el radar Longbow le agrega al apache una ventaja tecnologica innegable.La avionica del AH64D es superior en muchos puntos a la del Mi-28N ,las posibilidades del longbow son muy grandes y rusia al dia de hoy no se si sera capaz de integrarle algo si.
ya,,,,comentario absurdo ..pero es q es feo y narizon el jodido jejejej
¿Tienes documentos fiables en el que te bases para hacer una firmación tan tajante?
The Longbow Fire Control Radar significantly improves the adverse weather fighting abilities of the AH-64D helicopter, provides a true fire-and-forget capability and increases target acquisition efficiency and effectiveness, thus increasing battlefield effectiveness and survivability. The aircraft is able to detect and classify more than 128 targets, prioritize the 16 most dangerous targets, transmit the information to other aircraft and initiate a precision attack -- all this in fewer than 30 seconds.
With the addition of a new and highly sophisticated fire control radar (FCR), more commonly called the Longbow Fire Control Radar, the AH-64D has become the most advanced aerial fighting vehicle in the world. The FCR provides the Apache with the ability to detect, classify and prioritize stationary and moving targets both on the ground and in the air. With state of the art fire control, digital communications, automatic target classification and many other up to date features, the AH-64D Longbow Apache will dominate the battlefield for years to come.
The AH-64D Apache Longbow increases combat effectiveness over the AH-64A by providing a more flexible digital electronics architecture and integrating computer-based on-board Built-In Test Equipment (BITE), Automatic Test Equipment (ATE), and hard copy operator or Interactive Electronic Technical Manual (IETM) troubleshooting/maintenance manuals that will easily accommodate changes resulting from system growth. In addition, upgrades to electrical power and cooling systems and the expansion of the forward avionics bays to accommodate the installation of the FCR, and provide for future growth. Navigation system accuracy is improved through integration of a miniaturized integrated Embedded Global Positioning System (GPS)/Inertial Navigation Unit (INU) (EGI), and an improved DOPPLER Velocity Rate Sensor (DVRS).
The fully integrated AH-64D without Longbow Mission Kit incorporates greater ordnance capability and flexibility than the AH-64A by utilizing the family of Semi-Active Laser (SAL) missiles (including the HELLFIRE II) and Longbow HELLFIRE RF Missile. The AH-64D without Longbow Mission Kit can operate in harmony with the FCR-equipped AH-64D and can accept a target hand over and fire the Longbow missile with minimum exposure to hostile forces.
The AN/APG-78 FCR is a multi-mode Millimeter Wave (MMW) sensor integrated on the Apache Longbow with the antenna and transmitter located above the aircraft main rotor head. It enhances Longbow system capabilities by providing rapid automatic detection, classification, and prioritization of multiple ground and air targets. The radar provides this capability in adverse weather and under battlefield obscurants. The FCR has four modes: (1) the Air Targeting Mode (ATM) which detects, classifies, and prioritizes fixed and rotary wing threats; (2) the Ground Targeting Mode (GTM) which detects, classifies, and prioritizes ground and air targets; (3) the Terrain Profiling Mode (TPM) which provides obstacle detection and adverse weather pilotage aids to the Longbow crew; (4) and the Built in Test (BIT) Mode which monitors radar performance in flight and isolates electronic failures before and during maintenance.
The Longbow RF missile and the Longbow HELLFIRE Launcher (LBHL) are referred to as the LBHMMS. The system incorporates a fire-and-forget missile that accepts primary and/or secondary targeting information from the FCR and single targeting information from TADS or another aircraft to acquire and engage targets. Similar to the FCR, the RF missile provides the capability to engage threats in adverse weather and through battlefield obscurants. Two acquisition modes, lock-on-before-launch (LOBL) and lock-on-after-launch (LOAL), allow engagement of ground and rotary wing threats at extended ranges. In the LOBL mode, the missile will acquire and track moving or short range stationary targets prior to leaving the launch platform. In the LOAL mode, the missile will acquire long range stationary targets shortly after leaving the launch platform.
The Longbow Hellfire missile is a radar-guided version of the laser-guided Hellfire anti-tank, air-to-ground missile. The Army manages Longbow Hellfire missile as a separate program. The Longbow Hellfire features an active millimeter wave seeker and a dual tandem warhead designed to defeat reactive armor. Either the FCR or the Target Acquisition and Designation Sight can provide target location data to the missile prior to launch. The Longbow Hellfire can engage moving or stationary vehicles. The missile is being upgraded through the Home-on-Jam/Anti-Jam (HOJ/AJ) and Counter-Active Protection System (CAPS) programs. The HOJ/AJ upgrade is a software revision that changes the guidance logic to improve effectiveness against self-screening and standoff jammers. The CAPS upgrade includes hardware and software to provide active counter-countermeasures for the missile.
The combination of the integrated FCR, LBHMMS and the Apache aircraft enhances battlefield awareness by providing coverage of the battle area at extended ranges, by reducing operational dependence on weather and battlefield conditions, and by rapid display of detected targets. It further improves the Longbow system's war fighting capability and survivability by providing rapid multi-target detection and engagement ability, navigational aids, and a fire-and-forget weapon delivery system.
The addition of the Longbow FCR provides a second and completely independent target acquisition sensor which may be operated by either crew member or combined to provide a degree of multi-sensor synergy. When operated independently, the pilot could use the FCR to search for air targets in the ATM mode while the copilot/gunner (CPG) searches for ground targets using the Target Acquisition Designation Sight (TADS).
Using both TADS and the FCR together combines the unique advantage of each sight. The rapid search, detection, classification, and prioritization of targets by the Longbow FCR can then be quickly and positively identified by using the electro-optics of TADS. The center of view can be focused on the location of the highest priority target and the CPG, at the touch of a switch, can view either display. Alternately, the FCR centerline can be cued to the TADS so that a rapid and narrow search could be made of a suspected target area.
The RFI is an integral part of the Longbow FCR. It has sensitivity over an RF spectrum to detect threat emitters when a threat radar is in a search and acquisition mode and also when the threat emitter is "looking" directly at and tracking the Longbow system. The RF band has been extended over that which was developed for the OH-58D Kiowa Warrior at the low end of the RF spectrum to detect newly identified air defense threats. The RFI has a programmable threat emitter library to allow additional threat signatures to be stored and/or updated.
alejo10 escribió:amigo ,no me tiene que decir absolutamente nadie lo evidente,el sistema Longbow es su cometido es lo mas avanzado q existe....
hay gente q no tiene por donde salir
amigo ,no me tiene que decir absolutamente nadie lo evidente,el sistema Longbow es su cometido es lo mas avanzado q existe....
hay gente q no tiene por donde salir Confused
OK, veamos, en primera, sabes como trabajan los radares de ondas milimétricas?, sabes acaso cómo usar las fórmulas para saber el alcance teórico de dichas ondas en ambientes discretos?, sabes acaso como las computadoras de tiro procesan la información que les llega de dichas ondas?, sabes el alcance de cada una de las frecuencias que usan los radares?, y sabes las aplicaciones de dichas frecuencias en la composición de datos que se usan en las computadoras de tiro?, y sabes también cómo es que las computadoras procesan dicha información?,
alejo10 escribió:OK, veamos, en primera, sabes como trabajan los radares de ondas milimétricas?, sabes acaso cómo usar las fórmulas para saber el alcance teórico de dichas ondas en ambientes discretos?, sabes acaso como las computadoras de tiro procesan la información que les llega de dichas ondas?, sabes el alcance de cada una de las frecuencias que usan los radares?, y sabes las aplicaciones de dichas frecuencias en la composición de datos que se usan en las computadoras de tiro?, y sabes también cómo es que las computadoras procesan dicha información?,
con tus preguntas ....q son totalmente imposibles de contestar ni tu ,ni yo, ni nadie
pero esto es un foro y sirve para opinar unos con mas criterio q otros....esas preguntas amigo imposible por cuestiones obvias.
AH-64D Apache Longbow: Current improvement programme based on Lockheed Martin and Northrop Grumman joint venture development of mast-mounted AN/APG-78 Longbow millimetre-wave radar and Hellfire missile with RF seeker; Northrop Grumman has lead on Longbow with Lockheed Martin taking principal role for Hellfire. Programme also includes more powerful engines, larger generators, MIL-STD-1553B databus allied to dual 1750A processors
Processors based on MIL-STD-1750A are usually programmed in JOVIAL, a high-level programming language defined by the United States Department of Defense which was derived from Algol. Older versions of GNU GCC contain support for MIL-STD-1750A; it was declared obsolete in version 3.1, and removed in subsequent versions.
The 1750A supports 216 16-bit words of memory for the core standard. The standard defines an optional memory management unit that allows 220 16-bit words of memory using 512 page mapping registers (in the I/O space), defining separate instruction and data spaces, and keyed memory access control.
Most instructions are 16 bits, although some have a 16-bit extension. The standard computer has 16 general purpose 16-bit registers (0 through 15). Registers 1 through 15 can be used as index registers. Registers 12 through 15 can be used as base registers. Any of the 16 registers could be used as a stack pointer for the SJS & URS instructions (stack jump subroutine & unstack return subroutine), but only register 15 was used as the stack pointer for the PSHM & POPM instructions (push multiple & pop multiple). The computer has instructions for 16, and 32-bit binary arithmetic, as well as 32 and 48 bit floating point. I/O is generally via the I/O instructions (XIO and VIO), which have a separate 216 16-bit word address space and may have a specialized bus.
While successful in its intended role, the 1750A is now considered obsolete. With the release of the Notice 4 revision to the standard on July 31, 1996 MIL-STD-1750A was declared inactive for use in new designs.
pero tampoco se las bandas de operaciones de un Apg77 interceptando a un Ef2000 ni los alcances depende del grado de contramedidas,,,ni tu ni nadie del foro...
:pero para eso usas logicas y un poco de razonamiento para saber que o quien tiene mas posibilidades
Ah-64:
Rango: 8 km
Frecuencia: Banda Ka
Mi-28:
Rango: 20 km para la banda I/J, 10 para banda Ka
Frecuancia: bandas Ka (milimétricas) y bandas I/J (centimétricas)
depende dle sistema de armas o el origen...
) podamos saber el alcance real de las camaras termicas del aparato en determinados ambientes de baja visibilidad,alcance y modos de oepracion
pero lo que ya hace rato te quiero decir es q es imposible q ni tu ni yo (bueno yo no se si eres de la CIA Wink ) podamos saber el alcance real de las camaras termicas del aparato en determinados ambientes de baja visibilidad,alcance y modos de oepracion
caracteristicas de los radares apg78 y del modelo en ambientes de contramedidas,y enganche de objetivos en movimiento ,frecuencias de operacion en ambientes de fuertes ECM.............etc
amigo lo q pones....es muy facil....con el Goegle Wink
pero los datos mas relevantes de sus sistemas,,,,,amigo ni tu ni yo lo vamos a saber.....solo de forma muy general
para mi sin dudarlo la avionica del ah64D en la mayoria de sus aspectos me ofrece mas garantias....y no solo comparandola con el Mil-mi28N sino q en muchos aspectos es mejor que nuestro Tigre HAD
al no disponer de nada parecido al aPG78 q ha sido probado en combate con exito y esto es importante a mi modo de juicio
pero lo que ya hace rato te quiero decir es q es imposible q ni tu ni yo (bueno yo no se si eres de la CIA ) podamos saber el alcance real de las camaras termicas del aparato en determinados ambientes de baja visibilidad,alcance y modos de oepracion
caracteristicas de los radares apg78 y del modelo en ambientes de contramedidas,y enganche de objetivos en movimiento ,frecuencias de operacion en ambientes de fuertes ECM.............etc
Tomcatter escribió:Es una cuestion de cargas. Un Hind con 8 soldados no puede cargar la misma cantidad de armas, municiones y combustible que uno que no los lleve. lo de transporte de tropas se emplea en pocas ocasiones.Es raro pero no excepcional. El Merkava bien puede llevar soldados y no es un APC. Pues el Hind lo mismo.
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