maximo escribió:Viniendo del funeral de los niños y la manifestacion en contra del imperialismo asesinaniños de EEUU, me he puesto a pensar en que querrian decir con aquello de "ataques quirurgicos"
Cita:
Perdon... aqui creo que me he perdido algo porque no entiendo.
Los radares AESA bloquean la guia radarica de los misiles enemigos?
No. Pueden hacerlo, que es muy diferente. O sea, que algunos modelos muy concretos de radares AESA, de los que son muy complicados y muy caros, en el futuro, cuando se solucionen algunas cosas, podrian llegar a hacerlo. No es que un AESA por derecho de sangre pueda bloquear la guia radarica.
AESA radars have a number of additional advantages, some of which are being publicized as time goes on. In addition to having no moving parts that serve as sources of failure, AESA radars’ inherent redundancy allows them to fly and perform well even if some of the individual modules need replacing. They also have the potential to perform offensive electronic warfare functions, high-bandwidth communications, and probably a few more capabilities that the government prefers not to talk about yet.
maximo escribió:Si, tan solo se te olvida mencionar que el gasto bruto en los presupuestos no han sido para programas de nuevos sistemas, sino por un para de "pequeños detalles" llamados Afganistan e Iraq.
maximo escribió:La economía americana, más allá de los anuncios del armagedón, es estructuralmente sana.
Y es mucho mejor que todos sigamos creyendo eso.
Antiguamente, la Guerra Electrónica se dividía en Contramedidas Electrónicas (ECM), Medidas de Apoyo Electrónico (ESM) y Medidas de Protección Electrónica (EPM, que no tiene nada que ver con pulsos electromagnéticos nucleares; hace incluso más tiempo, a éstas mismas medidas se las denomimaba ECCM o Contra Contramedidas Electrónicas). Desde hace ya algunos años, la Fuerza Aérea norteamericana abandonó dichas denominaciones y pasó a denominarlas EA, ES y EP. Las dos últimas hacen referencia a las anteriores, pero eliminando lo de Measures de ambas; en cuanto a las ECM, se las ha cambiado por entero de denominación para añadir, aparte de las ya existentes, las DEW o Directed Energy Weapons como serían los láser de alta energía (HEL, High Energy Laser), las microondas de alta potencia (HPM, High Power Microwaves) y otras armas aún más futuristas, como los haces de partículas, que suena aún más en plan Star Wars.
El JSF dispondrá, gracias a su avanzado AESA, de capacidad de EA en las bandas en las que trabaja dicho radar, el APG-81. De acuerdo con el constructor, el radar podrá hacer todo esto:
alex atella escribió:maximo escribió:Si, tan solo se te olvida mencionar que el gasto bruto en los presupuestos no han sido para programas de nuevos sistemas, sino por un para de "pequeños detalles" llamados Afganistan e Iraq.
Esto no es cierto.
Si tomas la tasa de inversión en I+D americana es de 2.7% del PIB. La española de 1.18 si mal no recuerdo. La rusa de 1.03. Los chinos, con una inversión creciente es de 1.44.
Quiere decir que una sola bomba se carga al edificio y a la guardería al primer intento. Antes, en los tiempos del CCIP, te tenías que cargar una cuadra entera en cada dirección. Y antes, cuando la Norden, tres manzanas enteras.
No se trata de creer. (sobre la economia americana)
maximo escribió:Quiero decir que ese avion no es capaz de realizar misiones quirurgicas como puede hacer hasta un Tejas. O sea, lanzar una bomba guiada laser de pequeño tamaño, volar el edificio y dejar la guarderia intacta.
Ismael escribió:La española es 1,3%, please (http://www.battelle.org/aboutus/rd/2011.pdf)
Por cierto, la japonesa es 3,3%: una cosa es la inversión en I+D de un país y otra el porcentaje de sus presupuestos de defensa que se dedica a la adquisición de nuevos sistemas.
Un saludo
Limitations keep F-22 from use in Libya ops
By Dave Majumdar - Staff writer
Posted : Tuesday Mar 22, 2011 18:23:15 EDT
One aircraft conspicuous by its absence over the skies of Libya is the Air Force’s vaunted F-22 Raptor air dominance fighter. The Lockheed Martin-built jet was likely benched due to its inability to communicate with other coalition aircraft and its limited ability to hit ground targets, analysts said.
“The designers of the F-22 had a dilemma, which is whether to have the connectivity that would allow versatility or to have the radio silence that would facilitate stealthiness. What they opted for was a limited set of tactical data links,” said Loren Thompson, an analyst and chief operating office at the Lexington Institute, Arlington Va. The F-22 can only connect with other F-22s via an intraflight data link, and can only receive, but not transmit, over the standard Link-16 data link found on most allied aircraft.
Radio emissions from various data links could potentially give away the aircraft’s position, Thompson said. As such, while the Raptor is the stealthiest operational aircraft in the world, it lacks much of the connectivity found on other warplanes, he said.
The aircraft also lacks a significant air-to-surface punch. Currently, the F-22 can only use two 1,000-pound Joint Direct Attack Munitions, which are GPS-guided bombs, against fixed targets. It does not yet have the ability to carry the 250-pound Small Diameter Bomb (SDB) or to create synthetic aperture radar maps, which are black and white photo-quality images of the Earth’s surface, needed to select its own ground targets. By contrast, an F-15E Strike Eagle can carry 24,000 pounds of ordnance.
Those capabilities will be available once the Increment 3.1 hardware and software upgrade is fielded into the operational Raptor fleet later this year. However, even with Increment 3.1 installed, the F-22 will only be able to designate two targets in total for the eight SDBs it would be able to carry. The operational test force has been putting Increment 3.1 through its paces at Nellis AFB, Nev., since November.
However, the addition of Increment 3.1 will not resolve the Raptor’s basic inability to connect with other aircraft, nor has the Air Force articulated a clear plan for the F-22 to do so. A future upgrade called Increment 3.2 was to have included the Multifunction Advanced Data-link (MADL) found on the F-35 Joint Strike Fighter, however, the Air Force deleted funding for that data link last year.
The MADL is also planned for integration into the B-2, which would have enabled the entire Air Force stealth aircraft fleet to be connected during operations inside hostile airspace. Further, it is only with the addition of Increment 3.2 that the Raptor would be able to independently retarget eight SDBs at eight separate targets.
Under the Air Force’s global strike task force doctrine, the Raptor would normally escort B-2 Spirit stealth bombers in “kicking down the door” of an enemy’s air defenses. However, U.S. Africa Command, which is running Operation Odyssey Dawn, confirmed the F-22 has not flown over Libya.
“I see no indication that F-22s were used as an escort for the B-2 nor do I see anything that indicates the Raptor will be used in future missions over Libya,” said Air Force Maj. Eric Hilliard, a spokesman for Africa Command. On March 20, three B-2s flew bombing runs out of their base at Whiteman Air Force Base (AFB), Mo., against targets in Libya.
Analysts concurred that part of the reason for the absence of the Raptor is that it was not needed to defeat Libya’s relatively pedestrian air defenses. The Libyans have a largely obsolete fleet of aircraft and only older model Soviet surface-to-air weaponry. “Frankly, they might not be needed. Libya’s defenses were not that robust to begin with and were rolled back quite handily,” said Mark Gunzinger, an analyst with the Center for Strategic and Budgetary Analysis, Washington. “Libya is not generally considered a highly capable adversary,” Thompson added.
Gunzinger said that the B-2s probably flew at night, which would eliminate any chance of the billion-dollar warplane being spotted visually by the enemy. The large subsonic aircraft could be potentially vulnerable if it was seen, which is why it would be escorted by high performance stealth fighters like the F-22 if it was flying against a more challenging foe such as Iran or North Korea, Thompson said.
X Wing escribió:
¿Que pasó? No lo entiendo.
En cuanto a lo demás, sí estoy de acuerdo.
Saludos.
Qué no entiendes amigo X Wing?
En una prueba, un Raptor lanzó una JDAM de 450 kg desde 15.000 m de altitud, mientras volaba a una velocidad de Mach 1,5, e impactó en un objetivo móvil que se encontraba a 38 km de distancia
Pero bueh... qué se yo de nada.
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