venerdì 21 agosto 2020

Il Sea Fury (Furia del mare) era un caccia imbarcato ad ala bassa prodotto dall'azienda britannica Hawker Siddeley Aircraft


L'Hawker Sea Fury (Furia del mare) era un caccia imbarcato ad ala bassa prodotto dall'azienda britannica Hawker Siddeley Aircraft e sviluppato durante la seconda guerra mondiale, anche se entrò in servizio a guerra finita. 



Il Sea Fury fu l'ultimo aereo da combattimento con motore a pistoni impiegato dalla Fleet Air Arm e, probabilmente, fu il più veloce aereo con motore a pistoni mai prodotto in serie.
Dotato di fusoliera molto aerodinamica e compatta e propulso da un Bristol Centaurus da 2 500 cavalli, il Fury era in grado di raggiungere i 730 km/h; era armato con 4 cannoni da 20 millimetri.
Non venne mai acquistato dalla RAF, data la fine della guerra, ma la Fleet Air Arm della Royal Navy ne ordinò alcune centinaia, impiegate anche durante la guerra di Corea come cacciabombardiere, mentre molti altri vennero esportati. Alcuni volano ancora, trasformati spesso in aerei da competizione.
Il Sea Fury viene spesso chiamato semplicemente Fury, anche se questo può generare confusione con l'omonimo caccia biplano Hawker Fury risalente al periodo tra le due guerre mondiali.



Storia del progetto

Il progetto del Fury nacque come sviluppo del Tempest: in particolare doveva essere caratterizzato dal peso inferiore e venne valutata la possibilità di equipaggiarlo con un propulsore radiale.
Nel 1943 la RAF ne ordinò 6 prototipi per la valutazione delle tre motorizzazioni da comparare: oltre al Napier Sabre che già equipaggiava il Tempest, vennero scelti il Rolls-Royce Griffon ed il Bristol Centaurus (quest'ultimo era l'unico radiale dei tre).
Alcune fonti indicano che il progetto fosse stato realizzato partendo dall'analisi di un Focke-Wulf Fw 190: il 23 giugno 1942, il pilota della Luftwaffe Arnim Faber atterrò erroneamente con il suo caccia Fw 190-A3 presso la base di Pembrey (un aeroporto inglese sul litorale della Manica, assai simile a un aeroporto tedesco; l'atterraggio avvenne di notte, dopo una missione di bombardamento di rappresaglia). I Britannici ottennero così un esemplare funzionante del caccia che stava dando parecchio filo da torcere ai piloti della RAF. Altre fonti ritengono che tale evento sia accaduto in epoca troppo avanzata per poter influenzare la matita di Sydney Camm nel disegnare il velivolo.
Il disegno era stato nel frattempo modificato, ma ancora nel 1943, per rispondere a una richiesta (7/43) della Royal Navy per un caccia imbarcato. Il velivolo fu adattato per consentire le operazioni dalle portaerei, e prese appunto il nome di Sea Fury. Mentre la Hawker avrebbe dovuto seguire il progetto per la versione terrestre, il compito di realizzare il Sea Fury fu affidato alla Boulton Paul Aircraft Limited di Wolverhampton.
Nell'aprile del 1944, dopo un aggiornamento della specifica tecnica da parte della Royal Navy, ed a seguito dell'esito positivo delle prove di volo e dei collaudi (svolti a bordo della HMS Ocean), arrivarono i primi ordini per 200 velivoli, sia da parte della RAF che della FAA. Il primo prototipo di Sea Fury, SR661, fu portato in volo il 21 febbraio 1945, ma non aveva ancora le ali ripiegabili da portaerei. Il secondo prototipo, propulso da un nuovo motore (il Bristol Centaurus XV, con una nuova elica a 5 pale), incorporava finalmente tutte le caratteristiche richieste per il modello navale (comprese le ali ripiegabili). Le prove erano ancora in corso quando nell'agosto 1945 il Giappone si arrese.
Con la conclusione della seconda guerra mondiale, la RAF annullò i contratti di produzione del Fury, decidendo di concentrare gli sforzi sui caccia con motore a getto. La Royal Navy ridusse il relativo ordine dei Sea Fury a 100 esemplari (designati F.10) e annullò il contratto con la Boulton Paul, riassegnando pertanto i lavori di costruzione alla casa madre.
Nei reparti della Fleet Air Arm, il Sea Fury entrò in servizio nell'agosto del 1947.



Tecnica

Il Sea Fury era un monoplano ad ala bassa, con fusoliera monoscocca. Le ali erano costituite dalle sezioni esterne delle ali dell'Hawker Tempest: queste, invece di congiungersi alla fusoliera lateralmente, erano unite l'una all'altra al di sotto della fusoliera medesima. Il risultato era quello di una ridotta misura dell'apertura alare (80 cm in meno) mantenendo, però, le caratteristiche che ne avevano fatto apprezzare l'impiego nel predecessore.
Il carrello era di tipo triciclo posteriore e la cabina di pilotaggio era sovrastata da un tettuccio a goccia in grado di fornire un'ottima visibilità al pilota.
Il Sea Fury era equipaggiato con il Bristol Centaurus, un motore radiale a 18 cilindri (disposti su due stelle) caratterizzato dall'impiego di valvole a fodero capace, nelle ultime versioni, di potenze di circa 3 000 hp; l'elica era metallica, a 5 pale e con passo variabile.
L'armamento era costituito da 4 cannoni Hispano-Suiza HS.404 Mk.V calibro 20 mm e, nella versione cacciabombardiere, erano previsti carichi di caduta costituiti da razzi (12 da 3 in) e da bombe per un massimo di 2 000 lb.



Impiego operativo

Malgrado la mancata partecipazione al secondo conflitto mondiale, il Sea Fury ebbe modo di dimostrarsi una macchina estremamente valida nel corso della guerra di Corea: impiegato a partire dal 1950 nell'807th Squadron, di stanza sulla HMS Theseus, equipaggiò in seguito sia reparti della FAA (sulle portaerei HMS Ocean e HMS Glory) che quelli della Royal Australian Navy (sulla portaerei HMAS Sydney).
Durante il conflitto coreano, divenne operativa la seconda versione di produzione del Sea Fury: denominata F.B.11 e destinata al ruolo di cacciabombardiere, fu la versione prodotta nel maggior numero di unità (615 esemplari). Fu proprio con un velivolo di questa serie che, l'8 agosto 1952, il Tenente Peter Carmichael abbatté un MiG-15: uno dei pochi casi di aereo con motore a pistoni che riuscì ad abbattere un jet. Tale abbattimento risulta, per altro, anche essere l'unico ottenuto da un pilota inglese a bordo di un aereo inglese.
Gli esemplari in servizio presso l'aviazione cubana vennero impiegati per contrastare lo sbarco della Baia dei Porci del 1961.
L'impiego del Sea Fury nella Repubblica Federale Tedesca si intreccia con gli eventi del secondo dopoguerra: dopo il 1945 non era consentito ai tedeschi conseguire brevetti di pilotaggio per aerei e la stessa ricostituzione dell'aviazione militare fu completamente proibita fino all'ingresso della Germania Ovest nella NATO. I Sea Fury vennero acquistati dalla Deutsche Luftfahrt Beratungsdienst (Servizio di Consulenza Aeronautica Tedesca) per fungere da velivoli per il traino dei bersagli, necessari per l'addestramento all'uso delle armi contraerei. Questi aerei rimasero in servizio fino al 1976.
La Fleet Air Arm sostituì i propri Sea Fury con i nuovi jet Hawker Sea Hawk e Supermarine Attacker nel 1953.



Versioni

  • F.10: versione da caccia per la Royal Navy.
  • FB.11: versione caccia-bombardiere; impiegata dalla Royal Navy, dalla marina australiana e dalla marina canadese.
  • T.20: versione da addestramento a due posti, per la Royal Navy.
  • F.50: versione da combattimento per la Marina olandese.
  • FB.51: versione caccia-bombardiere per la marina olandese.
  • FB.60: versione caccia-bombardiere dell'aeronautica pakistana.
  • T.61: versione da addestramento a due posti, per l'aeronautica pakistana.


Utilizzatori

  • Australia Royal Australian Navy Fleet Air Arm
  • Birmania Tatmdaw Lei
  • Canada Royal Canadian Navy Fleet Air Arm
  • Cuba Defensa Anti-Aérea y Fuerza Aérea Revolucionaria
  • Egitto Royal Egyptian Air Force
  • Germania Deutsche Luftfahrt Beratungsdienst
  • Iraq Royal Iraqi Air Force
  • Marocco Aviation Royale Chérifienne
  • Paesi Bassi Koninklijke Luchtmacht
  • Pakistan Pakistani Fida'iyye
  • Regno Unito Fleet Air Arm - Royal Naval Volunteer Reserve.



ENGLISH

The Hawker Sea Fury is a British fighter aircraft designed and manufactured by Hawker Aircraft. It was the last propeller-driven fighter to serve with the Royal Navy, and one of the fastest production single reciprocating engine aircraft ever built. Developed during the Second World War, the Sea Fury entered service two years after the war ended. It proved to be a popular aircraft with a number of overseas militaries, and was used during the Korean War in the early 1950s, as well as against the 1961 Bay of Pigs Invasion of Cuba.
The Sea Fury's development was formally initiated in 1943 in response to a wartime requirement of the Royal Air Force (RAF), with the aircraft initially named Fury. As the Second World War drew to a close, the RAF cancelled their order for the aircraft; however, the Royal Navy saw the type as a suitable carrier aircraft to replace a range of increasingly obsolete or poorly-suited aircraft being operated by the Fleet Air Arm. Development of the Sea Fury proceeded, and the type began entering operational service in 1947.
The Sea Fury has many design similarities to Hawker's preceding Tempest fighter, having originated from a requirement for a "Light Tempest Fighter"; both the Sea Fury's wings and fuselage originate from the Tempest but were significantly modified. Production Sea Furies were fitted with the powerful Bristol Centaurus engine, and armed with four wing-mounted Hispano V cannons. While originally developed as a pure aerial fighter aircraft, the definitive Sea Fury FB.11 was a fighter-bomber, the design having been found suitable for this mission as well.
The Sea Fury attracted international orders as both a carrier and land-based aircraft. It was operated by countries including Australia, Burma, Canada, Cuba, Egypt, West Germany, Iraq, and Pakistan. The type acquitted itself well in the Korean War, fighting effectively even against the MiG-15 jet fighter.[1] Although the Sea Fury was retired by the majority of its military operators in the late 1950s in favour of jet-propelled aircraft, a considerable number of aircraft saw subsequent use in the civil sector, and several remain airworthy in the 21st century as heritage and racing aircraft.

Development

Origins

The Hawker Fury was an evolutionary successor to the successful Hawker Typhoon and Tempest fighters and fighter-bombers of the Second World War. The Fury's design process was initiated in September 1942 by Sydney Camm, one of Hawker's foremost aircraft designers, to meet the Royal Air Force's requirement for a lightweight Tempest Mk II replacement; the Tempest, while a successful aircraft, had been viewed as being heavy and oversized for typical fighter duties. Developed as the "Tempest Light Fighter (Centaurus)", the semi-elliptical wing of the Tempest was incorporated, but was shortened in span by eliminating the central bay of the wing centre-section, the inner part of the undercarriage wells now extending almost to the aircraft centreline, instead of being situated level with the fuselage sides. The fuselage was broadly similar in form to that of the Tempest, but was a fully monocoque structure, while the cockpit level was higher, affording the pilot better all-round visibility.
The project was formalised in January 1943 when the Air Ministry issued Specification F.2/42 around the "Tempest Light Fighter".[7] This was followed up by Specification F.2/43, issued in May 1943, which required a high rate of climb of not less than 4,500 ft/min (23 m/s) from ground level to 20,000 feet (6,096 m), good fighting manoeuvrability and a maximum speed of at least 450 mph (724 km/h) at 22,000 feet (6,705 m). The armament was to be four 20mm Hispano V cannon with a total capacity of 600 rounds, plus the capability of carrying two bombs each up to 1,000 pounds (454 kg). In April 1943, Hawker had also received Specification N.7/43 from the Admiralty, who sought a navalised version of the developing aircraft; in response, Sidney Camm proposed the consolidation of both services' requirements under Specification F.2/43, with the alterations required for naval operations issued on a supplemental basis. Around 1944, the aircraft project finally received its name; the Royal Air Force's version becoming known as the Fury and the Fleet Air Arm's version as the Sea Fury.
Six prototypes were ordered; two were to be powered by Rolls-Royce Griffon engines, two with Centaurus XXIIs, one with a Centaurus XII and one as a test structure. Hawker used the internal designations P.1019 and P.1020 respectively for the Griffon and Centaurus versions, while P.1018 was also used for a Fury prototype which was to use a Napier Sabre IV. The first Fury to fly, on 1 September 1944, was NX798 with a Centaurus XII with rigid engine mounts, powering a Rotol four-blade propeller. Second on 27 November 1944 was LA610, which had a Griffon 85 and Rotol six-blade contra-rotating propeller. By now, development of the Fury and Sea Fury was closely interlinked so that the next prototype to fly was a Sea Fury, SR661, described under "Naval Conversion." NX802 (25 July 1945) was the last Fury prototype, powered by a Centaurus XV. LA610 was eventually fitted with a Napier Sabre VII, which was capable of developing 3,400 to 4,000 hp (2,535–2,983 kW); this aircraft became possibly the fastest reciprocating-engine Hawker aircraft after reaching a speed of around 485 mph (780 km/h).

Naval version

With the end of the Second World War in Europe in sight, the RAF began cancelling many aircraft orders. Thus, the RAF's order for the Fury was cancelled before any production examples were built because the RAF already had large numbers of late Mark Spitfires and Tempests and viewed the Fury as an unnecessary overlap with these aircraft. Although the RAF had pulled out of the programme, development of the type continued as the Sea Fury. Many of the Fleet Air Arm's carrier fighters were Lend-Lease Corsairs or Seafires. The Seafire had considerable drawbacks as a naval aircraft, notably the narrow undercarriage, whilst the Corsairs had to be returned or purchased. The Admiralty opted to procure the Sea Fury as the successor to these aircraft.
While the RAF contract had been cancelled, the Fury prototypes were completed and used for work in developing the Sea Fury as well as for the export market. The first Sea Fury prototype, SR661, first flew at Langley, Berkshire, on 21 February 1945, powered by a Centaurus XII engine. This prototype had a "stinger"-type tailhook for arrested carrier landings, but lacked folding wings for storage. SR666, the second prototype, which flew on 12 October 1945, was powered by a Bristol Centaurus XV that turned a new, five-bladed Rotol propeller and featured folding wings. Specification N.7/43 was modified to N.22/43, now representing an order for 200 aircraft. Of these, 100 were to be built at Boulton-Paul's Wolverhampton factory.
In 1945, the original order to specification N.22/43 was reduced to 100 aircraft; as a result, the manufacturing agreement with Boulton-Paul was ended and all work on the Sea Fury transferred to Hawker Aircraft's facilities at Kingston. This included the construction of what was intended to be a Boulton-Paul built Sea Fury prototype, VB857, which was transported to Kingston in January 1945; this aircraft, built to the same standard as SR666, first flew on 31 January 1946. Immediately upon completion of the first three airframes, the flight testing programme began at Kingston. It was soon discovered that the early Centaurus engine suffered frequent crankshaft failure due to a poorly designed lubrication system, which led to incidents of the engine seizing while in mid-flight. The problem was resolved when Bristol's improved Centaurus 18 engine replaced the earlier engine variant.

Into production

The first production model, the Sea Fury F Mk X (later Sea Fury F.10), flew in September 1946. With the completion of flight testing at Boscombe Down in 1946, the trials process was repeated aboard the aircraft carrier HMS Victorious. Carrier testing revealed directional stability issues related to rudder effectiveness during landing, and this was resolved by the adoption of a tail wheel lock, which also improved the wheel retraction behaviour. Several rectifying design changes were made by Hawker in response to feedback from the test pilots, including the adoption of a five-bladed Rotol propeller to greatly reduce overspeed tendencies; a re-designed rudder assembly, to increase rudder effectiveness; Dynafocal engine mountings to reduce vibration at low speeds, and an improved undercarriage with greater flexibility. These changes greatly improved the aircraft's deck landing characteristics. Arrestor hook trials initially revealed the Sea Fury to be prone to missing the wires; this was rapidly resolved by modifications to the hook dampener mechanism.
By March 1947, production Sea Furies were already being produced for the Fleet Air Arm. The fourth and sixth production aircraft were used in further trials with HMS Illustrious, and the main change from the earlier aircraft was the adoption of a longer, stiffer arrestor hook. Fifty Mk X Sea Furies were produced. These were identical to the SR666 prototype except for the Centaurus 18 engine and four-bladed propeller. At least 20 of the 50 aircraft performed in the aircraft's intensive trials programme. Following the successful completion of weapons trials at the A&AEE Boscombe Down, the Sea Fury was cleared for operational use on 31 July 1947.
Hawker Aircraft continued to develop and refine the Sea Fury Mk X, resulting in the more capable Sea Fury Mk 11, also known as the Sea Fury FB.11. This upgraded model had several improvements, most notable being the hydraulically powered wing folding mechanism which eased flight deck operations and the adoption of new weapons for performing air-to-ground combat. Iraq ordered a two-seat Sea Fury model and the British Admiralty followed suit. During testing, the rear canopy collapsed, leading to a redesign of the type's two-seat cockpit prior to entering service. Designated as the Sea Fury T.20, a total of 60 trainers were manufactured for the Fleet Air Arm between 1950 and 1952. The Royal Navy bought a total of 615 Sea Furies, mostly of the Mk 11 standard.

Export market

Hawker Aircraft was keen to market the Sea Fury to foreign operators, and conducted an intense sales drive for their export version of the aircraft, designated Sea Fury F.50. On 21 October 1946, the Royal Netherlands Navy placed an order for ten F.50 aircraft, which were basically identical to the FAA's Sea Fury Mk X aircraft, to equip the aircraft carrier HNLMS Karel Doorman (ex-HMS Venerable). The Dutch also ordered twelve of the later Fury FB.60s in 1948 and these were delivered in 1950. A manufacturing licence was also acquired for the production of twenty-five Sea Fury FB.51s by Fokker Aircraft in the Netherlands, which were delivered from 1951 onwards.
The Sea Fury became an export success, being purchased both to operate on foreign aircraft carriers and for purely land-based roles by a number of nations, including Australia, West Germany, Iraq, Egypt, Burma, Pakistan and Cuba. Several of the nations that did not have active aircraft carriers often had the tail hooks and catapult hooks removed from their aircraft.
A final variant, the Sea Fury T.20S was developed by Hawker for West Germany as target tow aircraft; these remained in service into the 1970s. Upon the type's withdrawal from military service, a large number of Sea Furies were sold to private individuals, often as a racing aircraft due to its high speed. The final production figures for all marks reached around 860 aircraft.

Design

The Sea Fury is a navalised aircraft, capable of operating from the aircraft carriers of the Royal Navy. It was heavily based on preceding Hawker fighter aircraft, particularly the Tempest; features such as the semi-elliptical wing and fuselage were derived directly from the Tempest but featured significant refinements, including significant strengthening to withstand the stresses of carrier landings. While the Sea Fury was lighter and smaller than the Tempest, advanced aspects of the Sea Fury's design such as its Centaurus engine meant it was also considerably more powerful and faster; the Sea Fury has the distinction of being the final and fastest of Hawker's reciprocating engine aircraft, as well as being one of the fastest production reciprocating engine fighters ever produced.
The performance of the Sea Fury was striking; in comparison with the 15 years older Hawker Fury biplane the Sea Fury was nearly twice as fast and had double the rate of climb despite far heavier equipment and greater range. The Sea Fury Mk X was capable of attaining a maximum speed of 460 mph and climb to a height of 20,000 feet in under five minutes. The Sea Fury was reportedly a highly aerobatic aircraft with favourable flying behaviour at all heights and speeds, although intentional spinning of the aircraft was banned during the type's military service. During flight displays, the Sea Fury could demonstrate its ability to perform rapid rolls at a rate of 100 degrees per second, attributed to the spring tab equipped ailerons. For extra thrust on takeoff Jet Assisted Take Off (JATO) could be used.
The Sea Fury was powered by the newly developed Bristol Centaurus reciprocating engine, which drove a five-bladed propeller. Many of the engine's subsystems, such as the fully automated cooling system, cockpit gauges, and fuel booster pump were electrical, powered by an engine-driven generator supplemented by two independent batteries. The hydraulic system, necessary to operate the retractable undercarriage, tail hook, and flaps, was pressurised to 1,800 psi by an engine-driven pump. If this failed, a hand pump in the cockpit could also power these systems. A pneumatic pump was driven by the engine for the brakes. Internal fuel was stored in a total of five self-sealing fuel tanks, two within the fuselage directly in front of the cockpit and three housed within the wings.
Various avionics systems were used on Sea Furies; in this respect it was unusually well equipped for an aircraft of the era. Many aircraft would be equipped with on-board radar, often the ARI 5307 ZBX, which could be directly integrated with a four-channel VHF radio system. Several of the navigational aids, such as the altimeter and G2F compass, were also advanced; many of these subsystems would appear on subsequent jet aircraft with little or no alteration. Other aspects of the Sea Fury, such as the majority of the flight controls, were conventional. Some controls were electrically powered, such as the weapons controls, on-board cameras, and the gyro gunsight.
Although the Sea Fury had been originally developed as a pure air superiority fighter, the Royal Navy viewed the solid construction and payload capabilities of the airframe as positive attributes for ground attack as well; accordingly, Hawker tested and cleared the type to use a wide range of armaments and support equipment. Each aircraft had four wing-mounted 20 mm Hispano V cannon, with up to 16 rocket projectiles, or a combination of 500 lb or 1000 lb bombs being carried too. Other loads included 1000 lb incendiary bombs, mines, type 2 smoke floats or 90 gallon fuel tanks. The Sea Fury could also be fitted with both vertical and oblique cameras with a dedicated control box in the cockpit, for photo reconnaissance missions. Other ancillary equipment included chaff to evade hostile missile attack and flares.

Operational history

United Kingdom

778 Naval Air Squadron was the first unit of the Fleet Air Arm to receive the Sea Fury, with deliveries commencing in February 1947 to the squadron's Intensive Flying Development Unit, while 787 Squadron, the Naval Air Fighting Development Squadron, received the Sea Fury in May that year. The first operational unit to be equipped with the Sea Fury was 803 Naval Air Squadron of the Royal Canadian Navy, which replaced Seafires with Sea Furies in August 1947, with 807 Naval Air Squadron was the first operational Royal Navy Sea Fury squadron when it received the aircraft in September that year. The Seafire was ill-suited to carrier use, as the pilot's poor view of the deck and the aircraft's narrow undercarriage made both landings and takeoffs difficult. Consequently, the Sea Fury F Mk X replaced the Seafire on most carriers. For some years the Sea Fury and Seafire operated alongside each other, with the shorter-range Seafire operating as a fleet defence fighter while the Sea Fury was employed as a longer-range fighter-bomber.
Sea Furies were issued to Nos. 736, 738, 759 and 778 Squadrons of the Fleet Air Arm. The F Mk X was followed by the Sea Fury FB.11 fighter-bomber variant, which eventually reached a production total of 650 aircraft. The Sea Fury remained the Fleet Air Arm's primary fighter-bomber until 1953, at which point jet-powered aircraft, such as the Hawker Sea Hawk and Supermarine Attacker, were introduced to operational service.
The Sea Fury FB.11 entered service with the fighter squadrons of the Royal Naval Volunteer Reserve (RNVR) in August 1951. The RNVR units also operated the Sea Fury T.20 two-seat trainer version from late 1950 to give reserve pilots experience on the type before relinquishing their Supermarine Seafire aircraft. RNVR units which were equipped with the Sea Fury were Nos. 1831, 1832, 1833, 1834, 1835 and 1836 Squadrons. No. 1832, based at RAF Benson, was the last RNVR squadron to relinquish the type in August 1955 for the jet-powered Supermarine Attacker.

Korean War

Following the outbreak of the Korean War on 25 June 1950, Sea Furies were dispatched to the region as a part of the British Commonwealth Forces Korea, Britain's contribution to the United Nations multinational task force to assist South Korea following an invasion by North Korea. Sea Furies were flown throughout the conflict, primarily as ground-attack aircraft, from the Royal Navy light fleet carriers HMS Glory, HMS Theseus, HMS Ocean, and the Australian carrier HMAS Sydney. After a Fleet Air Arm Seafire was shot down by a United States Air Force Boeing B-29 Superfortress on 28 July 1950, all Commonwealth aircraft were painted with black and white invasion stripes.
The first Sea Furies arrived with 807 Naval Air Squadron embarked on Theseus, which relieved HMS Triumph in October 1950. Operations on Theseus were intense, and the Sea Furies of 807 Squadron flew a total of 264 combat sorties in October. During a brief rest period at the Japanese port of Iwakuni the catapult was found to be excessively worn, necessitating the launch of Sea Furies with RATOG assistance until it was repaired. In December 1950, Sea Furies conducted several strikes on bridges, airfields, and railways to disrupt North Korean logistics, flying a further 332 sorties without incurring any losses. At this early point in the war little aerial resistance was encountered and the biggest threats were ground-based anti-aircraft fire or technical problems.
In addition to their ground attack role, Sea Furies also performed air patrols. In this role a total of 3,900 interceptions were carried out, although none of the intercepted aircraft turned out to be hostile. During the winter period, the Sea Furies were often called upon as spotter aircraft for UN artillery around Inchon, Wonsan, and Songiin. In April 1951, 804 Naval Air Squadron operating off Glory, replaced 807 Squadron, which in turn was replaced by Sydney in September 1951 with 805 and 808 Squadron RAN. The Australian carrier air group flew 2,366 combat sorties. In January 1952, Glory with 804 NAS returned to relieve Sydney following a refit in Australia. For the rest of the war Glory and Ocean relieved each other on duty.
In 1952, the first Chinese MiG-15 jet fighters appeared. On 8 August 1952, Lieutenant Peter "Hoagy" Carmichael, of 802 Squadron, flying Sea Fury WJ232 from HMS Ocean, was credited with shooting down a MiG-15, marking him as one of only a few pilots of a propeller-driven aircraft to shoot down a jet during the Korean War. The engagement occurred when Sea Furies and Fireflies were engaged by eight MiG-15s, during which one Firefly was badly damaged while the Sea Furies escaped unharmed. Some sources claim that this is the only successful engagement by a British pilot in a British aircraft during the Korean War, although a few sources claim a second MiG was downed or damaged in the same action.

Australia

Australia was one of three Commonwealth nations to operate the Sea Fury, with the others being Canada and Pakistan. The type was operated by two frontline squadrons of the Royal Australian Navy, 805 Squadron and 808 Squadron; a third squadron that flew the Sea Fury, 850 Squadron, was also briefly active. Two Australian aircraft carriers, HMAS Sydney and HMAS Vengeance, employed Sea Furies in their air wings. The Sea Fury was used by Australia during the Korean War, flying from carriers based along the Korean coast in support of friendly ground forces. The Sea Fury would be operated by Australian forces between 1948 and 1962.

Burma

Between 1957 and 1958, Burma received 21 Sea Furies, the majority of them being ex-FAA aircraft. The Sea Fury was frequently employed as a counter-insurgency platform in Burmese service and on 15 February 1961, a Republic of China Air Force Consolidated PB4Y Privateer was intercepted and shot down by a Sea Fury near the Thai-Burmese border. Of the aircraft's crew, five were killed and two were captured. The aircraft had been on a supply run to Chinese Kuomintang forces fighting in northern Burma. It is believed that the Burmese Sea Furies were retired in 1968, and replaced by armed Lockheed T-33 Shooting Stars.

Canada

The Royal Canadian Navy (RCN) became a significant customer of the Sea Fury, and many of its aircraft were diverted from existing Royal Navy contracts. On 23 June 1948, the first aircraft was accepted at RCAF Rockcliffe. The type was quickly put to use replacing Canada's existing inventory of Seafires, taking on the primary role of fleet air defence operating from the aircraft carrier HMCS Magnificent. Two Canadian squadrons operated the Sea Fury, Nos. 803 and 883 Squadrons, which were later renumbered as 870 and 871. Pilot training on the Sea Fury was normally conducted at the RCN's HMCS Shearwater land base. Landing difficulties with the Sea Fury were experienced following the RCN's decision to convert to the U.S. Navy's deck landing procedures, which were prone to overstressing and damaging the airframes, as the Sea Fury had been designed for a tail-down landing attitude. The Sea Fury would be operated between 1948 and 1956 by the RCN, whereupon they were replaced by the jet-powered McDonnell F2H Banshee. The retired aircraft were put into storage, and some were subsequently purchased by civilians.

Cuba

In 1958 during the Cuban Revolution, the Fuerza Aérea del Ejercito de Cuba (FAEC) purchased a total of 17 refurbished (ex-Fleet Air Arm) Sea Furies from Hawker, comprising fifteen FB.11s and two T.20 trainers. The aircraft were briefly flown by FAEC prior to the ousting of President Fulgencio Batista and the assumption of power by Fidel Castro. Following the change in government, the Sea Furies were retained by the Fuerza Aérea Revolucionaria ("Revolutionary Air Force"; FAR); these aircraft proved difficult to keep operational, partially because the new military lacked personnel experienced with the type.
In April 1961, during the Bay of Pigs Invasion, air support for the Cuban exiles' Brigade 2506 was provided by ex-USAF, CIA-operated Douglas B-26B Invaders; United States President John F. Kennedy had decided against involving U.S. Navy aircraft. The only FAR fighter aircraft to see combat were three Sea Furies and five Lockheed T-33 armed jet trainers belonging to the Escuadrón Persecución y Combate ("Pursuit & Combat Squadron"), based at the San Antonio de los Baños and Antonio Maceo air bases.
In pre-emptive attacks on 15 April, two Sea Furies were destroyed on the ground, one at Ciudad Libertad and one in a hangar near Moa. During the ensuing aerial combat, a single airborne Sea Fury was lost during the Invasion.
In the early hours of 17 April, Brigade 2506 began to land at Playa Girón. Around 06:30, a FAR formation composed of three Sea Furies, one B-26 and two T-33s started attacking the exiles' ships. At about 06:50, 8.0 kilometres (5.0 mi) south of Playa Larga, the transport ship Houston was damaged by rockets and cannons from FAR aircraft, including Sea Furies piloted by Major Enrique Carreras Rojas and Captain Gustavo Bourzac; Houston caught fire and was abandoned. While attempting to land at an airbase, Carreras Rojas's Sea Fury was attacked and damaged by a CIA B-26; he was able to abort his approach and escape. Carreras Rojas later shot down another B-26. While attempting to shoot down a Curtiss C-46 transport aircraft, Nicaraguan-born pilot Carlos Ulloa crashed in the Bay of Pigs around 08:30, either due to an engine stall or being hit by anti-aircraft fire. Around 09:30, multiple FAR aircraft destroyed an ammunition ship, Rio Escondido. A Sea Fury piloted by Lieutenant Douglas Rudd also destroyed a B-26.

Netherlands

The Netherlands was the first export customer for the Sea Fury, and the Netherlands Royal Navy operated the aircraft from two of their aircraft carriers, both of which were named HNLMS Karel Doorman as they were operated at separate periods from one another. It was common for Royal Netherlands Navy vessels to operate alongside Royal Navy ships, thus Dutch Sea Furies also regularly operated from FAA land bases and RN carriers. During 1947, Dutch Sea Furies operating from HNLMS Karel Doorman were employed in a ground support capacity against insurgent fighters in the Dutch East Indies. The Dutch procured and licence-built additional Sea Furies for carrier operations, although the type was ultimately replaced by the jet-powered Hawker Sea Hawk from the late 1950s onwards.

Pakistan

One of the largest export customers for the type was Pakistan. In 1949, an initial order for 50 Sea Fury FB.60 aircraft for the Pakistan Air Force was placed. A total of 87 new-build Sea Furies were purchased and delivered between 1950 and 1952; some ex-FAA and Iraqi Sea Furies were also subsequently purchased. The aircraft was operated by three frontline squadrons, Nos. 5, 9, and 14 Squadrons. The Sea Fury began to be replaced by the jet-powered North American F-86 Sabre in 1955, and the last Sea Furies in Pakistani service were ultimately retired in 1960.

Variants

Fury Prototypes
  • LA610 Originally ordered as a Hawker Tempest III, it was completed as a Fury prototype and first flew on 27 November 1944.
  • NX798 One of two Fury prototypes to specification F.2/43, the first to fly on 1 September 1944.
  • NX802 One of two Fury prototypes to specification F.2/43.
Sea Fury prototypes
  • SR661 A semi-navalised Fury prototype to Specification N.22/43, first flew on 21 February 1945 with a Centarus XII engine (later changed to a Centarus XVIII) and Rotol four-bladed propeller, did not have folding wings.
  • SR666 A fully navalised Fury prototype to Specification N.22/43, first flew on 12 October 1945 with a Centarus XV engine and a Rotol five-bladed propeller.
  • VB857 Sea Fury X prototype built by Boulton-Paul and first flew on 31 January 1946 with a Centarus XVI, later used as a FB11 prototype with a Centarus XVIII engine.
  • Sea Fury T.20 prototype
  • VX818 Prototype two-seat training variant to Specification N.19/47, originally ordered by Iraq it first flew on 15 January 1948.
Fury
  • RAF order for 200 aircraft placed on 28 April 1944; order cancelled.
  • Sea Fury F.10
  • Single-seat fighter version for the Royal Navy, 50 built by Hawker, an order for a further 300 placed at the same time to be built by Boulton Paul was cancelled. First production aircraft flew on 15 August 1946.
Sea Fury FB.11
  • Single-seat fighter-bomber for the Royal Navy, Royal Australian Navy, Royal Canadian Navy and Royal Netherlands Navy, 615 built, including 31 for the RAN and 53 for the RCN.
Sea Fury T.20
  • Two-seat training version for the Royal Navy, 61 built. Ten of these were later converted to target tugs (designated T.20S) for West Germany, operated by the civilian company Deutscher Luftfahrt-Beratungsdienst (DLB).
Sea Fury F.50
  • Single-seat fighter version for the Royal Netherlands Navy, 10 built.
Sea Fury FB.51
  • Single-seat fighter-bomber version for the Royal Netherlands Navy, 25 built.
Fury FB.60
  • Single-seat fighter-bomber version for the Pakistan Air Force and the Royal Netherlands Navy, 93 built for Pakistan and 12 for the Netherlands.
Fury T.61
  • Two-seat training version for the Pakistan Air Force, five built.
Fury I
  • Single-seat land-based fighter version for the Iraqi Air Force. Unofficially known as the "Baghdad Furies", 55 built.
Fury Trainer
  • Two-seat training version for the Iraqi Air Force, five built.

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Intermarine ha consegnato il cacciamine El Kasseh 2 alla Marina Algerina


Il cantiere navale italiano Intermarine, filiale del gruppo industriale Immsi SpA (IMS.MI), ha consegnato di recente alla Marina Militare Algerina la seconda unità cacciamine costruita in Italia: la El Kasseh 2. L'Algeria ha ordinato la prima nave di contromisure mine alla fine del 2014 con un'opzione per una seconda. La Marina nazionale algerina ha messo in servizio la sua prima nave contromisure mine (MCMV), El-Kasseh 1 (501) il 30 settembre 2017. 




La classe El Kasseh 2 deriva dalle unità classe Katanpää costruite per la Marina finlandese che sono una classe di tre navi cacciamine multiuso (MCMV) ordinate dalla Marina finlandese al cantiere navale italiano Intermarine SpA
Il cacciamine della società Intermarine ha:
  • una lunghezza di 52,5 metri; 
  • una larghezza di 10 metri;
  • un dislocamento totale di circa 700 tonnellate; 
  • è alimentato da due motori diesel;
  • raggiunge una velocità massima compresa tra 13 e 16 nodi. 
La struttura - compreso lo scafo - è realizzata utilizzando la tecnica di costruzione monoscocca non irrigidita a pelle unica, con vetroresina sviluppata appositamente per questo tipo di progetto. 



Le sovrastrutture, realizzate in configurazione sandwich costituita da due strati di fibra di vetro e fibra di carbonio, racchiudono un'anima in legno di balsa e sono realizzate mediante il processo di infusione di resina.



ENGLISH

Intermarine delivered the El Kasseh 2 minesweeper to the Algerian Navy
The Italian shipyard Intermarine, a subsidiary of the industrial group Immsi SpA (IMS.MI), recently delivered to the Algerian Navy the second minesweeper built in Italy: the El Kasseh 2. Algeria ordered the first mine countermeasures ship at the end of 2014 with an option for a second one. The Algerian National Navy commissioned its first mine countermeasures ship (MCMV), El-Kasseh 1 (501) on 30 September 2017. 
The El Kasseh 2 class is derived from the Katanpää class units built for the Finnish Navy which are a class of three multi-purpose minesweeper ships (MCMV) ordered by the Finnish Navy from the Italian shipyard Intermarine SpA The minesweeper of the company Intermarine:
  • a length of 52.5 metres; 
  • a width of 10 metres;
  • a total displacement of approximately 700 tonnes; 
  • is powered by two diesel engines;
  • it reaches a maximum speed of between 13 and 16 knots. 
The structure - including the hull - is built using the single-skin, non-rigid monocoque construction technique, with fibreglass specially developed for this type of project. The superstructures, made in a sandwich configuration consisting of two layers of fibreglass and carbon fibre, enclose a balsa wood core and are made using the resin infusion process.

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Il missile MGR-1 "Honest John", letteralmente "Giovanni l'Onesto"


L’MGR-1 "Honest John", letteralmente "Giovanni l'Onesto", fu il primo razzo d'artiglieria tattico nucleare o convenzionale statunitense. Fino agli inizi degli anni '90 poteva capitare di trovarlo in servizio in paesi che non avevano ricevuto il MGM-52 Lance come designato successore, come nel caso della Corea del Sud.



Cenni storici

L'Honest John, designato MGR-1 nella prima versione, compì i primi test nel 1951 nel poligono di White Sands, ed entrò in linea già nel 1953, ma il successivo MGR-1B giunse in linea solo 7 anni dopo.
Aveva una massa complessiva di 2.136 kg nel modello B, con una testata nucleare W31 da 2,2 o da 40 Kiloton (kT), ma potevano essere montate anche testate convenzionali. La lunghezza era di 7,75 m, con un diametro di 0,76 m.
La sua funzione era quella di vettore tattico per armi nucleari da 5-25 ktm, al servizio dell'esercito, su gittate tra i 7 e i 48 km. Non si trattava certo di un'arma particolarmente potente, a parte le sue capacità nucleari, ed il CEP (raggio dal centro del bersaglio designato entro cui almeno la metà delle armi va a segno) era di ben 830 m. Per l'arma erano disponibili anche testate HE da 680 kg, praticamente solo da esercitazione, e chimiche da 564 kg. Una testata a submunizioni fu pure realizzata e venduta nel 1977 alla Corea del Sud.
Il vettore dell'Honest John era un autocarro TEL 6x6 con una robusta rampa elevabile. L'Honest John venne fornito a diversi eserciti della NATO: Italia, Belgio, Canada, Danimarca, Francia, Grecia, Norvegia, Paesi Bassi e Turchia e al Giappone, Corea del Sud e infine Taiwan.



L'impiego in Italia

In Italia fu in servizio presso la 3ª Brigata missili "Aquileia" di Portogruaro. Difatti il 10 gennaio 1959 quarantaquattro artiglieri del 3º Reggimento artiglieria pesante furono selezionati ed ospitati presso la Southern European Task Force (S.E.TA.F.) nella Caserma "Carlo Ederle" di Vicenza per familiarizzare col nuovo sistema d'arma, il missile nucleare tattico MGR-1 "Honest John".
L'addestramento dei militari italiani fu condotto con il supporto del 77th F.A.Bn. - Field Artillery Battalion - e durò 55 giorni. Il 25 febbraio 1959, alle ore 10:21, avvenne il primo lancio di un missile tattico MGR-1 "Honest John" da parte dei quarantaquattro militari italiani addestrati, dal litorale adriatico di Bibione, ripetuti poi nelle campagne di lancio annuali effettuate sull'altopiano di Asiago o in Sardegna.



Storia e sviluppo

Sviluppato presso il Redstone Arsenal, in Alabama, l’Honest John era un grande ma semplice razzo stabilizzato, del peso di 5.820 libbre (2.640 kg) nella sua versione iniziale, dotato di armi nucleari M31. Era montato sul retro di un camion, e veniva puntato più o meno allo stesso modo di un cannone e quindi sparato su di una rampa elevata, accendendo quattro piccoli razzi rotanti che lo libravano in volo dalla fine della rampa. L'M31 aveva un raggio d’azione di 15,4 miglia (24,8 km) con una testata nucleare da 20 chilotoni ed era anche in grado di trasportare una testata convenzionale da 1.500 libbre (680 kg).
Il sistema M31 includeva un razzo a combustibile solido montato su di un camion, non guidato, trasportato in tre parti separate. L'Honest John veniva assemblato sul campo prima del lancio, montato su un lanciatore M289, puntato e lanciato in circa 5 minuti. Il razzo era originariamente equipaggiato con una testata nucleare W7, con una resa variabile fino a 20 kilotoni di TNT (84  TJ ); nel 1959 fu schierata una testata W31 con tre varianti con rese di 2, 10 o 30 kt (8,4, 41,8 o 125,5 TJ). C'era una variante W31 di 20 kt (84 TJ) utilizzata esclusivamente per il sistema antiaereo Nike Hercules. L'M31 aveva un'autonomia compresa tra 5,5 e 24,8 km.
I primi test rivelarono più dispersione sul bersaglio di quanto fosse accettabile quando si trasportavano carichi utili convenzionali. Lo sviluppo di un Honest John aggiornato, denominato M50, fu intrapreso per migliorare la precisione ed estendere la portata. La dimensione delle pinne venne notevolmente ridotta e fu applicato un maggiore spin per ripristinare il margine di stabilità positivo che era stato perso quando le dimensioni delle pinne furono ridotte. L'M50 migliorato, con le pinne più piccole e più "rigatura", aveva una portata massima di oltre 30 miglia con una dispersione sul bersaglio di soli 250 iarde (230 m), dimostrando una precisione vicina a quella dell'artiglieria convenzionale. L'Honest John venne prodotto dalla Douglas Aircraft Company di Santa Monica, in California.
Negli anni '60 erano disponibili anche munizioni a grappolo di gas nervino Sarin, progettate per essere intercambiabili per l'uso con Honest John o MGM-5 Corporal. Inizialmente la testata a grappolo M79 (E19R1) GB, contenente 356 bombe M134 (E130R1) per la M31A1C Honest John. Il modello di produzione era la testata a grappolo M190 (E19R2) GB, contenente 356 bombe M139 (E130R2) quando l'M31A1C fu gradualmente eliminato a favore dell'XM50 Honest John. In condizioni nominali aveva un'area di effetto media di 0,9 chilometri quadrati.



Varianti

Le due versioni di base di Honest John erano:
  • MGR-1A (M31) era lungo 27 piedi 3 pollici (8,30 m), aveva un diametro del motore di 22 
7 / 8  in (580 mm), un diametro testata 30 in (760 mm), un arco pinna di 9 ft 1 a (2,77 m), pesava 5.820 lb (2.640 kg) (nucleare), e aveva un intervallo di 3,4 -15,4 mi (5,5-24,8 km). Ilmotore a razzo a propellente solido M6 di Hercules Powder Company misurava 16 piedi 5 
7 / 16  pollici (5.015 m) lungo, pesava 3,937 libbre (1,786 kg), e aveva 99.000 lb f (441 kN) di spinta.
  • MGR-1B (M50) era lungo 26 piedi 0 pollici (7,92 m), aveva un diametro del motore di 22,8 pollici (580 mm), un diametro della testata di 30 pollici (760 mm), un'apertura delle alette di 4 piedi 6 pollici (1,37 m), pesava 4.320 libbre (1.960 kg) (nucleare) e aveva una portata massima di 30 mi (48 km), praticamente il doppio di quella dell'M31. Una formulazione propellente migliorata ha dato al motore a razzo una spinta di 150.000 libbref (666 kN). 


Produzione e implementazione

La produzione delle varianti MGR-1 terminò nel 1965, con una produzione totale di oltre 7.000 razzi. Il naso a bulbo dell'Honest John e la caratteristica rampa di lancio montata su di un camion lo hanno reso un simbolo facilmente riconoscibile della Guerra Fredda nelle basi dell'esercito in tutto il mondo e nelle armerie della Guardia Nazionale negli Stati Uniti. Anche se non era guidato ed era il primo missile balistico nucleare statunitense, aveva una vita utile più lunga rispetto a tutti gli altri missili balistici statunitensi tranne il sistema Minuteman. Il sistema fu sostituito con il missile MGM-52 Lance nel 1973, ma fu schierato con le unità della Guardia Nazionale negli Stati Uniti fino al 1983. Honest Johns armati convenzionalmente rimasero negli arsenali di Grecia, Turchia e Corea del Sud almeno fino al fine anni '90.
Quando gli ultimi Honest Johns furono ritirati dall'Europa alla fine degli anni '80 (e sostituiti dal razzo di artiglieria M-26 non guidato), il razzo aveva prestato servizio con le forze militari di Belgio, Gran Bretagna, Canada, Danimarca (non nucleare), Francia, Germania, Grecia, Italia, Paesi Bassi, Norvegia (non nucleare), Corea del Sud, Taiwan (non nucleare) e Turchia.

Origine del nome

Alla fine del 1950, il maggiore generale Holger Toftoy era un colonnello che sovrintendeva allo sviluppo del razzo. Il progetto rischiava di essere cancellato "per il fatto che un razzo così grande e non guidato non avrebbe potuto avere la precisione per giustificare ulteriori fondi". Durante un viaggio a White Sands Missile Range, Toftoy incontrò un texano incline a fare dichiarazioni incredibili. Ogni volta che qualcuno esprimeva dubbi sulle affermazioni dell'uomo, rispondeva: "Perché, da queste parti, mi chiamo 'Honest John!'" Poiché il progetto era in discussione, Toftoy riteneva che il soprannome fosse appropriato per il razzo e suggerì il nome ai suoi superiori. 

Veicoli di supporto

Veicoli utilizzati con la piattaforma Honest John:
  • Rimorchio M33, lanciatore,
  • Camion M46, unità di riscaldamento e ancoraggio (G744)
  • Camion M289, lanciarazzi, ( camion M139 ) (G744),
  • Rimorchio M329, trasportatore di razzi, (G821)
  • Camion M386, razzo, 762 mm, binario di lancio corto, 5 tonnellate (camion M139)
  • Unità di movimentazione M405, montata su rimorchio,
  • Gruppo carrello M465 , trasporto, razzo da 762 mm.

Esemplari sopravvissuti:
  • Canada Museo militare CFB Petawawa, CFB Petawawa, Petawawa, Ontario. Il Museo centrale del reggimento reale dell'artiglieria canadese, Shilo Manitoba
  • Danimarca Il Museo dell'Arsenale Reale Danese
  • Olanda Il Museo Militare Nazionale
  • Regno Unito Museo Imperiale della Guerra Duxford - Museo della Royal Air Force
  • Stati Uniti - 3° Museo della Cavalleria, 1° Museo del Cav, Fort Hood, Texas - 45th Infantry Museum , Oklahoma City, Oklahoma - Air Force Space & Missile Museum, Cape Canaveral Air Force Station, Florida - American Armored Foundation, Inc. Tank & Ordnance War Memorial Museum, Danville, Virginia - Bedford, Indiana, esposto all'esterno di un negozio di eccedenze militari, all'angolo sud-ovest di US-50 / IN-37 e IN-450. - Museo militare di Camp Atterbury, Camp Atterbury, Indiana. - Carolinas Aviation Museum, Charlotte, North Carolina (Due missili sono in mostra - entrambi provenivano dal Florence Air & Missile Museum) - Crestwood, Illinois, in mostra al parco municipale. - Combat Air Museum, Topeka, Kansas - Museo di Fort Lewis, Fort Lewis, Washington - Field Artillery Museum, Fort Sill, Oklahoma - Museo Nazionale Atomico, Kirtland AFB, Albuquerque, Nuovo Messico - Rock Island Arsenal, Arsenal Island, tra Iowa e Illinois - Museo delle forze militari del Texas a Camp Mabry, Austin, Texas - Underwood Public School, Underwood, Minnesota. - Stati Uniti Space & Rocket Center, Huntsville, Alabama - Yuma Proving Ground, Yuma, Arizona - Milledgeville High School, Milledgeville, Illinois (sede dei Milledgeville Missiles) - Miami Central High School Miami, Florida Sede dei "ROCKETS". - AC Reynolds High School Asheville, North Carolina Sede dei "ROCKETS". - Esposizione all'aperto, Spokane, Washington - angolo sud-ovest di Sanson e mercato nel quartiere di Hillyard
  • Display esterno, St. Albans Roadside Park, St. Albans, West Virginia - Esposizione all'aperto, White Sands Missile Range Museum, New Mexico  - Neenah High School, Neenah, Wisconsin - Esposizione all'aperto, M50 dal 6° Bn 112th FA in mostra all'Armeria di Cape May Courthouse, Cape May, New Jersey.

Ex operatori

  • Belgio - Esercito belga - Utilizzato in varie unità di artiglieria di corpo e divisione (75, 3, 20 e 14° battaglione di artiglieria) dal 1960 al 1978. Sostituito dal missile Lance.
  • Canada Esercito canadese - Il Canada ha adottato l'MGR-1B con la testata W31 da 1 chiloton. Quattro unità furono assegnate a 1 batteria missilistica superficie-superficie, artiglieria reale canadese a Hemer, Germania, con 4 CIBG. Da due a quattro unità sono state fornite a 2 SSM Battery presso CFB Shilo in Manitoba per l'addestramento. Queste unità furono formate nel settembre 1960. 1SSM mantenne una prontezza molto elevata e in grado di schierarsi rapidamente sulle posizioni di fuoco. La loro capacità di mantenere il camuffamento ha impedito anche alle forze speciali della NATO d'élite di localizzarle durante le esercitazioni. 1SSM è stato autorizzato a indossare la sciarpa nera dei cannonieri Congreve. Il Canada ha sciolto le batterie Honest John a metà degli anni 1970 senza sostituzione.
  • Danimarca Esercito reale danese
  • Francia Esercito francese
  • Germania Esercito tedesco
  • Grecia Esercito ellenico
  • Italia Esercito italiano
  • Corea del Sud Esercito della Repubblica di Corea
  • Norvegia Esercito norvegese (1961-1965)
  • Olanda Esercito reale olandese
  • Taiwan Esercito della Repubblica Cinese
  • Turchia Esercito turco
  • Regno Unito Esercito britannico
  • stati Uniti Esercito degli Stati Uniti - Corpo della Marina degli Stati Uniti.

ENGLISH

The MGR-1 Honest John rocket was the first nuclear-capable surface-to-surface rocket in the United States arsenal.  Originally designated Artillery Rocket XM31, the first unit was tested on 29 June 1951, with the first production rounds delivered in January 1953. Its designation was changed to M31 in September 1953. The first Army units received their rockets by year's end and Honest John battalions were deployed in Europe in early 1954. Alternatively, the rocket was capable of carrying an ordinary high-explosive warhead weighing 1,500 pounds (680 kg).

History and development

Developed at Redstone Arsenal, Alabama, the Honest John was a large but simple fin-stabilized, unguided artillery rocket weighing 5,820 pounds (2,640 kg) in its initial M31 nuclear-armed version. Mounted on the back of a truck, the rocket was aimed in much the same way as a cannon and then fired up an elevated ramp, igniting four small spin rockets as it cleared the end of the ramp. The M31 had a range of 15.4 miles (24.8 km) with a 20 kiloton nuclear warhead and was also capable of carrying a 1,500-pound (680 kg) conventional warhead.
The M31 system included a truck-mounted, unguided, solid-fueled rocket transported in three separate parts. The Honest John was assembled in the field before launch, mounted on an M289 launcher, and aimed and fired in about 5 minutes. The rocket was originally outfitted with a W7 nuclear warhead, with a variable yield of up to 20 kilotons of TNT (84 TJ); in 1959, a W31 warhead with three variants was deployed with yields of 2, 10 or 30 kt (8.4, 41.8 or 125.5 TJ). There was a W31 variant of 20 kt (84 TJ) used exclusively for the Nike Hercules anti-aircraft system. The M31 had a range between 3.4 and 15.4 mi (5.5 and 24.8 km).
Early tests exhibited more scatter on target than was acceptable when carrying conventional payloads. Development of an upgraded Honest John, M50, was undertaken to improve accuracy and extend range. The size of the fins was greatly reduced to eliminate weathercocking. Increased spin was applied to restore the positive stability margin that was lost when fin size was reduced. The improved M50, with the smaller fins and more "rifling", had a maximum range of 30+ miles with a scatter on target of only 250 yards (230 m), demonstrating an accuracy approaching that of tube artillery. The Honest John was manufactured by the Douglas Aircraft Company of Santa Monica, California.
In the 1960s, sarin nerve gas cluster munitions were also available, designed to be interchangeable for use with either the Honest John or MGM-5 Corporal. Initially the M79 (E19R1) GB cluster warhead, containing 356 M134 (E130R1) bomblets for the M31A1C Honest John. The production model was the M190 (E19R2) GB cluster warhead, containing 356 M139 (E130R2) bomblets when the M31A1C was phased out in favor of the XM50 Honest John. Under nominal conditions it had an mean area of effect of 0.9 square kilometers.

Variants

The two basic versions of Honest John were:
  • MGR-1A (M31) was 27 ft 3 in (8.30 m) long, had an engine diameter of 22 
7⁄8 in (580 mm), a warhead diameter of 30 in (760 mm), a fin span of 9 ft 1 in (2.77 m), weighed 5,820 lb (2,640 kg) (nuclear), and had a range of 3.4–15.4 mi (5.5–24.8 km). The Hercules Powder Company M6 solid-fueled rocket motor was 16 feet 5 
7⁄16 inches (5.015 m) long, weighed 3,937 pounds (1,786 kg), and had 99,000 lbf (441 kN) thrust.
  • MGR-1B (M50) was 26 ft 0 in (7.92 m) long, had an engine diameter of 22.8 inches (580 mm), a warhead diameter of 30 inches (760 mm), a fin span of 4 ft 6 in (1.37 m), weighed 4,320 lb (1,960 kg) (nuclear), and had a maximum range of 30 mi (48 km), practically twice that of the M31. An improved propellant formulation gave the rocket motor 150,000 lbf (666 kN) thrust.

Production and deployment

Production of the MGR-1 variants finished in 1965, with a total production run of more than 7,000 rockets. The Honest John's bulbous nose and distinctive truck-mounted launch ramp made it an easily recognized symbol of the Cold War at army bases worldwide and National Guard armories in the U.S.. Even though it was unguided and the first U.S. nuclear ballistic missile, it had a longer service life than all other U.S. ballistic missiles except the Minuteman system. The system was replaced with the MGM-52 Lance missile in 1973, but was deployed with the National Guard units in the United States as late as 1983. Conventionally armed Honest Johns remained in the arsenals of Greece, Turkey and South Korea until at least the late 1990s.
By the time the last Honest Johns were withdrawn from Europe in the late 1980s (and replaced by the unguided M-26 artillery rocket), the rocket had served with the military forces of Belgium, Britain, Canada, Denmark (non-nuclear), France, Germany, Greece, Italy, the Netherlands, Norway (non-nuclear), South Korea, Taiwan (non-nuclear), and Turkey.

Name origin

In late 1950, Major General Holger Toftoy was a colonel overseeing the development of the rocket. The project was in danger of cancellation "on the grounds that such a large unguided rocket could not possibly have had the accuracy to justify further funds." On a trip to White Sands Missile Range, Toftoy met a Texan man who was prone to making unbelievable statements. Whenever anyone expressed doubt about the man's claims, he would respond, "Why, around these parts, I'm called 'Honest John!'" Because the project was being questioned, Toftoy felt that the nickname was appropriate for the rocket and suggested the name to his superiors.

Support vehicles

Vehicles used with the Honest John platform:
  • M33 trailer, launcher,
  • M46 truck, heating and tie down unit (G744)
  • M289 truck, rocket launcher, (M139 truck) (G744),
  • M329 trailer, rocket transporter, (G821)
  • M386 Truck, Rocket, 762mm, short launch rail, 5-ton (M139 truck)
  • M405 handling unit, trailer mounted,
  • M465 cart assembly, transport, 762mm rocket.

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