Artillerie (Fixe)

Citation :

M777 155mm Ultralightweight Field Howitzer, United Kingdom


GENERAL REQUIREMENTS:
Weight: 10,500 lbs or less
Range: 30-40 km (assisted), 22.5-30 km (unassisted)
Range Precision PE: .35% (assisted), .30% (unassisted) of range
Deflection Precision PE: 1 mil (low angle), 2 mils (high angle)
Accuracy: 200-50 meters CEP, at 25 km w/ 20 km Met separation.
Minimum Range: 3.7-2.7 km high angle
Maximum Rate of Fire: 5-8 rds/min for NLT 2 minutes
Min Elevation: 0 mils or less (300 mils for charge M119A2/M203A1)
Maximum Elevation: At least 1275 mils
Sustained Rate Of Fire: At least 2 rds/min
Emplacement Time: 3-2 minutes w/ 5 crewmen (ready to fire)
Displacement Time: 2-1 minute w/ 5 crewmen
Out Of Sector: 3200 mils left/right in 3-2 minutes w/ 5 crewmen
Chamber Temp: Sensor for misfire proc. and ROF limitations
External Lift: CH-53E & CH-47D @ high/hot (4000 ft/95oF); MV-22 & CH-53D @ low/cool (Sea Level/60oF)
Strategic Lift: 2 in C-130; LW155 w/ PM C-141B, and larger
Heavy Drop: Yes (LVAD) from C-130 and larger
Ground Mobility: NTE towing capabilities of PM; equiv. fording
Prime Mover: USMC - MTVR, Army - FMTV 5 ton
Direct Fire PH: 30-80% @ 1500 meters
Moving Target Capability: Required w/ lead/night/poor visibility enhancement

The Ultralightweight Field Howitzer (UFH), designated M777 in the USA, was selected in 1997 by a joint US Army / Marine Corps initiative to replace the existing inventory of M198 155mm towed howitzers. The first of five EMD systems was delivered in June 2000. The US Marine Corps is to procure 380 systems and the US Army 273 systems. A low-rate initial production (LRIP) contract for 94 systems was awarded in November 2002.
Operational testing with the USMC, during which nearly 12,000 artillery rounds were fired by four production systems, was completed in December 2004. A contract for full-rate production of 495 systems was awarded to BAE Systems in April 2005. In May 2005, the USMC began fielding the M777 with the 11th Marines unit at Twentynine Palms in California.
The first 18 systems were delivered to the US Army's 2nd Battalion, 11th Field Artillery in Hawaii in October 2006
The M777 will be the artillery system for the Stryker Brigade Combat Teams (SBCT). The systems fitted with the digital fire control system are designated M777A1, and those with the software update which allows the firing of the Excalibur projectile, M777A2. M777A2 received full material release in July 2007, clearing the upgrade for fielding. All M777A1 systems will be upgraded to the A2 standard.
The M777 was deployed by the US Army and Marine Corps to Afghanistan in December 2007 and to Iraq in 2008.
The Excalibur projectile was first deployed in Afghanistan in March 2008.
By August 2008, over 400 systems had been delivered to the US Army and USMC.
In April 2008, BAE Systems received an order for an additional 87 M777 systems for the US Army and USMC. Deliveries are scheduled from 2010. In August 2008, a further 43 systems were ordered.
In December 2005, the first four of six M777 systems were supplied by the USMC to the Canadian Army, under a foreign military sales (FMS) contract. The systems were deployed to Afghanistan in February 2006. A further six systems have been ordered and are in service. In June 2008, Canada requested a further 25 systems, a total of 37.
In July 2008, Australia requested the foreign military sale of 57 M77 howitzers.
BAE Systems has developed a mobile version, the M777 Portee, which is mounted on a purpose-built 8x6 Supacat vehicle. The vehicle was first shown at Eurosatory in June 2006.
The M777 has been developed by BAE Systems Land Systems (RO Defence, formerly the Armaments Group of Vickers Shipbuilding and Engineering Ltd) at Barrow-in-Furness. United Defense LP of Pascagoula, Mississippi is responsible for final assembly, test and delivery of production systems for the US.
In July 2004, the M777 successfully completed a series of airlift tests with the US Marine Corps MV-22 Osprey tiltrotor aircraft. The M777 was carried as an external load for a distance of 69nm.
The M777 is normally operated by a crew of eight men but can be operated with a reduced detachment of five.
Design
The construction of the M777 makes extensive use of titanium and titanium castings, enabling a weight reduction of 3,175kg (7,000lb) compared to the M198 howitzer which it replaces in the US Army and USMC inventory. The titanium is supplied by RTI International metals of Niles, Ohio.
Armament
The M777 matches the firepower of current generation 155mm towed systems at less than half the weight. The Howitzer is equipped with a 39-calibre barrel. The muzzle velocity (at Charge 8 super) is 827m/s.
The maximum firing range is 24.7km with unassisted rounds and 30km with rocket-assisted rounds. The M777A2 will fire the Raytheon / Bofors XM982 Excalibur GPS / Inertial Navigation-guided extended-range 155mm projectiles using the Modular Artillery Charge Systems (MACS). Excalibur has a maximum range of 40km and accuracy of 10m.
First firing trials of the M777A1 with Excalibur took place in August 2003. First production rounds were delivered in September 2006. Excalibur successfully completed limited user test in March 2007. It was first fielded in Iraq in May 2007 and in Afghanistan in February 2008.
The M777 is able to deliver up to five rounds a minute under intense firing conditions and is able to provide a sustained rate of fire of two rounds a minute.
Fire control
The LRIP systems employ an optical sighting system for direct and indirect firing by day or night. Full production systems will be fitted with the General Dynamics Armament Systems Towed Artillery Digitisation (TAD) system. LRIP systems will be retrofitted with TAD.
The TAD digital fire control system provides onboard ballistic computation, navigation, pointing and self-location, providing greater accuracy and faster reaction times. The TAD system also includes a laser ignition system, electric drives for the howitzer's traverse and elevation and a powered projectile rammer.
Mobility
The M777 has a production weight of 3,745kg and can be transported by helicopter, transporter aircraft and ship. The howitzer can be towed by an air-braked 4x4 vehicle greater than 2.5t.
The hydrostrut suspension system is provided by Horstman Defence Systems of the UK. The maximum towed road speed is 88km per hour and the towed cross-country speed is 50km per hour. The load on the towing eye is rated at 60kg. The towing ground clearance is up to 660mm

army-technology

Citation :

Thales Scorpion a new mobile automated mortar weapons platform for African market.



At AAD 2012, Thales South Africa presents its new automated mortar weapons platform Scorpion mounted on a light tactical vehicle Toyota Land Cruiser 4x4 pickup chassis. The system is fully designed and developped by Thales Africa for the African Market.

Scorpion is an Automated Mortar and Fire Control System (AMFCS) designed to accommodate the requirements of mobile and Special Forces. The AMFCS is a vehicle-mounted mortar system. It is capable of autonomous engagement of targets (from the back of the vehicle) due to its sensors and mechanical installation.

The sensors are effectively in two areas, those that sense the position and orientation of the vehicle and those used to locate and fixate targets. Position sensing is by inertial means, supplemented with Global Positioning System (GPS) and distance information. Observation sensing is on a mounted pedestal, gives accurate angle measurements and is topped by an optical sensor with laser range finding.

Armyreco

Une question de bleu, c'est quoi le temps de deploiement d'un mortier 81mm ou 120mm, du debarquement au premier tir ?
J'ai lu ceci pour le scorpion de thales et ca m'a etonner un peu...

Citation :

The Scorpion is a self-contained direct and indirect automated mortar and rocket fire control system mounted on a palletised platform that can be fired from the back of a vehicle in less than 15 seconds from stopping versus 15 minutes with a conventional system.

Moins de 2 minutes pour mettre un mortier de 120mm en position de tir, et je suis gentil.



Les munitions suivent dans foulée, sans oublier d'avoir reçu et pris en compte au préalable les coordonnées de tir (ce qui vaut pour un RTF1 ou un Scorpion).

Merci Rafi, t'as une idee du temps de deploiement pour un mortier de 120 ou 81 demonter?
Tu connais les procedures pour le reglage de la sight unit? Ca prend du temps?

Merci d'avance.

tes questions sont louches VIP on forme pas des moujahidines ici

D'office, j'ai surement un M120 avec sight unit dans mon jardin au cas ou, je me fais d'ailleurs livrer les munitions direct de chez lockeed martin

Dans un registre plus serieux, j'essaie de m'expliquer le prix exorbitant du cardom, thales scorpion, expal eimos et autres systemes agraab par rapport a un simple M120 si le deployment time est quasi le meme comme le dit rafi, mais 60 fois plus important comme dans l'extrait de l'article sud-africain que j'ai poster.
http://www.defenceweb.co.za/index.php?option=com_content&view=article&id=9779:special-forces-want-scorpions-sting-&catid=55:SANDF&Itemid=108

De plus, ce matos peut concerner directement nos troupes au sud, pour preuve l'Espagne a commander 8 cardom pour l'astan, pour assurer la securite des colonnes de ses troupes.
http://www.globes.co.il/serveen/globes/docview.asp?did=1000693587&fid=1725
Si t'as suivi mon intervention dans le topic sur l'armee jordanienne, tu auras lu mes questions sur les possibilites de mettre un 81 ou 120mm sur un 4*4.

Enfin, un type qui est capable de trouver un M120 avec munitions et sight unit, n'a pas besoin de far-maroc pour savoir comment s'en servir.
Tu sais toi-meme qu'il y a plein de sites ou des soldats US,UK donnent des retex et explique leur deploiement, alors famas essaie pas d'etre plus catholique que le pape en voulant stopper une info que les armees n'interdisent pas a leurs soldats de divulguer.

Mais tu confirmes famas ce que je savais deja.

ps: je vois pas le lien entre le deployment/ sight unit adjusting time et les moujahidin.
http://www.globalsecurity.org/military/library/policy/army/fm/23-90/ch7.htm

Si tu veux, ceci etant dit, quelqu'un peut il repondre a ma question maintenant ?
Temps de deploiement d'un mortier de 120mm ?
Utilite de ce genre d'armes pour colonnes de soft vehicules en deplacement ?
Le prix d'un systeme genre cardom/expal/scorpion sur vamtac/humvee est il meriter par rapport a un 120mm embarque a l'arriere a la jordanienne ? j'ai un ratio allant de 5 a 10.

pour les prix, je me base sur ces sources :

http://www.fas.org/man/dod-101/sys/land/m121.htm
http://www.armyrecognition.com/october_2011_news_defense_army_military_industry/elbit_systems_won_contract_to_supply_cardom_81_mm_autonomous_recoil_mortar_for_spanish_army_3110113.html
http://www.defenceweb.co.za/index.php?option=com_content&view=article&id=9779:special-forces-want-scorpions-sting-&catid=55:SANDF&Itemid=108

merci d'avance.

la portée d'un mortier ça ne dépasse pas 3km l'utilité tactique est la lutte anti-infanterie, comme disent les artilleurs deux obus ne tombent jamais dans le même lieu c'est parfait pour disperser une concentration ennemi . on a déjà des mortiers 120mm SP montés sur VAB pour appui des fantassins

FAMAS a écrit:

la portée d'un mortier ça ne dépasse pas 3km l'utilité tactique est la lutte anti-infanterie, comme disent les artilleurs deux obus ne tombent jamais dans le même lieu c'est parfait pour disperser une concentration ennemi . on a déjà des mortiers 120mm SP montés sur VAB pour appui des fantassins

merci pour ta reponse. Juste une petite autre question pour la route, je lis partout que la portee du M120 ou du Mortier 120mm Rayé Tracté Modèle F1 est de 7-8km.
Tu m'as dit que ca depasse pas 3km, d'ou vient la difference ? C'est la portee reelle ?

La charge de propulsion d'un obus de 120MM est plus importante que celle d'un obus de 81MM, donc forcément plus le calibre est important et plus la munition va loin.

Younes a écrit:

La charge de propulsion d'un obus de 120MM est plus importante que celle d'un obus de 81MM, donc forcément plus le calibre est important et plus la munition va loin.

wiki donne le M252 81 mm a +-6km de portee effective, le double des 3km ???

le field manual mortars de l´US army,y´a tout ce qu´on cherche dedans

http://armypubs.army.mil/doctrine/DR_pubs/DR_a/pdf/fm3_22x90.pdf

Merci je vais pouvoir faire un carnage
Non serieux, en parcourant vite fait, ils ont les memes portees que sur wiki et l'assembly+ sight unit adjusting time est bien inferieur au 15 minutes de l'article sudaf.
Mais bon le cardom sur vamtac ou m120 sur vab a l'air bien pour les colonnes de vehicules.

vipsdesvips a écrit:

FAMAS a écrit:

la portée d'un mortier ça ne dépasse pas 3km l'utilité tactique est la lutte anti-infanterie, comme disent les artilleurs deux obus ne tombent jamais dans le même lieu c'est parfait pour disperser une concentration ennemi . on a déjà des mortiers 120mm SP montés sur VAB pour appui des fantassins

merci pour ta reponse. Juste une petite autre question pour la route, je lis partout que la portee du M120 ou du Mortier 120mm Rayé Tracté Modèle F1 est de 7-8km.
Tu m'as dit que ca depasse pas 3km, d'ou vient la difference ? C'est la portee reelle ?

plus la portée augmente plus la CEP s'aggrave, frapper à 8km d'accord mais pour quelle CEP ?....

okidoki, ca peut te paraitre trivial, mais j'avais bien marquer "question de bleu".
Je vais me pencher now sur la CEP des mortiers.
"Firepower-artilery strike" m'a donner gout a l'arty...

firepower est une belle serie qu´il faut compter dans ses docs militaires vus
(HS tant que ca t´ouvre l´appetit,regarde l´episode Wild Weasel /HS)

c est le même truc que les francais ont trouvé chez les sandalots du Mali ... ca prouve qu il y a cooperation et echange de savoir faire .

Systeme d'Artillerie ATHOS, 155 MM, chargeur automatique, Magasin de 3 Obus... un bijou technologique