characteristic of early British TBDs. HMS Daring and HMS Decoy were both built by Thornycroft , displaced 260 tons (287.8 tons full load), and were 185 feet in length. They were armed with one 12-pounder gun and three 6-pounder guns, with one fixed 18-in torpedo tube in the bow plus two more torpedo tubes on a revolving mount abaft
3536-411: A version that could be fired using steam in place of compressed air, since the steam-engined trawlers (both fishing and minesweeping) had the former in plentiful supply. The Stokes design of the Mk I needed to be abandoned for this, since the harsh weather experienced by the trawlers invariably rusted the valves of the pneumatics. When steam was used in such a system, the water would condense in
3672-453: A vessel, even if only to create a distracting or deterrent effect, obliging the enemy to bomb from greater heights which reduced bombing accuracy. While ineffective against normal bombing attacks from higher altitudes, the weapon was far cheaper, easier to build and install in great numbers than conventional anti-aircraft artillery. Holmans specialised in producing gas compressors and pneumatic equipment and its owner, Treve Holman, conceived
3808-572: A way that his firm could aid in the war effort beyond the production of tools. Recalling the World War I -era Stokes Mortar and its successor, the Ordnance ML 3 inch Mortar , Holman believed that it would be possible to produce a version powered by compressed air. Preliminary tests showed that the idea was feasible, with an early prototype throwing an eighteen-pound steel weight nearly 100 yards (91 m). The design eventually settled on for
3944-530: Is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight. Most modern anti-aircraft (AA) weapons systems are optimized for short-, medium-, or long-range air defence, although some systems may incorporate multiple weapons (such as both autocannons and surface-to-air missiles ). ‘Layered air defence’ usually refers to multiple ‘tiers’ of air defence systems which, when combined, an airborne threat must penetrate in order to reach its target; This defence
4080-483: Is assisted but not governed by identification friend or foe (IFF) electronic devices originally introduced during the Second World War . While these rules originate at the highest authority, different rules can apply to different types of air defence covering the same area at the same time. AAAD usually operates under the tightest rules. NATO calls these rules "weapon control orders" (WCO), they are: Until
4216-639: Is deployed in several ways: Air defence has included other elements, although after the Second World War most fell into disuse: Passive air defence is defined by NATO as "Passive measures taken for the physical defence and protection of personnel, essential installations and equipment in order to minimise the effectiveness of air and/or missile attack". It remains a vital activity by ground forces and includes camouflage and concealment to avoid detection by reconnaissance and attacking aircraft. Measures such as camouflaging important buildings were common in
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4352-454: Is operated by specialists, batteries may have several dozen teams deploying separately in small sections; self-propelled air defence guns may deploy in pairs. Batteries are usually grouped into battalions or equivalent. In the field army, a light gun or SHORAD battalion is often assigned to a manoeuvre division. Heavier guns and long-range missiles may be in air-defence brigades and come under corps or higher command. Homeland air defence may have
4488-414: Is to detect hostile aircraft and destroy them. The critical issue is to hit a target moving in three-dimensional space; an attack must not only match these three coordinates, but must do so at the time the target is at that position. This means that projectiles either have to be guided to hit the target, or aimed at the predicted position of the target at the time the projectile reaches it, taking into account
4624-586: Is usually accomplished via the combined use of systems optimized for either short-, medium-, or long-range air defence. In some countries, such as Britain and Germany during the Second World War , the Soviet Union , and modern NATO and the United States, ground-based air defence and air defence aircraft have been under integrated command and control. However, while overall air defence may be for homeland defence (including military facilities), forces in
4760-584: The Dryad class – all built for the Royal Navy during the 1880s and the 1890s. In the 1880s, the Chilean Navy ordered the construction of two Almirante Lynch class torpedo gunboats from the British shipyard Laird Brothers, which specialized in the construction of this type of vessel. The novelty is that one of these Almirante Lynch -class torpedo boats managed to sink the ironclad Blanco Encalada with
4896-470: The Durandal -class torpilleur d'escadre . The United States commissioned its first TBD, USS Bainbridge , Destroyer No. 1, in 1902, and by 1906, 16 destroyers were in service with the US Navy. Torpedo boat destroyer designs continued to evolve around the turn of the 20th century in several key ways. The first was the introduction of the steam turbine . The spectacular unauthorized demonstration of
5032-425: The 13-pr QF 9 cwt and these proved much more satisfactory. However, in general, these ad hoc solutions proved largely useless. With little experience in the role, no means of measuring target, range, height or speed the difficulty of observing their shell bursts relative to the target gunners proved unable to get their fuse setting correct and most rounds burst well below their targets. The exception to this rule
5168-476: The Battle of Jutland , which involved pitched small-boat actions between the main fleets, and several foolhardy attacks by unsupported destroyers on capital ships. Jutland also concluded with a messy night action between the German High Seas Fleet and part of the British destroyer screen. The threat evolved by World War I with the development of the submarine , or U-boat . The submarine had
5304-508: The French , Spanish , Dutch , Danish , and German , use the term " frigate " for their destroyers, which leads to some confusion. The emergence and development of the destroyer was related to the invention of the self-propelled torpedo in the 1860s. A navy now had the potential to destroy a superior enemy battle fleet using steam launches to fire torpedoes. Cheap, fast boats armed with torpedoes called torpedo boats were built and became
5440-458: The Mk I featured a 4½ foot unrifled steel barrel. Rounds were dropped down the barrel from the muzzle and the pneumatic system triggered instantly upon the round striking the base. The rounds themselves were made from an open-topped metal container, holding a Mills bomb fitted with a 3.5 second fuse . High-pressure air bottles were able to supply enough power to fire fifty rounds each, with
5576-408: The QF 3-inch and QF 4-inch AA guns and also had Vickers 1-pounder quick firing "pom-poms" that could be used in various mountings. The first US anti-aircraft cannon was a 1-pounder concept design by Admiral Twining in 1911 to meet the perceived threat of airships, that eventually was used as the basis for the US Navy's first operational anti-aircraft cannon: the 3-inch/23 caliber gun . On
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5712-671: The RIM-66 Standard , Raytheon Standard Missile 6 , or the MBDA Aster missile. Non-English terms for air defence include the German Flak or FlaK ( Fliegerabwehrkanone , 'aircraft defence cannon', also cited as Flugabwehrkanone ), whence English flak , and the Russian term Protivovozdushnaya oborona ( Cyrillic : Противовозду́шная оборо́на), a literal translation of 'anti-air defence', abbreviated as PVO. In Russian,
5848-675: The Royal Naval Volunteer Reserve (RNVR) was manning AA guns and searchlights assembled from various sources at some nine ports. The Royal Garrison Artillery (RGA) was given responsibility for AA defence in the field, using motorised two-gun sections. The first were formally formed in November 1914. Initially they used QF 1-pounder "pom-pom"s (37 mm versions of the Maxim Gun ). All armies soon deployed AA guns often based on their smaller field pieces, notably
5984-682: The United States Air Force 's operating bases in the UK. All ground-based air defence was removed from Royal Air Force (RAF) jurisdiction in 2004 . The British Army's Anti-Aircraft Command was disbanded in March 1955, but during the 1960s and 1970s the RAF's Fighter Command operated long-range air-defence missiles to protect key areas in the UK. During World War II, the Royal Marines also provided air defence units; formally part of
6120-573: The 1930s as part of Hitler's rearmament program. The Germans were also fond of large destroyers, but while the initial Type 1934 displaced over 3,000 tons, their armament was equal to smaller vessels. This changed from the Type 1936 onwards, which mounted heavy 150 millimetres (5.9 in) guns. German destroyers also used innovative high-pressure steam machinery; while this should have helped their efficiency, it more often resulted in mechanical problems. Once German and Japanese rearmament became clear,
6256-649: The 1950s, guns firing ballistic munitions were the standard weapon; guided missiles then became dominant, except at the very shortest ranges. However, the type of shell or warhead and its fuzing and, with missiles, the guidance arrangement were and are varied. Targets are not always easy to destroy; nonetheless, damaged aircraft may be forced to abort their mission and, even if they manage to return and land in friendly territory, may be out of action for days or permanently. Ignoring small arms and smaller machine-guns, ground-based air defence guns have varied in calibre from 20 mm to at least 152 mm. Ground-based air defence
6392-471: The 30th of September, 1915, troops of the Serbian Army observed three enemy aircraft approaching Kragujevac . Soldiers fired at them with shotguns and machine-guns but failed to prevent them from dropping 45 bombs over the city, hitting military installations, the railway station and many other, mostly civilian, targets in the city. During the bombing raid, private Radoje Ljutovac fired his cannon at
6528-420: The 8.8 cm FlaK 18 in 1933, the 36 and 37 models followed with various improvements, but ballistic performance was unchanged. In the late 1930s the 10.5 cm FlaK 38 appeared, soon followed by the 39; this was designed primarily for static sites but had a mobile mounting, and the unit had 220 V 24 kW generators. In 1938 design started on the 12.8 cm FlaK . Britain had successfully tested
6664-487: The AA systems are called zenitnye (i.e., 'pointing to zenith ') systems. In French, air defence is called Défense contre les aéronefs (DCA) , aéronef meaning 'aircraft'. The maximum distance at which a gun or missile can engage an aircraft is an important figure. However, many different definitions are used and unless the same definition is used, performance of different guns or missiles cannot be compared. For AA guns only
6800-492: The British Isles increased in 1915 and the AA efforts were deemed somewhat ineffective, so a Royal Navy gunnery expert, Admiral Sir Percy Scott , was appointed to make improvements, particularly an integrated AA defence for London. The air defences were expanded with more RNVR AA guns, 75 mm and 3-inch, the pom-poms being ineffective. The naval 3-inch was also adopted by the army, the QF 3-inch 20 cwt (76 mm),
6936-491: The British adopted a new instrument developed by Vickers. It was a mechanical analogue computer - the Predictor AA No 1. Given the target height, its operators tracked the target and the predictor produced bearing, quadrant elevation and fuse setting. These were passed electrically to the guns, where they were displayed on repeater dials to the layers who "matched pointers" (target data and the gun's actual data) to lay
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#17327768821557072-538: The British and American navies consciously focused on building destroyers that were smaller, but more numerous than those used by other nations. The British built a series of destroyers (the A class to I class ), which were about 1,400 tons standard displacement, and had four 4.7-inch (119 mm) guns and eight torpedo tubes; the American Benson class of 1938 was similar in size, but carried five 5-inch (127 mm) guns and ten torpedo tubes. Realizing
7208-472: The French 75 mm and Russian 76.2 mm, typically simply propped up on some sort of embankment to get the muzzle pointed skyward. The British Army adopted the 13-pounder quickly producing new mountings suitable for AA use, the 13-pdr QF 6 cwt Mk III was issued in 1915. It remained in service throughout the war but 18-pdr guns were lined down to take the 13-pdr shell with a larger cartridge producing
7344-563: The German Flugzeugabwehrkanone ), "ack-ack" (from the spelling alphabet used by the British for voice transmission of "AA"); and "archie" (a World War I British term probably coined by Amyas Borton , and believed to derive via the Royal Flying Corps , from the music-hall comedian George Robey 's line "Archibald, certainly not!" ). NATO defines anti-aircraft warfare (AAW) as "measures taken to defend
7480-689: The Projector to fill this niche more readily, with a shorter barrel and swivel base but when these were ready the war had progressed, more advanced weaponry was available and that made the Projector obsolete. A number of the earlier model Projectors remained in service and discouraged attacks in the Mediterranean by some smaller submarines , and a small number were adapted to fire grapnels for commando cliff assaults. In total around 4,500 Holman Projectors were put into active service during World War II, and several can still be found in museums in
7616-479: The Royal Navy's first Havock class of TBDs, up to the First World War with 300-foot (91 m) long destroyers displacing 1,000 tons was not unusual. Construction remained focused on putting the biggest possible engines into a small hull, though, resulting in a somewhat flimsy construction. Often, hulls were built of high-tensile steel only 1 ⁄ 8 in (3.2 mm) thick. By 1910,
7752-638: The Russian fleet in port, firing a total of 18 torpedoes, but only two Russian battleships, Tsesarevich and Retvizan , and a protected cruiser , Pallada , were seriously damaged due to the proper deployment of torpedo nets . Tsesarevich , the Russian flagship, had her nets deployed, with at least four enemy torpedoes "hung up" in them, and other warships were similarly saved from further damage by their nets. While capital-ship engagements were scarce in World War I, destroyer units engaged almost continually in raiding and patrol actions. The first shot of
7888-402: The Second World War, Polish ( kontrtorpedowiec , now obsolete). Once destroyers became more than just catchers guarding an anchorage, they were recognized to be also ideal to take over the offensive role of torpedo boats themselves, so they were also fitted with torpedo tubes in addition to their antitorpedo-boat guns. At that time, and even into World War I, the only function of destroyers
8024-473: The Second World War. During the Cold War the runways and taxiways of some airfields were painted green. While navies are usually responsible for their own air defence—at least for ships at sea—organisational arrangements for land-based air defence vary between nations and over time. The most extreme case was the Soviet Union and this model may still be followed in some countries: it was a separate service, on
8160-519: The USN with the Paulding class of 1909. In spite of all this variety, destroyers adopted a largely similar pattern. The hull was long and narrow, with a relatively shallow draft. The bow was either raised in a forecastle or covered under a turtleback; underneath this were the crew spaces, extending 1 ⁄ 4 to 1 ⁄ 3 the way along the hull. Aft of the crew spaces was as much engine space as
8296-534: The United Kingdom. While Holman Projector had limited success with one cargo ship's crew shooting down two airplanes, it became better known for its other uses. Since it had a wide barrel, the projector could shoot nearly anything that could fit inside it; the most popular makeshift ammunition was potatoes . Anti-aircraft warfare Anti-aircraft warfare is the counter to aerial warfare and includes "all measures designed to nullify or reduce
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#17327768821558432-621: The United States Army's Balloon Corps to be disbanded mid-war. The Confederates experimented with balloons as well. Turks carried out the first ever anti-airplane operation in history during the Italo-Turkish war . Although lacking anti-aircraft weapons, they were the first to shoot down an airplane by rifle fire. The first aircraft to crash in a war was the one of Lieutenant Piero Manzini, shot down on August 25, 1912. The earliest known use of weapons specifically made for
8568-669: The air force and ground forces respectively. At the other extreme, the United States Army has an Air Defense Artillery Branch that provides ground-based air defence for both homeland and the army in the field; however, it is operationally under the Joint Force Air Component Commander . Many other nations also deploy an air-defence branch in the army. Some, such as Japan or Israel, choose to integrate their ground based air defence systems into their air force. In Britain and some other armies,
8704-413: The altitude at which a gun could deliver a series of shells against a moving target; this could be constrained by maximum fuse running time as well as the gun's capability. By the late 1930s the British definition was "that height at which a directly approaching target at 400 mph [640 km/h] can be engaged for 20 seconds before the gun reaches 70 degrees elevation". The essence of air defence
8840-562: The anti-aircraft role occurred during the Franco-Prussian War of 1870. After the disaster at Sedan , Paris was besieged and French troops outside the city started an attempt at communication via balloon . Gustav Krupp mounted a modified 1-pounder (37 mm) gun – the Ballonabwehrkanone (Balloon defence cannon) or BaK — on top of a horse-drawn carriage for the purpose of shooting down these balloons. By
8976-439: The army adopted in simplified single-gun mountings for static positions, mostly around ports where naval ammunition was available. The performance of the new guns was limited by their standard fuse No 199, with a 30-second running time, although a new mechanical time fuse giving 43 seconds was nearing readiness. In 1939 a machine fuse setter was introduced to eliminate manual fuse setting. Destroyer In naval terminology,
9112-407: The ascending part of the trajectory can be usefully used. One term is "ceiling", the maximum ceiling being the height a projectile would reach if fired vertically, not practically useful in itself as few AA guns are able to fire vertically, and the maximum fuse duration may be too short, but potentially useful as a standard to compare different weapons. The British adopted "effective ceiling", meaning
9248-581: The battle fleet, and as they inherently became larger, they became officially designated "torpedo-boat destroyers", and by the First World War were largely known as "destroyers" in English. The antitorpedo boat origin of this type of ship is retained in its name in other languages, including French ( contre-torpilleur ), Italian ( cacciatorpediniere ), Portuguese ( contratorpedeiro ), Czech ( torpédoborec ), Greek ( antitorpiliko , αντιτορπιλικό ), Dutch ( torpedobootjager ) and, up until
9384-457: The battlefield, the AA guns could not be traversed quickly enough at close targets and, being relatively few, were not always in the right place (and were often unpopular with other troops), so changed positions frequently. Soon the forces were adding various machine-gun based weapons mounted on poles. These short-range weapons proved more deadly, and the " Red Baron " is believed to have been shot down by an anti-aircraft Vickers machine gun . When
9520-449: The class gave the guns high-angle turrets for antiaircraft warfare, and the 24-inch (61 cm), oxygen-fueled Long Lance Type 93 torpedo . The later Hatsuharu class of 1931 further improved the torpedo armament by storing its reload torpedoes close at hand in the superstructure, allowing reloading within 15 minutes. Most other nations replied with similar larger ships. The US Porter class adopted twin 5-inch (127 mm) guns, and
9656-408: The competition for a share of limited defence budgets. Demobilisation meant that most AA guns were taken out of service, leaving only the most modern. However, there were lessons to be learned. In particular the British, who had had AA guns in most theatres in action in daylight and used them against night attacks at home. Furthermore, they had also formed an Anti-Aircraft Experimental Section during
9792-470: The design submitted by the shipyard of James and George Thomson of Clydebank . Destructor ( Destroyer in Spanish) was laid down at the end of the year, launched in 1886, and commissioned in 1887. Some authors considered her as the first destroyer ever built. She displaced 348 tons, and was the first warship equipped with twin triple-expansion engines generating 3,784 ihp (2,822 kW), for
9928-442: The destroyer". The German aviso Greif , launched in 1886, was designed as a " Torpedojäger " (torpedo hunter), intended to screen the fleet against attacks by torpedo boats. The ship was significantly larger than torpedo boats of the period, displacing some 2,266 t (2,230 long tons), with an armament of 10.5 cm (4.1 in) guns and 3.7 cm (1.5 in) Hotchkiss revolver cannon . The first vessel designed for
10064-678: The early 20th century balloon, or airship, guns, for land and naval use were attracting attention. Various types of ammunition were proposed, high explosive, incendiary, bullet-chains, rod bullets and shrapnel. The need for some form of tracer or smoke trail was articulated. Fuzing options were also examined, both impact and time types. Mountings were generally pedestal type but could be on field platforms. Trials were underway in most countries in Europe but only Krupp, Erhardt, Vickers Maxim, and Schneider had published any information by 1910. Krupp's designs included adaptations of their 65 mm 9-pounder,
10200-439: The effectiveness of hostile air action". It encompasses surface-based, subsurface ( submarine-launched ), and air-based weapon systems, in addition to associated sensor systems, command and control arrangements, and passive measures (e.g. barrage balloons ). It may be used to protect naval , ground , and air forces in any location. However, for most countries, the main effort has tended to be homeland defence . Missile defence
10336-490: The enemy aircraft and successfully shot one down. It crashed in the city and both pilots died from their injuries. The cannon Ljutovac used was not designed as an anti-aircraft gun; it was a slightly modified Turkish cannon captured during the First Balkan War in 1912. This was the first occasion in military history that a military aircraft was shot down with ground-to-air artillery fire. The British recognised
10472-462: The explicit purpose of hunting and destroying torpedo boats was the torpedo gunboat . Essentially very small cruisers, torpedo gunboats were equipped with torpedo tubes and an adequate gun armament, intended for hunting down smaller enemy boats. By the end of the 1890s, torpedo gunboats were made obsolete by their more successful contemporaries, the TBDs, which were much faster. The first example of this
10608-654: The field, wherever they are, provide their own defences against airborne threats. Until the 1950s, guns firing ballistic munitions ranging from 7.62 mm (.30 in) to 152.4 mm (6 in) were the standard weapons; guided missiles then became dominant, except at the very shortest ranges (as with close-in weapon systems , which typically use rotary autocannons or, in very modern systems, surface-to-air adaptations of short-range air-to-air missiles , often combined in one system with rotary cannons). It may also be called counter-air , anti-air , AA , flak , layered air defence or air defence forces . The term air defence
10744-664: The first American units to be dispatched upon the American entry to the war, and a squadron of Japanese destroyers even joined Allied patrols in the Mediterranean. Patrol duty was far from safe; of the 67 British destroyers lost in the war, collisions accounted for 18, while 12 were wrecked. At the end of the war, the state-of-the-art was represented by the British W class . The trend during World War I had been towards larger destroyers with heavier armaments. A number of opportunities to fire at capital ships had been missed during
10880-720: The fleet they were supposed to protect. In 1892, the Third Sea Lord , Rear Admiral John "Jacky" Fisher ordered the development of a new type of ships equipped with the then-novel water-tube boilers and quick-firing small-calibre guns. Six ships to the specifications circulated by the admiralty were ordered initially, comprising three different designs each produced by a different shipbuilder: HMS Daring and HMS Decoy from John I. Thornycroft & Company , HMS Havock and HMS Hornet from Yarrows , and HMS Ferret and HMS Lynx from Laird, Son & Company . These ships all featured
11016-549: The greatest firepower of all destroyers in the world throughout the first half of the 1920s. This was largely because, between their commissioning in 1920 and 1926, they retained the armament that they had while serving in the Italian Navy as scout cruisers ( esploratori ). When initially ordered by Romania in 1913, the Romanian specifications envisioned three 120 mm guns, a caliber which would eventually be adopted as
11152-584: The ground-based air defence of the British Army's Anti-Aircraft Command , although field-deployed air defence relied on less sophisticated arrangements. NATO later called these arrangements an "air defence ground environment", defined as "the network of ground radar sites and command and control centres within a specific theatre of operations which are used for the tactical control of air defence operations". Rules of engagement are critical to prevent air defences engaging friendly or neutral aircraft. Their use
11288-587: The guns. This system of repeater electrical dials built on the arrangements introduced by British coast artillery in the 1880s, and coast artillery was the background of many AA officers. Similar systems were adopted in other countries and for example the later Sperry M3A3 in the US, was also used by Britain as the Predictor AA No 2. Height finders were also increasing in size; in Britain, the seven-foot optical base World War I Barr & Stroud UB 2 stereoscopic rangefinder
11424-467: The introduction of smaller and cheaper specialized antisubmarine warships called corvettes and frigates by the Royal Navy and destroyer escorts by the USN. A similar programme was belatedly started by the Japanese (see Matsu -class destroyer). These ships had the size and displacement of the original TBDs from which the contemporary destroyer had evolved. Some conventional destroyers completed in
11560-501: The late 1930s for development work on sound-locating acoustic devices to be generally halted, although equipment was retained. Furthermore, in Britain the volunteer Observer Corps formed in 1925 provided a network of observation posts to report hostile aircraft flying over Britain. Initially radar was used for airspace surveillance to detect approaching hostile aircraft. However, the German Würzburg radar put into use in 1940
11696-668: The late 1940s and 1950s were built on wartime experience. These vessels were significantly larger than wartime ships and had fully automatic main guns, unit machinery, radar, sonar, and antisubmarine weapons, such as the squid mortar . Examples include the British Daring -class , US Forrest Sherman -class , and the Soviet Kotlin -class destroyers. Some World War II–vintage ships were modernized for antisubmarine warfare, and to extend their service lives, to avoid having to build (expensive) brand-new ships. Examples include
11832-513: The mobile naval base defence organisation, they were handled as an integral part of the army-commanded ground based air defences. The basic air defence unit is typically a battery with 2 to 12 guns or missile launchers and fire control elements. These batteries, particularly with guns, usually deploy in a small area, although batteries may be split; this is usual for some missile systems. SHORAD missile batteries often deploy across an area with individual launchers several kilometres apart. When MANPADS
11968-494: The need for anti-aircraft capability a few weeks before World War I broke out; on 8 July 1914, the New York Times reported that the British government had decided to "dot the coasts of the British Isles with a series of towers, each armed with two quick-firing guns of special design," while "a complete circle of towers" was to be built around "naval installations" and "at other especially vulnerable points". By December 1914
12104-602: The need for heavier gun armament, the British built the Tribal class of 1936 (sometimes called Afridi after one of two lead ships). These ships displaced 1,850 tons and were armed with eight 4.7-inch (119 mm) guns in four twin turrets and four torpedo tubes. These were followed by the J-class and L-class destroyers, with six 4.7-inch (119 mm) guns in twin turrets and eight torpedo tubes. Antisubmarine sensors included sonar (or ASDIC), although training in their use
12240-574: The perception was that the Projector was a useful stop-gap weapon in the early years of the war, when other more effective anti aircraft weaponry, such as the Oerlikon 20 mm cannon , were in short supply. In 1941, production of the Mk III Holman Projector began. This version was semi-automatic, and capable of firing multiple projectiles in a single salvo to a height of around 1,000 feet (300 m). The Admiralty placed an order for
12376-559: The pipes and prevent firing of the weapon. To solve this, a firing trigger was added, in place of the Stokes design in which the round would be fired automatically. The new version was fitted to a wide variety of ships, from destroyers to minesweepers and motor gun boats : to demonstrate the weapon's versatility, a trial was arranged in Aldershot, Hampshire before Prime Minister Winston Churchill . No Mills rounds were brought, as it
12512-565: The potential to hide from gunfire and close underwater to fire torpedoes. Early-war destroyers had the speed and armament to intercept submarines before they submerged, either by gunfire or by ramming. Destroyers also had a shallow enough draft that they were difficult to hit with torpedoes. The desire to attack submarines under water led to rapid destroyer evolution during the war. They were quickly equipped with strengthened bows for ramming, and depth charges and hydrophones for identifying submarine targets. The first submarine casualty credited to
12648-500: The powers of the strongest men in the long run. A destroyer is always more uncomfortable than the others, and rain, snow, and sea-water combine to make them damp; in fact, in bad weather, there is not a dry spot where one can rest for a moment." The Japanese destroyer-commander finished with, "Yesterday, I looked at myself in a mirror for a long time; I was disagreeably surprised to see my face thin, full of wrinkles, and as old as though I were 50. My clothes (uniform) cover nothing but
12784-590: The remaining two-sevenths, fore and aft, are the crew's quarters; officers forward and the men placed aft. And even in those spaces are placed anchor engines, steering engines, steam pipes, etc. rendering them unbearably hot in tropical regions." The TBD's first major use in combat came during the Japanese surprise attack on the Russian fleet anchored in Port Arthur at the opening of the Russo-Japanese War on 8 February 1904. Three destroyer divisions attacked
12920-461: The shells' predicted trajectory. This was called deflection gun-laying, where "off-set" angles for range and elevation were set on the gunsight and updated as their target moved. In this method, when the sights were on the target, the barrel was pointed at the target's future position. Range and height of the target determined fuse length. The difficulties increased as aircraft performance improved. The British dealt with range measurement first, when it
13056-458: The ship at least had the armament to deal with them. Another forerunner of the torpedo-boat destroyer (TBD) was the Japanese torpedo boat Kotaka ( Falcon ), built in 1885. Designed to Japanese specifications and ordered from the Isle of Dogs, London Yarrow shipyard in 1885, she was transported in parts to Japan, where she was assembled and launched in 1887. The 165-foot (50 m) long vessel
13192-529: The single artillery branch has been responsible for both home and overseas ground-based air defence, although there was divided responsibility with the Royal Navy for air defence of the British Isles in World War I . However, during the Second World War , the RAF Regiment was formed to protect airfields everywhere, and this included light air defences. In the later decades of the Cold War this included
13328-477: The speed and direction of both the target and the projectile. Throughout the 20th century, air defence was one of the fastest-evolving areas of military technology, responding to the evolution of aircraft and exploiting technology such as radar, guided missiles and computing (initially electromechanical analogue computing from the 1930s on, as with equipment described below). Improvements were made to sensors, technical fire control, weapons, and command and control. At
13464-494: The standard for future Italian destroyers. Armed with three 152 mm and four 76 mm guns after being completed as scout cruisers, the two warships were officially re-rated as destroyers by the Romanian Navy . The two Romanian warships were thus the destroyers with the greatest firepower in the world throughout much of the interwar period. As of 1939, when the Second World War started, their artillery, although changed,
13600-422: The start of the 20th century these were either very primitive or non-existent. Initially sensors were optical and acoustic devices developed during World War I and continued into the 1930s, but were quickly superseded by radar, which in turn was supplemented by optoelectronics in the 1980s. Command and control remained primitive until the late 1930s, when Britain created an integrated system for ADGB that linked
13736-545: The start of the 21st century, destroyers are the global standard for surface-combatant ships, with only two nations (the United States and Russia ) officially operating the heavier cruisers , with no battleships or true battlecruisers remaining. Modern guided-missile destroyers are equivalent in tonnage but vastly superior in firepower to cruisers of the World War II era, and are capable of carrying nuclear-tipped cruise missiles . At 510 feet (160 m) long,
13872-411: The steam-driven displacement (that is, not hydroplaning ) torpedo boat had become redundant as a separate type. Germany, nevertheless, continued to build such boats until the end of World War I, although these were effectively small coastal destroyers. In fact, Germany never distinguished between the two types, giving them pennant numbers in the same series and never giving names to destroyers. Ultimately,
14008-520: The subsequent Mahan class and Gridley classes (the latter of 1934) increased the number of torpedo tubes to 12 and 16, respectively. In the Mediterranean, the Italian Navy's building of very fast light cruisers of the Condottieri class prompted the French to produce exceptional destroyer designs. The French had long been keen on large destroyers, with their Chacal class of 1922 displacing over 2,000 tons and carrying 130 mm guns;
14144-463: The target and having its height. Second, that the target would maintain a steady course, speed and height. This HAA was to engage targets up to 24,000 ft (7.3 km). Mechanical time fuses were required because the speed of powder burning varied with height, so fuse length was not a simple function of time of flight. Automated fire ensured a constant rate of fire that made it easier to predict where each shell should be individually aimed. In 1925
14280-429: The technology of the time would allow - several boilers and engines or turbines. Above deck, one or more quick-firing guns were mounted in the bows, in front of the bridge; several more were mounted amidships and astern. Two tube mountings (later on, multiple mountings) were generally found amidships. Between 1892 and 1914, destroyers became markedly larger; initially 275 tons with a length of 165 feet (50 m) for
14416-512: The term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War . Before World War II , destroyers were light vessels with little endurance for unattended ocean operations; typically, a number of destroyers and a single destroyer tender operated together. After
14552-573: The term "torpedo boat" came to be attached to a quite different vessel – the very fast-hydroplaning, motor-driven motor torpedo boat . Navies originally built TBDrs to protect against torpedo boats, but admirals soon appreciated the flexibility of the fast, multipurpose vessels that resulted. Vice-Admiral Sir Baldwin Walker laid down destroyer duties for the Royal Navy: Early destroyers were extremely cramped places to live, being "without
14688-545: The threat had evolved once again. Submarines were more effective, and aircraft had become important weapons of naval warfare; once again the early-war fleet destroyers were ill-equipped for combating these new targets. They were fitted with new light antiaircraft guns, radar , and forward-launched ASW weapons, in addition to their existing dual-purpose guns , depth charges , and torpedoes. Increasing size allowed improved internal arrangement of propulsion machinery with compartmentation , so ships were less likely to be sunk by
14824-427: The threat of a torpedo-boat attack to a battle fleet was considered to exist only when at anchor, but as faster and longer-range torpedo boats and torpedoes were developed, the threat extended to cruising at sea. In response to this new threat, more heavily gunned picket boats called "catchers" were built, which were used to escort the battle fleet at sea. They needed significant seaworthiness and endurance to operate with
14960-449: The turbine-powered Turbinia at the 1897 Spithead Navy Review, which, significantly, was of torpedo-boat size, prompted the Royal Navy to order a prototype turbine-powered destroyer, HMS Viper of 1899. This was the first turbine warship of any kind, and achieved a remarkable 34 knots (63 km/h; 39 mph) on sea trials. By 1910, the turbine had been widely adopted by all navies for their faster ships. The second development
15096-467: The two funnels. Later, the bow torpedo tube was removed and two more 6-pounder guns added, instead. They produced 4,200 hp from a pair of Thornycroft water-tube boilers, giving them a top speed of 27 knots, giving the range and speed to travel effectively with a battle fleet. In common with subsequent early Thornycroft boats, they had sloping sterns and double rudders. The French navy, an extensive user of torpedo boats, built its first TBD in 1899, with
15232-409: The war and accumulated large amounts of data that was subjected to extensive analysis. As a result, they published the two-volume Textbook of Anti-Aircraft Gunnery in 1924–1925. It included five key recommendations for HAA equipment: Two assumptions underpinned the British approach to HAA fire; first, aimed fire was the primary method and this was enabled by predicting gun data from visually tracking
15368-595: The war at sea was fired on 5 August 1914 by HMS Lance , one of the 3rd Destroyer Flotilla , in an engagement with the German auxiliary minelayer Königin Luise . Destroyers were involved in the skirmishes that prompted the Battle of Heligoland Bight , and filled a range of roles in the Battle of Gallipoli , acting as troop transports and as fire-support vessels, as well as their fleet-screening role. Over 80 British destroyers and 60 German torpedo boats took part in
15504-437: The war ended, it was clear that the increasing capabilities of aircraft would require better means of acquiring targets and aiming at them. Nevertheless, a pattern had been set: anti-aircraft warfare would employ heavy weapons to attack high-altitude targets and lighter weapons for use when aircraft came to lower altitudes. World War I demonstrated that aircraft could be an important part of the battlefield, but in some nations it
15640-401: The war, because destroyers had expended all their torpedoes in an initial salvo. The British V and W classes of the late war had sought to address this by mounting six torpedo tubes in two triple mounts, instead of the four or two on earlier models. The V and W classes set the standard of destroyer building well into the 1920s. Two Romanian destroyers Mărăști and Mărășești , though, had
15776-540: The war, destroyers grew in size. The American Allen M. Sumner -class destroyers had a displacement of 2,200 tons, while the Arleigh Burke class has a displacement of up to 9,600 tons, a difference of nearly 340%. Moreover, the advent of guided missiles allowed destroyers to take on the surface-combatant roles previously filled by battleships and cruisers. This resulted in larger and more powerful guided missile destroyers more capable of independent operation. At
15912-532: The weapon afterwards, describing it as "A very good idea, this weapon of yours. It will save our cordite ". (This was prophetic: while possibly apocryphal stories of projectors mounted on trawlers being used to fire 'spuds' (potatoes) at low-flying German aircraft for the want of Mills bombs led to the nickname 'potato thrower'. 'spud gun' etc.) Regardless of the successful trial results the Mk II proved to be highly inaccurate when fired at distant moving targets: only
16048-440: The years immediately after World War I, the prospect of another major war seemed remote, particularly in Europe, where the most militarily capable nations were, and little financing was available. Four years of war had seen the creation of a new and technically demanding branch of military activity. Air defence had made huge advances, albeit from a very low starting point. However, it was new and often lacked influential 'friends' in
16184-492: Was HMS Rattlesnake , designed by Nathaniel Barnaby in 1885, and commissioned in response to the Russian War scare . The gunboat was armed with torpedoes and designed for hunting and destroying smaller torpedo boats . Exactly 200 feet (61 m) long and 23 feet (7.0 m) in beam, she displaced 550 tons. Built of steel, Rattlesnake was unarmoured with the exception of a 3 ⁄ 4 -inch protective deck. She
16320-570: Was armed with a single 4-inch/25-pounder breech-loading gun , six 3-pounder QF guns and four 14-inch (360 mm) torpedo tubes, arranged with two fixed tubes at the bow and a set of torpedo-dropping carriages on either side. Four torpedo reloads were carried. A number of torpedo gunboat classes followed, including the Grasshopper class, the Sharpshooter class , the Alarm class , and
16456-452: Was armed with four 1-pounder (37 mm) quick-firing guns and six torpedo tubes, reached 19 knots (35 km/h), and at 203 tons, was the largest torpedo boat built to date. In her trials in 1889, Kotaka demonstrated that she could exceed the role of coastal defense, and was capable of accompanying larger warships on the high seas. The Yarrow shipyards, builder of the parts for Kotaka , "considered Japan to have effectively invented
16592-533: Was assumed that some form of ammunition would be provided by the British Army , who were overseeing the trials but these were overlooked and the trial was set to be delayed until one officer thought to bring out the bottles of beer that were to have been served at lunch: the smooth bore of the Projector allowed even these irregular projectiles to be fired successfully, with all striking the target with an explosion of glass and foam. The Prime Minister commented on
16728-586: Was capable of providing data suitable for controlling AA guns, and the British Radar, Gun Laying, Mark I , was designed to be used on AA gun positions and was in use by 1939. The Treaty of Versailles prevented Germany having AA weapons, and for example, the Krupps designers joined Bofors in Sweden. Some World War I guns were retained and some covert AA training started in the late 1920s. Germany introduced
16864-581: Was determined by time of flight, but the burning rate of the gunpowder was affected by altitude. The British pom-poms had only contact-fused ammunition. Zeppelins , being hydrogen-filled balloons, were targets for incendiary shells and the British introduced these with airburst fuses, both shrapnel type-forward projection of incendiary "pot" and base ejection of an incendiary stream. The British also fitted tracers to their shells for use at night. Smoke shells were also available for some AA guns, these bursts were used as targets during training. German air attacks on
17000-404: Was electrical; the operator entered the target range and had displays at guns; it was used with their 75 mm. The British Wilson-Dalby gun director used a pair of trackers and mechanical tachymetry; the operator entered the fuse length, and deflection angles were read from the instruments. By the start of World War I , the 77 mm had become the standard German weapon, and came mounted on
17136-467: Was indifferent. Antisubmarine weapons changed little, and ahead-throwing weapons, a need recognized in World War I, had made no progress. During the 1920s and 1930s, destroyers were often deployed to areas of diplomatic tension or humanitarian disaster. British and American destroyers were common on the Chinese coast and rivers, even supplying landing parties to protect colonial interests. By World War II,
17272-462: Was placed by the Royal Navy for 1,000 of the Mk I models and the weapons proved just as successful in action; the first confirmed success was reported only three weeks after the initial batch was sent out when a Heinkel aircraft was damaged. While direct hits were rare, the bombs fired by the projector displayed an unexpected property — the explosion would leave a large puff of black smoke, absent from ground-based explosions from similar grenades. Firing
17408-518: Was probably first used by the UK when Air Defence of Great Britain (ADGB) was created as a Royal Air Force command in 1925. However, arrangements in the UK were also called "anti-aircraft", abbreviated as AA , a term that remained in general use into the 1950s. After the First World War it was sometimes prefixed by "light" or "heavy" (LAA or HAA) to classify a type of gun or unit. Nicknames for anti-aircraft guns include "AA", "AAA" or "triple-A" (abbreviations of "anti-aircraft artillery"), "flak" (from
17544-476: Was realised that range was the key to producing a better fuse setting. This led to the height/range finder (HRF), the first model being the Barr & Stroud UB2, a two-metre optical coincident rangefinder mounted on a tripod. It measured the distance to the target and the elevation angle, which together gave the height of the aircraft. These were complex instruments and various other methods were also used. The HRF
17680-580: Was replaced by the nine-foot optical base UB 7 and the eighteen-foot optical base UB 10 (only used on static AA sites). Goertz in Germany and Levallois in France produced five m (16 ft) instruments. However, in most countries the main effort in HAA guns until the mid-1930s was improving existing ones, although various new designs were on drawing boards. From the early 1930s eight countries developed radar ; these developments were sufficiently advanced by
17816-554: Was soon joined by the height/fuse indicator (HFI), this was marked with elevation angles and height lines overlaid with fuse length curves, using the height reported by the HRF operator, the necessary fuse length could be read off. However, the problem of deflection settings — "aim-off" — required knowing the rate of change in the target's position. Both France and the UK introduced tachymetric devices to track targets and produce vertical and horizontal deflection angles. The French Brocq system
17952-587: Was still close to cruiser standards, amounting to nine heavy naval guns (five of 120 mm and four of 76 mm). In addition, they retained their two twin 457 mm torpedo tubes and two machine guns, plus the capacity to carry up to 50 mines. The next major innovation came with the Japanese Fubuki class or "special type", designed in 1923 and delivered in 1928. The design was initially noted for its powerful armament of six 5-inch (127 mm) guns and three triple torpedo mounts. The second batch of
18088-501: Was the guns protecting spotting balloons, in which case the altitude could be accurately measured from the length of the cable holding the balloon. The first issue was ammunition. Before the war it was recognised that ammunition needed to explode in the air. Both high explosive (HE) and shrapnel were used, mostly the former. Airburst fuses were either igniferious (based on a burning fuse) or mechanical (clockwork). Igniferious fuses were not well suited for anti-aircraft use. The fuse length
18224-496: Was the prospect of strategic air attack that was the main issue, presenting both a threat and an opportunity. The experience of four years of air attacks on London by Zeppelins and Gotha G.V bombers had particularly influenced the British and was one of if not the main driver for forming an independent air force. As the capabilities of aircraft and their engines improved it was clear that their role in future war would be even more critical as their range and weapon load grew. However, in
18360-475: Was the replacement of the torpedo boat-style turtleback foredeck by a raised forecastle for the new River-class destroyers built in 1903, which provided better sea-keeping and more space below deck. The first warship to use only fuel oil propulsion was the Royal Navy's TBD HMS Spiteful , after experiments in 1904, although the obsolescence of coal as a fuel in British warships was delayed by oil's availability. Other navies also adopted oil, for instance
18496-519: Was to protect their own battle fleet from enemy torpedo attacks and to make such attacks on the battleships of the enemy. The task of escorting merchant convoys was still in the future. An important development came with the construction of HMS Swift in 1884, later redesignated TB 81. This was a large (137 ton) torpedo boat with four 47 mm quick-firing guns and three torpedo tubes. At 23.75 knots (43.99 km/h; 27.33 mph), while still not fast enough to engage enemy torpedo boats reliably,
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