BPCs

Je ne résiste pas à vous faire part des suppositions du Blog Arès : "Dyson's Bladeless Fan - A VTOL Potential? Posted by Bill Sweetman at 10/15/2009 8:46 AM CDT Aerodynamic and robotic technology keep the floors clean around Ares HQ. An iRobot Roomba (named Roswell because it is disk-shaped and uses alien technology) works the hard floors. Stairs and crevices are assigned to a Dyson, which as any fool knows works on the same principle as an inlet particle separator on a helicopter engine. Inventor James Dyson has just popped out his latest innovation in time for Christmas - a bladeless table fan. It looks mysterious, but as patent drawings show, it's quite simple: an impeller in the base draws in air, accelerates it and exhausts it through a slot in a short aerodynamic duct. The Coanda effect (which causes water to flow down the side of a wineglass rather than vertically downward) causes the high-speed flow to stick to the inside of the duct, and friction drags or entrains a bigger mass of air through the middle. The result is a high-mass, smooth, low-velocity flow. However, that's also what a turbine-powered helicopter does: turn a high-speed, low-volume exhaust into a slower, larger moving air mass to provide thrust at low speed. But it takes a lot of gears and shafts to do it. Is there any reason in principle why a Dyson fan couldn't lift a vehicle? It combines two effects which have been used in aviation before, but never together. The Coanda effect was used on the Avrocar VZ-9 flying saucer and the Boeing YC-14. Ejector lift-augmentation has an unbroken history of epic fail since it was first tried on the Lockheed XV-4A in the 1960s.. and the XVF-12A in the 1970s But the thrust augmentation system in the Dyson fan looks much cleaner - and if you tilt the fan you'd have a ring-wing, or in the case of a UAV the entire vehicle could be built into and around the wing. Does it make sense? Or at least, as much sense as a $300 table fan?

Non mais un bpc fait 25% de la charge de travail et permettrait de laisser ouvert les ateliers de découpe. Par contre un seul de plus ne permettrait que de les maintenir ouvert vers la Mi 2010 : donc soit STX récupère des commandes de paquebots soit on commande le BPC 4 après le BPC russe.. Mais à trop faire des avances de programmes, on est amené à ponctionner sur ce qui pourrait servir au PA2 comme le dit philippe. Peut-être qu'autour de 2010 on saura où l'on en est des avancées de la RGPP et des gains dégagés, de même que de la conjoncture financière pour savoir si l'on se lancera dans un PA2 ou pas (ces décisions sont souvent actées bien en amont de la décision publique : souvenons nous de ce que rapportait Tapir pour le précédent PA2 où DCNS savait pertinemment qu'il ne passerait pas)

La fin du cauchemard du au missile sea-skimming et autre super étendard volant au ras des flots, en absence d'AEW aimerait-on dire. Pourtant ce n'est pas mis en avant dans l'article : taille et poids du radar ?

Et les MPV du CNIM, la même chose et en plus par temps pourri: c'est ça le vrai Progrès !

Ba, avec un bon radar et de bons missiles, le F-5 pourrait suffire encore pour quelques années... Ce d'autant qu'avant que la Suisse soit assiégée par des hordes de chars rouges ou des nuées de soldats Jaunes il faudra quelques années encore : Vous avez encore le temps pour acheter le nec plus ultra qui boutera l'envahisseur jusque dans ses montagnes... :

Il y a des rétrofit "moderne" des tiger (en dehors du tigershark...) ??? ? j'ai trouvé : "Elbit Systems F-5 upgrade turns the "Tiger" into a powerful tactical fighter armed with next-generation operational features that equal and even exceed those of today's most advanced combat aircraft. The F-5 upgrade reduces pilot workload while dramatically increasing performance capabilities. " ou dans wikipedia : "Upgrades Various F-5 versions remain in service with many nations. Singapore has approximately 49 modernized and re-designated F-5S (single-seat) and F-5T (two-seat) aircraft. Upgrades include new FIAR Grifo-F X-band radar from Galileo Avionica (similar in performance to the AN/APG-69), updated cockpits with multi-function displays, and compatibility with the AIM-120 AMRAAM and RAFAEL Python air-to-air missiles.[5][6] Thai F-5T Tigris upgrade with new avionics and DASH helmet Similar programs have been carried out in Chile and Brazil with the help of Elbit. The Chilean upgrade, called the F-5 Plus, incorporated a new Elta 2032 radar and other improvements. The Brazilian program, whose product is called the F-5M (Modernized), is armed with Python V coupled to the DASH helmet-mounted cue system, and new GRIFO radar, cockpit displays and navigation electronics. The Brazilian F-5M is also equipped with the Israeli Derby missile and can operate in a BVR environment. In the Cruzex 2006 multinational war games, a Brazilian F-5 made simulated kills on two French Air Force Dassault Mirage 2000N aircraft, which were supported by an E-3 Sentry and escorted by other two Mirage 2000C. This result was achieved by using the Derby and the information relayed by datalink from an AEW&C plane, the Embraer R-99, fitted with the Erieye AESA radar.[7] NASA F-5E modified for DARPA sonic boom tests Other upgrade programs have been carried out in Royal Thai Air Force by Israel being called the F-5T Tigris, armed with Python III and 4 (with the Dash helmet-mounted cueing system). Unlike other F-5s which have undergone updates, the RTAF aircraft cannot use BVR missiles."

14/10/09 SOURCE:Flight International Eurojet proposes thrust-vectoring upgrade for Typhoon By Andrew Doyle http://www.flightglobal.com/articles/2009/10/14/333449/eurojet-proposes-thrust-vectoring-upgrade-for-typhoon.html

Flight International Dutch agree 'interim' solution for delayed naval NH90s By Anno Gravemaker NH Industries has offered an interim solution to the Netherlands after the country was hit by fresh delays to deliveries of its NH90 Naval Frigate Helicopters. Initial helicopters will now be delivered in a "meaningful operational configuration" under an agreement brokered between the manufacturer and Dutch undersecretary of defence Jack de Vries. The Netherlands intends to deploy its NH90 NFHs as replacements for its ageing Westland Lynxs, but the type has been by problems with its radar system and is overweight. Under the new plan, seven NH90s will take over land-based Lynx operations from March 2010, but the latter will continue to be used as a frigate-based helicopter for a further two years. The first NH90 with full operational capability is due to be handed over in March 2011, and the initial seven helicopters will subsequently be returned to the manufacturer to be upgraded to this standard.

Flight International US Army starts analysing options for OH-58D replacement By Stephen Trimble After cancelling the Bell Helicopter ARH-70 Arapaho a year ago, the US Army is now formally analysing a wide range of options for replacing the Bell OH-58D Kiowa Warrior. An EADS North America/Lockheed Martin team and Boeing plan to propose prototypes based on the Armed Scout 645 and AH-6S, respectively. Meanwhile, Bell could propose making significant power upgrades to the single-engined OH-58D or offer a militarised version of the twin-engined 429. The army has not decided the final requirements for the new helicopter, which could include a significant unmanned component. But a request for information issued in November 2008 set a difficult standard - the ability to fly for up to 3h carrying a 1,040kg (2,300lb) payload up to 6,000ft (1,830m) in 35°C (95°F) temperatures. Not a single manufacturer could respond with an aircraft that met the requirement in January, but the competition has since energised them. The EADS team in July flew an adapted EC145, the baseline for the AS645, with 1,040kg payload up to 6,000ft in Colorado. The team has since demonstrated the ability to load five UH-72A light utility helicopters in a Boeing C-17, which EADS believes could be a transportability requirement to win the armed aerial scout (AAS) contract. The C-17 loading required removing the rotor blades and some exterior equipment, but no maintenance check flight would be needed after unloading, says Gary Bishop, vice-president and programme manager for the armed aerial scout. In December, Boeing also plans to demonstrate that a prototype version of the AH-6S can meet the army's performance criteria for endurance, payload and range, says Al Winn, Boeing vice-president. Boeing plans to demonstrate a more powerful AH-6S with a new rotor blade, and a 12% thrust increase for the Rolls-Royce C30R/3M engine. Finally, Bell is considering proposing major upgrades for the OH-58D, including propulsion, drive train and an updated glass cockpit, says Rich Linhart, a vice-president for military business development. The army plans to make the OH-58 safe and relevant up to 2020 by replacing obsolescent parts and making major airframe changes, such as transferring the sensor for the rotor mast to the chin. But one option for AAS includes extending the OH-58D fleet through 2030, Linhart says. If the army decides to pursue that strategy, Bell must retain the ability to manufacture cabins to replace airframes lost to combat or wear and tear, Linhart says.

Mais qui pourrait tout de même évoluer plus vite qu'en 16 ans... 8) Surtout que l'interarme est beaucoup plus effectif au niveau opérationnel : on a pu voir une collaboration au large du liban entre les senseurs fournis par la FAA et les postes de tir de Missiles à terre. De plus la bidouille opérationnelle existe, exemple : les nacelles de ravitaillement en vol des SuE ou l'adaptation en bombardier de "Maman Jaguar" comme les Africains surnommaient les Atlantic 1 , avec un emport de 15 bombes donc largement le record toute catégorie de l'aviation française du moment. Tout cela complètement non officiel puisque la Royale ne voulait pas entendre parler à l'époque d'une utilisation terrienne de ses chers et trop rares Atlantique Toutefois je me dis que ce projet positionné en 2025 est surtout un moyen d'envisager le futur, en sachant que le court terme est chargé avec la rénovation des Panther, l'entrée en MSO d'un nombre suffisant de Tigre, leur rétrofittage en HAD qui n'est pas acquise techniquement... Bref si il faut en plus envisager la rénovation d'emblée des Tigres, cela devient ubuesque... surtout dans un contexte budgétaire où tout est compté. Bref une étude utile permettant d'avoir une idée des possibles Et probablement un coup d'accélérateur partiel de certaines composantes en fonction de l'évolution des besoins du moment et des Retex : Y a qu'à voir l'achat sur étagère de Reaper, l'intégration du Rover ou pour ce qui est du découpage d'une étude, ce qui était envisagé initialement comme retrofit des 2000 D à près de 1200 m€ et les 700 m€ du projet final, (selon le HS de DSI spécial bourget)

N'y aurait-il pas plutôt une piste en fonction de l'évolution du projet de jet supersonic drivé par Dassault si jamais il était mis en production, en dériver une version Bombardier serait moins couteuse qu'un projet autonome de bombardier stratégique : http://www.hisacproject.com

Pas d'accord: On a réussi à adapter très vite le tir des rafales en standoff à partir des coordonnées fournies par le Sperwer : il n'y a pas une différence majeure avec un dauphin tirant un ANL voire sa version terrestre, un LMM ou un Tigre tirant un hellfire. Ce serait beaucoup plus logique d'utiliser un drone que d'envoyer un hélico de reconnaissance non blindé avec ses pilotes pour le faire. Bref cela semblerait hallucinant de devoir attendre 2025 si il y a une nécessité d'opération. Du fait de cette nécessité, cela devrait apparaître plus vite. Mais TIMOSAR ne pourrait-il pas être plus large : 2025 est l'époque où les dernières versions de l'Apache pourraient recevoir un rotor actif avant l'apparition d'hélico de combat hybrides

Apparemment ce serait plutôt Boeing qu'il faudrait remplacer...

CE QUI ME FRAPPE DANS CETTE ETUDE : C'EST UNE FOIS DE PLUS LE GAP entre des israeliens qui ont utilisé des liaisons de données drone-hélico en 2006 à Gaza et cette étude qui aboutira en 2025... Comme le dit Laverdure (pseudo sur ce site...) on n'aura pas une guerre d'avance... Or on voit déjà une liaison drone Sperwer-Rafale en A-Stan donc on sait faire Ensuite des sperwer MkII avec son atterrissage sur airbag et parachute serait compatible avec un BPC Enfin le missile ANL et son dérivé terrestre aura une portée de presque 50 km. Bref on a tous les acteurs nécessaires, mais il faudra pourtant attendre les calendes grecques... :'(

Le drone de mes rêves pour mes fremm et autres FREDA :P Boeing A160T Unmanned Helicopter Flies With Foliage-Penetrating Radar in DARPA Tests http://defpro.com/news/details/10494/ 17:56 GMT, October 13, 2009 IRVINE, Calif. | The Boeing [NYSE: BA] A160T Hummingbird unmanned helicopter successfully completed 20 test flights from Aug. 31 to Oct. 8 with the Foliage Penetration Reconnaissance, Surveillance, Tracking and Engagement Radar (FORESTER). The tests, conducted at Fort Stewart, Ga., validated the radar-carrying A160T's flight characteristics with more than 50 hours of flying time. FORESTER is being developed by the Defense Advanced Research Projects Agency (DARPA) and the U.S. Army to provide enhanced coverage of moving vehicles and dismounted troops under foliage, filling the current surveillance gap. The Fort Stewart tests were conducted under a contract with DARPA. "The success of these test flights points to the operational readiness of this important capability," said Vic Sweberg, director of Unmanned Airborne Systems (UAS) for Boeing. "The FORESTER is a unique radar, and the A160T is a unique helicopter. Together, they make a formidable system." The 53 flight hours at Fort Stewart pushed the total flight hours for the A160T past the 220-hour mark. The helicopter's longest flight at Fort Stewart was 5.8 hours and its average flight time was 4.2 hours. The A160T is a turbine-powered unmanned helicopter that can perform numerous missions, including intelligence, surveillance and reconnaissance, communications, and precision resupply. It holds the world record for endurance for its class (more than 18 hours unrefueled), can hover at 20,000 feet and can carry up to 2,500 pounds of cargo. The Hummingbird recently was selected to participate in the U.S. Marine Corps Warfighting Laboratory's Immediate Cargo Unmanned Aerial System Demonstration Program. Boeing will demonstrate that the A160T can deliver at least 2,500 pounds of cargo from one simulated forward-operating base to another in fewer than six hours per day for three consecutive days.

l'EGEABLOG donnait son classement par rapport aux autres blogs. De même, a-t-on idée du positionnement d'AD-NET par rapport aux autres fora ?

TRop tard : j'avais posté 10 minutes plus tôt :lol:

QinetiQ's PACSCAT landing craft technology demonstrator takes to the water http://defpro.com/news/details/10440/ 08:36 GMT, October 12, 2009 The PACSCAT (Partial Air Cushion Supported CATamaran) Innovative Solution Demonstrator Craft (ISDC) has just entered the water for the first time at the Hythe Marine Park, near Southampton and will shortly commence rigorous sea trials. QinetiQ was awarded the contract to manage the design and build of the vessel and then conduct a series of evaluation trials in September 2007. The high speed, all aluminium PACSCAT ISDC vessel is 30m long, 7.7m in the beam, has a design vehicle payload of 55 tonnes and an approximate loaded weight of 175 tonnes. It is propelled by twin waterjets, driven by MTU Diesel engines and is designed to test at full scale the hydrodynamics of the PACSCAT hullform and to investigate its feasibility to deliver significantly faster speeds than traditional landing craft. The vessel makes use of the PACSCAT concept originated by John Lewthwaite of Independent Maritime Assessment Associates Ltd. The original fast landing craft design requirement was to accommodate up to five Viking armoured fighting vehicles. It is intended to off-load front line vehicles and troops from Royal Navy amphibious ships to the beach and is in response to the MOD’s requirement to launch rapid and effective amphibious operations from over the horizon. QinetiQ was contracted by the MOD’s Research Acquisition Organisation, (now the Defence Technology Innovation Centre) to manage the procurement of the demonstrator vessel, act as the design authority and to manage the all important safety process and trials programme. QinetiQ then invited competitive bids from companies in the shipbuilding sector, to bring a broad mix of experience to the project. Griffon Hoverwork Ltd, the world leaders in hovercraft construction, lead the construction team and are also fitting out the vessel. They joined with Aluminium Shipbuilders Ltd for the hull construction; BMT Nigel Gee Ltd provided the detailed design; and BMT Marine Projects Ltd undertook project management support for Griffon Hoverwork Ltd. “The PACSCAT concept is a leading contender to meet the MOD’s fast landing craft requirement. It will be capable of performing a variety of roles, where high speed and high payload capacity are required and has exceptional beaching qualities because of its low and variable draught,” explained Iain Kennedy, practice leader for QinetiQ’s Maritime Platforms Consultancy business. “The industry partners are all working well together and the trials of the full-sized PACSCAT ISDC that start later this year will determine the performance of the PACSCAT hullform at full scale and the relevant operational capability. We will then provide comprehensive recommendations for design optimisation to inform the Fast Landing Craft IPT’s requirements engineering and procurement process.” Trials already conducted include 1/15th scale model tests in QinetiQ testing tanks at Haslar and a 1/3rd scale manned model that show enhanced performance over the current in-service capability, with exceptional performance during beaching noted during the manned model trials. Background on other industry partners The Royal Marines’ existing hovercraft were built by Griffon Hoverwork and they produced amphibious hovercraft for both commercial and military operations. Other recent customers include the RNLI and the Royal Swedish Navy. Aluminium Shipbuilders has built many lightweight marine aluminium structures including the 50m Condor 9 catamaran vessel and over 80 hovercraft hulls. BMT Nigel Gee has designed high speed marine vessels including catamarans and sidewall hovercraft for many worldwide civil and military customers. BMT Marine Projects specialises in project management and has recently been involved in large MOD trials programmes. Griffon Hoverwork, BMT Nigel Gee and Aluminium Shipbuilders have all previously worked together as a team; supplying Fleet tenders to the MOD.

J'ai du manquer un épisode mais il me parraissait clair depuis le début qu'en cas d'achat de Gripen il y en aurait une trentaine, en cas de rafale une vingtaine et en cas de typhoon une dizaine ?

Un effet d'opportunité : l'arrivée de la torpille Mais parmi les unités construites seuls 2 sous marins et de toute façon à cette époque encore des réticences à ces guerres immorales menées par des sous marins qui coulent sans sommation qui empêchera d'ailleurs les Allemands d'exploiter à fond leur avantage pdt la WWI. par certains côtés ses Torpilleurs bas sur l'eau, furtifs, me font penser aux essais de petits navires stealth suédois ou chinois : Avec comme pour la Jeune école l'utilisation de 2 dimensions : le seaskimming étant assimilable à de la 2D quasiment...

J'aime mieux un échéancier de paiement réaliste que le "cout lissé sur trente ans" que tu postes régulièrement ;) Si on le décidait en 2012, cela voudrait dire que les "grosses traites" arriveraient pour 2014, donc à un moment où la bosse n'est pas encore passée. Combien avait il été prévu dans l'actuelle LPM qui court jusqu'en 2014 pour les études du PA2bis ? J'ai en tête 200 m mais je ne suis plus sur : auquel cas cela se glisserait presque dans cette enveloppe jusqu'en 2014. Par contre la commande anticipée du BPC3 enlève 417 m€ sur celle ci , quel sera le surcout du A400m, ET aussi en 2011 on termine de payer les M51 , mais à partir de quand paye t on les tête TNO ? Et puis il faut financer Scorpion, l'ATBM, le successeur du Neuron... Bref : A t on un tableau excel prévisionnel pour la LPM 2015-2020 où on insèrerait les traites du pa2 ?

GA avait d'abord eu le projet d'une version maritime, le mariner, tant pour concourir avec le global hawk que pour fournir une version embarquable avec ailes repliables...mais qui n'a pas abouti. Plus récemment il a été envisagé de baser des reaper sur pont plat tout laissant le controle aux usa. Avec le soft d'appontage automatique testé sur F-18, cela devient envisageable

Le "TOUT" est vraiment excessif : pas de stall speed , pas de take off run ni de distance d'atterissage ! Comment je vais faire pour savoir si je peux le mettre sur mon BPC, M'enfin ! :lol: :lol:

On pourrait brader aussi nos 2000 C... du pur intercepteur...juste lui mettre des missiles modernes...

Surtout que le Reaper est déjà une gamme de produits dépassés : Le développement a faire est plutôt sur un produit type Predator C qui est plus rapide, et Furtif (et accessoirement embarquable) Donc autant acheter des Predator B et mettre les sous dans le développement d'un UCAV type Neuron