The RWD 8 was a Polish parasol wing monoplane trainer aircraft produced by RWD . It was used from 1934 to 1939 by the Polish Air Force and civilian aviation.
88-501: The RWD 8 was designed in response to a Polish Air Force requirement in 1931 for a basic trainer aircraft . It was designed by the RWD team of Stanisław Rogalski , Stanisław Wigura and Jerzy Drzewiecki . The first prototype (registration SP-AKL), was flown in early 1933. It won the contest for the new Polish military trainer, against the PZL-5bis and Bartel BM-4h biplanes . It was considered
176-1065: A radar display based on this information. The aim of programmable displays is to speed pilot training by replicating as far as possible the systems a pilot will find in an operational aircraft. Lead-in fighter training (LIFT) utilises advanced jet trainer aircraft with avionics and stores-management capability that emulate operational fighter planes, to provide efficient training in combat scenarios with reduced training costs compared to moving straight to operational conversion. The on-board avionics system may be linked to ground-based systems, and together they can simulate situations such as infrared or radar guided missile, interceptors, air-to-air and surface-to-air missiles, anti-aircraft batteries, radars, chaff and flare countermeasures and collision warnings, in low or dense electronic warfare environments. Systems may also be able to re-enact true-to-life combat situations. Most military jet-powered combat aircraft have two-seat trainer versions. These are combat capable operational conversion aircraft types to provide on
264-400: A light aircraft , with two or more seats to allow for a student and instructor. The two seating configurations for trainer aircraft are: pilot and instructor side by side, or in tandem, usually with the pilot in front and the instructor behind. The side-by-side seating configuration has the advantage that the pilot and instructor can see each other's actions, allowing the pilot to learn from
352-526: A Byzantine invention of the previous century, could not only be thrown by flamethrowers at the enemy but also in stone and ceramic jars. Later, glass containers were employed. In Song China (960–1279), weapons known as ' thunder crash bombs ' ( 震天雷 ) were created when soldiers packed gunpowder into ceramic or metal containers fitted with fuses. A 1044 military book, Wujing Zongyao ( Compilation of Military Classics ), described various gunpowder recipes in which one can find, according to Joseph Needham ,
440-690: A Primary trainer, of which the Stearman PT-13 /PT-17 is the best known, a Basic trainer such as the Vultee BT-13 , and an advanced trainer such as the well known North American AT-6 Texan, which would also be widely exported to the Commonwealth countries as the Harvard. In addition, production of various combat types was diverted to training although considerable effort was made to cover all possible types of training with purpose built types. The British organized
528-453: A candidate may progress to basic, or primary, trainers. These are usually turboprop trainers, like the Pilatus PC-9 and Embraer Tucano . Modern turboprop trainers can replicate the handling characteristics of jet aircraft as well as having sufficient performance to assess a candidate's technical ability at an aircraft's controls, reaction speed and the ability to anticipate events. Prior to
616-439: A candidate seeks to develop their flying skills. In operational training the candidate learns to use their flying skills through simulated combat, attack and fighter techniques. Typically, contemporary military pilots learn initial flying skills in a light aircraft not too dissimilar from civilian training aircraft. In this phase pilot candidates are screened for mental and physical attributes. Aircraft used for this purpose include
704-702: A fast jet design and manufacturing capability. With increasing costs, even major air forces will have difficulty reaching the economies of scale to justify development of new advanced trainers. Nations will be required to continue to push the modernisation of existing aircraft (some such as the Hawk dating from the 1970s) or co-operate in the development and procurement of advanced training aircraft. Furthermore, they must better utilise funding available by developing aircraft with an enhanced combat capability by producing operational single-seat variants, and better utilise aircraft on inventory incorporating operational systems either within
792-561: A five-second fuze with a match-tip that was ignited by striking on a ring on the soldier's hand. William Mills , a hand grenade designer from Sunderland , patented, developed and manufactured the " Mills bomb " at the Mills Munition Factory in Birmingham , England in 1915, designating it the No.5. It was described as the first "safe grenade". They were explosive-filled steel canisters with
880-496: A graduated training regimen is not just monetary but also in lives. For example, for many years the Indian Air Force operated without a suitable advanced training aircraft, leading to a high casualty rate as pilots moved to high performance MiG-21 aircraft without suitable assessment of their aptitude for supersonic flight. There are two main areas for instruction, flight training and operational training. In flight training
968-529: A grenade which could operate in either fragmentation or blast mode (selected at any time before throwing), the electronically fuzed enhanced tactical multi-purpose ( ET-MP ) hand grenade. During the Great War, handgrenades were frequently used by troops, lacking other means to defend against enemy tanks threatening to over-run the position, to various success. The Interwar period saw some limited development of grenades specifically intended to defeat armour, but it
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#17328693970131056-404: A hand grenade, the objective is to have the grenade explode so that the target is within its effective radius while keeping the thrower out of the same. For this reason, several systems has been used to trigger the explosion. Impact was the first used, with fragile containers of Greek fire that ruptured when landing. Later impact fuzes contained some kind of sensitive explosive to either initiate
1144-514: A hard synthetic material or steel, are designed to rupture and fragment on detonation, sending out numerous fragments ( shards and splinters ) as fast-flying projectiles. In modern grenades, a pre-formed fragmentation matrix inside the grenade is commonly used, which may be spherical, cuboid, wire or notched wire. Most anti-personnel (AP) grenades are designed to detonate either after a time delay or on impact. Grenades are often spherical, cylindrical, ovoid or truncated ovoid in shape, and of
1232-505: A loud popping noise and a puff of smoke on detonation. The grenade body can be reused. Another type is the throwing practice grenade which is completely inert and often cast in one piece. It is used to give soldiers a feel for the weight and shape of real grenades and for practicing precision throwing. Examples of practice grenades include the K417 Biodegradable Practice Hand Grenade by CNOTech Korea. When using
1320-460: A pilot commission, but show other attributes, may be offered the chance to qualify as navigators and weapons officers. Smaller and more financially restricted air forces may use ultra-light aircraft , gliders and motor gliders for this role. The USAF Academy uses light piston-powered aircraft such as the Cirrus SR20 (designated T-53A) for basic cadet flight training. After the ab-initio phase
1408-544: A reconnaissance aircraft and a trainer for the Nationalist forces. In the invasion of Poland 1939, the RWD 8s were used in 13 liaison flights, three aircraft in each, assigned to Armies. Many other aircraft were mobilized during the campaign and used in improvised liaison units. An advantage of the RWD 8 was its capability for short take off and landing on unprepared fields, but the missions of their crews were dangerous. RWD 8s of
1496-459: A size that fits the hand of an average-sized adult. Some grenades are mounted at the end of a handle and known as " stick grenades ". The stick design provides leverage for throwing longer distances, but at the cost of additional weight and length, and has been considered obsolete by western countries since the Second World War and Cold War periods. A friction igniter inside the handle or on
1584-446: A spring-loaded striker hit the cap after the grenade is released like the Mills bomb with the latter being predominant since WWII. There is also an alternative technique of throwing, where the grenade is not thrown immediately after the fuze is ignited, which allows the fuze to burn partially and decrease the time to detonation after throwing; this is referred to as "cooking". A shorter delay
1672-483: A time delay or on impact. Modern fragmentation grenades, such as the United States M67 grenade , have a wounding radius of 15 m (49 ft) – half that of older style grenades, which can still be encountered – and can be thrown about 40 m (130 ft). Fragments may travel more than 200 m (660 ft). These grenades are usually classed as offensive weapons because the effective casualty radius
1760-402: A triggering pin and a distinctive deeply notched surface. This segmentation is often erroneously thought to aid fragmentation , though Mills' own notes show the external grooves were purely to aid the soldier to grip the weapon. Improved fragmentation designs were later made with the notches on the inside, but at that time they would have been too expensive to produce. The external segmentation of
1848-602: A very stable and well-handling aircraft. Since the DWL ( Doświadczalne Warsztaty Lotnicze ) workshops – a manufacturer of RWD designs – had limited production capability, the Polish military decided to produce the aircraft in a nationalized factory PWS ( Podlaska Wytwórnia Samolotów ). DWL gave away the licence free of charge, only for covering design costs. PWS produced aircraft for both military and civilian aviation, while DWL produced aircraft for civilian use only. The first PWS-built RWD 8
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#17328693970131936-415: A viable air defence fighter. As the capabilities of front-line aircraft have increased, this has been reflected in increasingly sophisticated advanced trainers. As the costs of developing new aircraft have risen in real terms, it has become more likely that fewer aircraft will be designed specifically for the training role. The advanced trainer was often seen as a stepping stone by most nations in developing
2024-405: Is a class of aircraft designed specifically to facilitate flight training of pilots and aircrews. The use of a dedicated trainer aircraft with additional safety features—such as tandem flight controls, forgiving flight characteristics and a simplified cockpit arrangement—allows pilots-in-training to safely advance their skills in a more forgiving aircraft. Civilian pilots are normally trained in
2112-549: Is at this stage that a pilot begins to learn to operate radar systems and electronics. Modern advanced trainers feature programmable multi-function displays which can be programmed to simulate different electronic systems and scenarios. Most advanced trainers do not have radar systems of their own, but onboard systems can be programmed to simulate radar contacts. With datalinks and GPS , virtual radar systems can be created with similarly equipped aircraft relaying to each other their positions in real time and onboard computers creating
2200-533: Is much less than the distance it can be thrown, and its explosive power works better within more confined spaces such as fortifications or buildings , where entrenched defenders often occupy. The concussion effect, rather than any expelled fragments, is the effective killer. In the case of the US Mk3A2 , the casualty radius is published as 2 m (6 ft 7 in) in open areas, but fragments and bits of fuze may be projected as far as 200 m (660 ft) from
2288-545: Is the predominant system today, developed from the match-fuzes that were hand-lit in the early grenades. From there, two sub-groups were developed: friction-ignitors where a cord is pulled or a cap is twisted to ignite the delay-fuze like on the German Stielhandgranate; the other being strike- or percussion-ignitors where the user either hit the cap before the throw like on the Japanese Type 10 grenade , or have
2376-529: Is useful to reduce the ability of the enemy to take cover, throw or kick the grenade away and can also be used to allow a fragmentation grenade to explode into the air over defensive positions. Concerned with a number of serious incidents and accidents involving hand grenades, Ian Kinley at the Swedish Försvarets materielverk identified the two main issues as the time-fuze's burntime variation with temperature (slows down in cold and speeds up in heat) and
2464-676: The BAC Jet Provost / BAC Strikemaster and the Cessna T-37 Tweet / A-37 Dragonfly . Especially against opponents operating without a fighter screen or an effective anti-aircraft capability, such trainer derived attack aircraft could perform adequately. For example, Impala aircraft derived from the Aermacchi MB-326 trainer formed the main strike strength of the South African Air Force in its Bush war , and aircraft such as
2552-574: The Boeing 707 was a popular airliner for conversion to tanker, transport and ELINT variants by numerous air forces. A minority of military training aircraft, such as the Beechcraft 18 , Vickers Varsity , Hawker Siddeley Dominie and Boeing T-43 were developed from transport designs to train navigators and other rear crews operators. As these navigational trainees are normally learning how to navigate using instruments, they can be seated at consoles within
2640-567: The British Commonwealth Air Training Plan , which moved the bulk of aircrew training away from active war zones to Canada and elsewhere, where pilots started on the De Havilland Tiger Moth or Fleet Finch basic trainers before continuing on North American Harvards for advanced training, Avro Ansons , Airspeed Oxfords and Bristol Bolingbrokes for multi-engine as well as bombing training. Obsolete types such as
2728-847: The Fairey Battle and Westland Lysander were used for target towing, while other types such as the North American Yale were used for wireless operator (radio) training. Postwar, the United States operated the Beechcraft T-34 Mentor for basic flight training, while the United Kingdom operated the De Havilland Chipmunk . The North American T-28 Trojan replaced the T-6 in US service, while
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2816-644: The Governor of Jamaica in 1721. Improvised grenades were increasingly used from the mid-19th century, the confines of trenches enhancing the effect of small explosive devices. In a letter to his sister, Colonel Hugh Robert Hibbert described an improvised grenade that was employed by British troops during the Crimean War (1854–1856): We have a new invention to annoy our friends in their pits. It consists in filling empty soda water bottles full of powder, old twisted nails and any other sharp or cutting thing we can find at
2904-671: The Hales rifle grenade , developed a modern hand grenade in 1906 but was unsuccessful in persuading the British Army to adopt the weapon until 1913. Hale's chief competitor was Nils Waltersen Aasen , who invented his design in 1906 in Norway, receiving a patent for it in England. Aasen began his experiments with developing a grenade while serving as a sergeant in the Oscarsborg Fortress . Aasen formed
2992-561: The Hawker Hunter , English Electric Lightning , and North American F-100 Super Sabre . As air forces' combat fleets were scaled-down, it made sense for most national display teams to change to lighter training types. A few modifications may be needed to enable coloured smoke to be emitted during displays, but essentially these airframes can still perform their pilot training function. In smaller air forces basic trainers, in addition to being used for training, are used to provide air support in
3080-511: The Home Guard as an anti-tank weapon. It was produced in vast numbers; by August 1941 well over 6,000,000 had been manufactured. Sting grenades, also known as stingball or sting ball grenades, are stun grenades based on the design of the fragmentation grenade. Instead of using a metal casing to produce fragmentation, they are made from hard rubber and are filled with around 100 rubber or plastic balls. On detonation, these balls, and fragments from
3168-515: The Hongdu JL-8 are being acquired for the attack role in low intensity theatres. Despite their vulnerability, even small numbers of weapons-carrying trainer aircraft may achieve a disproportionate effect due to the element of surprise, especially when the attacked side believes to hold air supremacy. Forces that have used light trainer aircraft to great effect include the Biafran use of MFI-9s and
3256-546: The Iraqi insurgency in the early 2000s against lightly armoured mine-resistant ambush protected (MRAP) vehicles, designed for protection only against improvised explosive devices , as well as drone ordnance in Ukraine 2022–2024. During World War II the United Kingdom used incendiary grenades based on white phosphorus . One model, the No. 76 special incendiary grenade , was mainly issued to
3344-609: The Jacobites in the battles of Killiecrankie and Glen Shiel . These grenades were not very effective owing both to the unreliability of their fuse, as well inconsistent times to detonation, and as a result, saw little use. Grenades were also used during the Golden Age of Piracy , especially during boarding actions; pirate Captain Thompson used "vast numbers of powder flasks, grenade shells, and stinkpots" to defeat two pirate-hunters sent by
3432-546: The Liberation Tigers of Tamil Eelam use of covertly acquired light aircraft. In high-intensity conflicts, advanced trainer type aircraft can have a military utility if they operate under an umbrella of other aerial assets. For example, the Franco-German Dassault/Dornier Alpha Jet had an anti-shipping and light strike role when operating under an air umbrella provided by fighter aircraft, while
3520-553: The Percival Provost filled a similar role with the RAF. Grenade A grenade is a small explosive weapon typically thrown by hand (also called hand grenade ), but can also refer to a shell (explosive projectile ) shot from the muzzle of a rifle (as a rifle grenade ) or a grenade launcher . A modern hand grenade generally consists of an explosive charge ("filler"), a detonator mechanism, an internal striker to trigger
3608-879: The Slingsby Firefly , as at one time used by the United States Air Force Academy , and the Scottish Aviation Bulldogs of the RAF. The U.S. replaced the Firefly and the Enhanced Flight Screen Program (EFSP) with the Diamond DA20 and the Initial Flight Training (IFT) program. At the end of this stage, pilot trainees are assessed and those who pass advance to the full pilot training program. Those who are judged unsuitable for
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3696-551: The counter-insurgency and airborne forward air control role. Most advanced trainers are capable of carrying and delivering war loads. However, most of these aircraft do not have the counter measures and sensors required to survive alone in a modern high intensity war fighting scenario, for example being vulnerable to MANPADS . However, they may still have a war fighting role in low intensity theatres if operated in conjunction with more capable aircraft. Historically many jet trainers were marketed with specialised attack variants e.g.
3784-449: The springs , the striker spring in particular, coming pre-tensioned from the factory by mechanism designs that had not changed much since the 1930s. In 2019, a new mechanism, fully interchangeable with the old ones, was adopted into service. The main difference, apart from a fully environmentally stable delay, is that the springs now are twist-tensioned by the thrower after the transport safety (pin and ring) has been removed, thus eliminating
3872-496: The 1930s, many of the initial aircraft were designed with a dual role, so that when they were obsolete in their combat role they would be used as trainers. By World War II, however, their needs exceeded what could be spared from production and although using a number of purpose built designs such as the Bücker Bü 131 , relied largely on captured aircraft and obsolete combat types. The United States armed forces standardized on three types –
3960-731: The Aasenske Granatkompani in Denmark, which before the First World War produced and exported hand grenades in large numbers across Europe. He had success in marketing his weapon to the French and was appointed as a Knight of the French Legion of Honour in 1916 for the invention. The Royal Laboratory developed the No. 1 grenade in 1908. It contained explosive material with an iron fragmentation band, with an impact fuze , detonating when
4048-554: The Germans in airworthy condition. In Romania and Hungary they were used until the late 1940s. None returned to Poland after the war, and today, none have survived. Data from Jane's all the World's Aircraft 1937, Polish Aircraft 1893–1939, Polskie konstrukcje lotnicze 1893-1939 General characteristics Performance Related development Aircraft of comparable role, configuration, and era Trainer aircraft A trainer
4136-653: The Paraguayan troops used hand grenades in their attempt to board Brazilian ironclad warships with canoes. Hand grenades were used on naval engagements during the War of the Pacific . During the Siege of Mafeking in the Second Boer War , the defenders used fishing rods and a mechanical spring device to throw improvised grenades. Improvised hand grenades were used to great effect by
4224-575: The Polesie Operational Group were the last Polish aircraft in the sky during the campaign. They were flying reconnaissance missions during the Battle of Kock , and even threw hand grenades . A great number of RWD 8s were bombed by the Germans in air bases (unlike Polish combat aircraft) or burned by withdrawing Poles. A total of 57 aircraft were withdrawn to Romania , about 40 to Latvia and 2 to Hungary . Only some dozen aircraft were captured by
4312-467: The Polish aviation sport. A small number were exported: three were sold to Palestine , one to Spain, Morocco and Brazil. Licences for building the RWD 8 was sold to Estonia (one aircraft was produced, with markings ES-RWD) and Rogozarski of Yugoslavia (a small series with radial engines was built). At least one RWD 8 was sold to Spain via Portugal during the Spanish Civil War . It was used as
4400-528: The RAF planned to use pairs of gun- and AIM-9 Sidewinder -armed Hawk trainers in the point defence role. Each pair of Hawks was to be teamed with a Phantom FGR.2 , in effect using the Phantoms as an Airborne Early Warning and Control system. Although never tested it was believed that the Hawk, combined with AIM-9L and flown by some of the best pilots in the RAF including those from the Red Arrows , would have made
4488-668: The Russian defenders of Port Arthur (now Lüshun Port ) during the Russo-Japanese War . Around the turn of the 20th century, the ineffectiveness of the available types of hand grenades, coupled with their levels of danger to the user and difficulty of operation, meant that they were regarded as increasingly obsolete pieces of military equipment. In 1902, the British War Office announced that hand grenades were obsolete and had no place in modern warfare. But within two years, following
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#17328693970134576-524: The T-44A Pegasus variant of the Beechcraft King Air . Once they have mastered this, they may begin to fly in the right-hand seat of an operational type. Some air forces will seek to use a restricted number of multi-engined aircraft, with the derivatives of a basic aircraft filling different roles so that a pilot qualified on one of its types can easily convert to others in the same family. For example,
4664-723: The Tornado, the operational conversion unit (OCU) aircraft can be created by duplicating flight controls in the rear cockpit. In a normally single-seat aircraft, a second cockpit can be built behind the original cockpit (e.g. the TA-4S variant of the A-4SU Super Skyhawk ) or the cockpit can be extended to place the instructor in a second seat behind the pilot. Once they are qualified to fly a specific type of aircraft, pilots will continue with regular training exercises to maintain qualifications on that aircraft and to improve their skills, for example
4752-447: The USAF's Red Flag exercises. Deployments of small flights of aircraft together with support staff and equipment to exercises conducted by other nations can be used to develop fighting skills and interservice and inter unit competitions in bombing and gunnery between units can also be used to develop those skills. The two-seat aircraft may itself become the basis of an operational aircraft,
4840-625: The United States began its own training program, using Curtiss JN-4s and Standard J-1s . In Germany, various obsolete two seaters were produced for training purposes, the most numerous being the Albatros C.III . Between the World Wars, purpose built trainers covering a variety of specialties largely replaced obsolete types in the Western armed forces, including aircraft specifically for bombing and gunnery and navigational training. When Germany began rearming in
4928-514: The aircraft cabin and do not require a direct view of the landscape over which the aircraft is flying. The operators of airborne weapons or radar-related systems can be similarly trained, either in training aircraft or in an operational aircraft during training flights. Some jet trainers , such as the Aermacchi MB-339 , Casa C-101 , Folland Gnat , Fouga Magister and British Aerospace Hawk , are used by national formation aerobatic teams. Early jet aerobatic teams tended to use combat types such as
5016-514: The aircraft or as external pods. The trend of programmable electronic systems and datalinks is likely to continue with the possibility that ground-based radar systems and processing systems will allow advanced training aircraft to function as if they truly had onboard radar systems, with the cockpit closely replicating the look and feel of an air force's more capable aircraft for maximum familiarity. Programmable engine management and fly-by-wire flight control systems will allow an aircraft to mimic
5104-606: The availability of high performance turboprops, basic training was conducted with jet aircraft such as the BAC Jet Provost , T-37 Tweet , and Fouga Magister . Those candidates who are not suitable to continue training as fast jet pilots may be offered flying commissions and be trained to fly multi-engined aircraft. Those that progress to training for fast jet flying will then progress to an advanced trainer, typically capable of high subsonic speeds, high-energy manoeuvers, and equipped with systems that simulate modern weapons and surveillance. Examples of such jet trainer aircraft include
5192-536: The blast.. Fragmentation grenades are common in armies. They are weapons that are designed to disperse fragments on detonation, aimed to damage targets within the lethal and injury radii. The body is generally made of a hard synthetic material or steel, which will provide some fragmentation as shards and splinters, though in modern grenades a pre-formed fragmentation matrix is often used. The pre-formed fragmentation may be spherical, cuboid, wire or notched wire. Most explosive grenades are designed to detonate either after
5280-476: The detonation point. Concussion grenades have also been used as depth charges (underwater explosives) around boats and underwater targets; some like the US Mk 40 concussion grenade are designed for use against enemy divers and frogmen . Underwater explosions kill or otherwise incapacitate the target by creating a lethal shock wave underwater. The US Army Armament Research, Development and Engineering Center (ARDEC) announced in 2016 that they were developing
5368-621: The detonator, an arming safety secured by a transport safety. The user removes the transport safety before throwing, and once the grenade leaves the hand the arming safety gets released, allowing the striker to trigger a primer that ignites a fuze (sometimes called the delay element), which burns down to the detonator and explodes the main charge. Grenades work by dispersing fragments (fragmentation grenades), shockwaves ( high-explosive , anti-tank and stun grenades ), chemical aerosols ( smoke , gas and chemical grenades ) or fire ( incendiary grenades ). Their outer casings, generally made of
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#17328693970135456-414: The enemy camp, the whole place will be set ablaze... Grenade-like devices were also known in ancient India. In a 12th-century Persian historiography, the Mojmal al-Tawarikh , a terracotta elephant filled with explosives set with a fuse was placed hidden in the van and exploded as the invading army approached. A type of grenade called the 'flying impact thunder crash bomb' (飛擊震天雷) was developed in
5544-819: The flight characteristics of frontline aircraft with actual performance being restricted to a pilot's level of ability, with more power and greater agility becoming available as a pilot's skill improves. Training is now also carried out on ground-based simulators. Early trainers were often sport aircraft or obsolete combat aircraft. The French used a graduated system in which a pilot learned in progressively more capable aircraft, starting with aircraft that had been modified to prevent them from flying – called rouleurs or penguins. Pilots who had mastered ground handling would then graduate to lower powered two seaters, before finishing on obsolete fighters. The supply of obsolete aircraft proved inadequate and production of Caudron G.III , Nieuport 83 and other types specifically for training
5632-416: The instructor and the instructor to correct the student pilot. The tandem configuration has the advantage of being closer to the normal working environment that a fast jet pilot is likely to encounter. It is now the norm for pilots to begin their flight training in an aircraft with side-by-side seating and to progress to aircraft with tandem seating. This, however, has not always been the case. For example, it
5720-443: The job training to pilots who have graduated to this level, and are usually available with little conversion in times of emergency to a reconnaissance or combat role. Most operational conversion aircraft retain the full functionality of the operational version with slight degradations to performance due to increased weight and drag, and possibly reduced range due to a reduced internal fuel load. In some two-seat fighter aircraft such as
5808-514: The late 16th century and first used in September 1, 1592 by the Joseon Dynasty during the Japanese invasions of Korea . The grenade was 20 cm in diameter, weighed 10 kg, and had a cast iron shell. It contained iron pellets, and an adjustable fuse. The grenade was used with a dedicated grenade launcher called a 'wangu' (碗口). It was used in both the besieging and defense of fortifications, to great effect. The first cast-iron bombshells and grenades appeared in Europe in 1467, where their initial role
5896-506: The main charge directly, or set off a primer charge that in turn detonates the main charge. This turned out to present significant drawbacks; either the primer is so sensitive that unintended and premature ignition happens, while a more stable substance often fails to set off the grenade when landing in softer ground, not seldom even allowing the targeted troops to hurl the grenade back. Thus, the only significant use of impact fuzes since WWI has been in anti-tank grenades. Fuze-delayed grenades
5984-600: The mid-17th century, infantry known as " grenadiers " began to emerge in the armies of Europe, who specialized in shock and close quarters combat, mostly with the usage of grenades and fierce melee combat. In 1643, it is possible that grenados were thrown amongst the Welsh at Holt Bridge during the English Civil War . The word grenade was also used during the events surrounding the Glorious Revolution in 1688, where cricket ball-sized (8.81 to 9 in (224 to 229 mm) in circumference) iron spheres packed with gunpowder and fitted with slow-burning wicks were first used against
6072-475: The most demanding aircraft. For example, in the Italian Air Force a pilot may begin his service career on the AMX attack aircraft, and as their experience grows, progress to more capable aircraft such as the Tornado IDS . Other air forces, such as Canada, do not do this, and assign first-tour pilots to aircraft such as the CF-18 Hornet . Those pilots who train to fly transports, tankers and other multi-engine aircraft begin with small multi-engine aircraft such as
6160-482: The original Mills bomb was retained, as it provided a positive grip surface. This basic "pin-and-pineapple" design is still used in some modern grenades. After the Second World War , the general design of hand grenades has been fundamentally unchanged, with pin-and-lever being the predominant igniter system with the major powers, though incremental and evolutionary improvements continuously were made. In 2012, Spränghandgranat 07 (shgr 07, "Blast hand-grenade 07")
6248-419: The prototype of the modern hand grenade. The shells ( pào ) are made of cast iron, as large as a bowl and shaped like a ball. Inside they contain half a pound of 'divine fire' ( shén huǒ , gunpowder). They are sent flying towards the enemy camp from an eruptor ( mu pào ), and when they get there a sound like a thunder-clap is heard, and flashes of light appear. If ten of these shells are fired successfully into
6336-451: The rubber casing explode outward in all directions as reduced lethality projectiles, which may ricochet. It is intended that people struck by the projectiles will receive a series of fast, painful stings, without serious injury. Some types have an additional payload of CS gas . Sting grenades do not reliably incapacitate people, so they can be dangerous to use against armed subjects. They sometimes cause serious physical injury, especially
6424-467: The rubber fragments from the casing. People have lost eyes and hands to sting grenades. Sting grenades are sometimes called "stinger grenades", which is a genericized trademark as "Stinger" is trademarked by Defense Technology for its line of sting grenades. Chemical and gas grenades burn or release a gas, and do not explode. Practice or simulation grenades are similar in handling and function to other hand grenades, except that they only produce
6512-579: The second seat being used to create a weapons officer or navigators station in aircraft with originally only a pilot, for example the F-15E Strike Eagle is a development of the F-15D which is a two-seat training version of the F-15 Eagle . In some air forces that have a mix of high- and low-performance aircraft, pilots can be first be assigned to aircraft with a lower level of performance before moving on to
6600-600: The success of improvised grenades in the trench warfare conditions of the Russo-Japanese War, and reports from General Sir Aylmer Haldane , a British observer of the conflict, a reassessment was quickly made and the Board of Ordnance was instructed to develop a practical hand grenade. Various models using a percussion fuze were built, but this type of fuze suffered from various practical problems, and they were not commissioned in large numbers. Marten Hale, known for patenting
6688-822: The supersonic Northrop T-38 Talon , Boeing–Saab T-7 Red Hawk , the BAE Hawk , the Dassault/Dornier Alpha Jet , the Aero L-39 and Aero L-159 , the Alenia Aermacchi M-346 Master , the KAI T-50 Golden Eagle , the Guizhou JL-9 and the Yakovlev Yak-130 . Effective combat aircraft are a function now of electronics as much as, if not more so than, the aerobatic ability or speed of an aircraft. It
6776-464: The time, sticking a bit of tow in for a fuse then lighting it and throwing it quickly into our neighbors' pit where it bursts, to their great annoyance. You may imagine their rage at seeing a soda water bottle come tumbling into a hole full of men with a little fuse burning away as proud as a real shell exploding and burying itself into soft parts of the flesh. In March 1868 during the Paraguayan War ,
6864-580: The top of the grenade head was used to initiate the fuse. The word grenade is likely derived from the French word spelled exactly the same, meaning pomegranate , as the bomb is reminiscent of the many-seeded fruit in size and shape. Its first use in English dates from the 1590s. Rudimentary incendiary grenades appeared in the Eastern Roman (Byzantine) Empire , not long after the reign of Leo III (717–741). Byzantine soldiers learned that Greek fire ,
6952-602: The top of the grenade hit the ground. A long cane handle (approximately 16 inches or 40 cm) allowed the user to throw the grenade farther than the blast of the explosion. It suffered from the handicap that the percussion fuse was armed before throwing, which meant that if the user was in a trench or other confined space, he was apt to detonate it and kill himself when he drew back his arm to throw it. Early in World War I , combatant nations only had small grenades, similar to Hales' and Aasen's design. The Italian Besozzi grenade had
7040-480: Was announced as the first major innovation in the area of handgrenades since the Great War . Developed by Ian Kinley at Försvarets Materielverk (FMV), shgr 07 is a self-righting, jumping hand grenade containing some 1900 balls that covers a cone 10 metres in diameter with the centre about 2 metres in height. This minimize the dangers outside the lethal zone as there is little to no random scattering of fragments from
7128-628: Was built with a rear cab covered with blinds, for blind flying training. A frame with a hook for glider towing could be attached to the aircraft. A further development of the RWD 8 was the aerobatics and training aircraft, the RWD-17 . In total, over 550 RWD 8s were built (about 80 by DWL and about 470 by PWS). Production ceased in early 1939. The RWD 8 was the most numerous aircraft manufactured in Poland up to that time. Small series of license-built produced 1935 by Rogožarski Belgrade (three aircraft). The RWD 8
7216-487: Was conventional in layout, and had mixed construction (steel and wood frame with canvas and plywood covering). The crew of two, sitting in tandem , were in an open cockpit, with individual windshields. Twin controls were fitted. Power came from a 4-cylinder air-cooled 90 kW (120 hp) straight engine PZInż. Junior (licence built Walter Junior ) (82 kW /110 hp nominal power), 120 hp Walter Major or de Havilland Gipsy Major . A two-blade wooden propeller
7304-628: Was fitted. The aircraft had a conventional landing gear , with a rear skid. The fuel tank in fuselage had 75 L (18 U.S. gal) (RWD 8 PWS) or 85 L (21 U.S. gal) (RWD 8 DWL). The wings folded rearwards. RWD 8s were used in the Polish military trainer aviation from 1934, becoming a standard type of primary trainer. In November 1938, there were 349 RWD 8s in the Air Force. RWD 8s were also used in Polish civilian aviation – particularly in regional aeroclubs. More than 80 aircraft were bought for public collection funds, in order to train aviators. They were also used in
7392-489: Was flown in September 1934. These aircraft, designated RWD 8 PWS (or RWD 8 pws), differed from the original RWD 8 DWL (or RWD 8 dwl) in minor details, mainly having thinner landing gear shock absorbers and being slightly heavier and therefore slower. Apart from the standard variant, 50 RWD 8a PWS were built with an additional 95 L (25 U.S. gal) fuel tank in thicker central wing section, giving increased range. A small series
7480-481: Was not until the outbreak of WWII serious efforts were made. While there were infantry anti-tank weapons available, they were either not ubiquitous enough, ineffective or both. Anti-tank grenades were a suitable stopgap to ensure a rudimentary capability for every squad to be used for self-defence. Once rocket-propelled shaped charges became available in greater numbers, anti-tank hand grenades became almost obsolete. However, they were still used with limited success in
7568-569: Was undertaken. In the United Kingdom, a different training system was used, although it too started out with obsolete aircraft before the Avro 504 and Airco DH.6 became the primary trainers, supplemented until the end of the First World War with obsolete combat aircraft for advanced training. To train the many potential aviators coming from Canada and the US, the Royal Flying Corps Canada was set up, operating Curtiss JN-4 (Can) trainers until
7656-642: Was usual to find tandem seating in biplane basic trainers such as the Tiger Moth and the Jungmann , and the British used side-by-side seating in the operational conversion of some of its fast jets such as the English Electric Lightning . Given the expense of military pilot training, air forces typically conduct training in phases to eliminate unsuitable candidates. The cost to those air forces that do not follow
7744-474: Was with the besieging and defense of castles and fortifications. A hoard of several hundred ceramic hand grenades was discovered during construction in front of a bastion of the Bavarian city of Ingolstadt , Germany, dated to the 17th century. Many of the grenades retained their original black powder loads and igniters. The grenades were most likely intentionally dumped in the moat of the bastion prior to 1723. By
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