Felix ho trovato questo in inglese:
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Apache improvements Since the earliest days of AH-64A operations there have been attempts to upgrade the aircraft. In the mid-1980s McDonnell Douglas began studies of the Advanced Apache/Apache Plus, which was later referred to, unofficially, as the 'AH-64B'. The AH-64B would have had a revised, updated cockpit with a new fire control system, Stinger air-to-air missiles, a redesigned Chain Gun* and a fin-mounted video camera. AH-64B was aimed at the US Army, but a similar AH-64G was proposed for the German anti-tank helicopter requirement, now filled by the Eurocopter Tiger. In 1988 funding was released for an AH-64 Multi-Stage Improvement Program (MSIP) to improve the Apache's sensor and weapons suites while integrating new digital databus and communications systems. The MSIP was abandoned before it reached the hardware stage. The reason was that new technologies, which had always been 'earmarked' for application to the Apache, were finally becoming real — and with them came the possibility for transforming the already formidable Apache into something even better.
A scries of upgrades was proposed after Operation Desert Storm, the so-called AH-64A+/Desert Storm fixes. These included VHF/FM NoE communications improvements (a long-recognised Apache problem), a desert filtration kit, ground-proximity warning system, TADS/PNVS and Chain Gun" accuracy improvements, GPS, new HF radio, SINCGARS secure radio, improved IFF and flight control computer upgrade. Like the proposed MSIP these changes were abandoned in favour of a far-reaching and highly integrated transformation of the AH-64A, through the addition of a revolutionary new radar system and completely revised onboard systems. Millimetre-wave (MMW) radar guidance had always been an option for Hellfire guidance, but was rejected for the AH-64A as the technology was not mature enough. In the Airborne Adverse Weather Weapon System (AAWWS), Westinghouse, in collaboration with Martin-Marietta (now Lockheed Martin Orlando), developed the Longbow MMW radar. Longbow is now being integrated into the US Army's Apache fleet, transforming existing aircraft into AH-64D Longbow Apaches. MMW technology overcomes the existing limitations in the Apache's targeting optics/laser combination. At present, the AH-64A can simultaneously engage two targets using its own designator, at a range of up to 8000 m (26,247 ft), day or night. However, the laser and FLIR are constrained by atmospheric conditions and the Hellfirc's range is limited if the cloud ceiling is less than 400 ft (122 m) AGL. To make a self-designated kill at maximum range, the AH-64A must unmask for 37 seconds.
C'è anche questo:
http://en.wikipedia.org/wiki/AH-64_Apache dove parla dell'A+
Ti metto i link ad alcune foto non so se le hai già:
http://it.wikipedia.org/wiki/File:Greek_AH-64A%2B_Apache_%282%29.JPG
http://commons.wikimedia.org/wiki/File:Greek_AH-64A%2B_Apache_%281%29.JPG
http://www.airfighters.com/photo/46782/M/Greece-Army/McDonnell-Douglas-AH-64A-Apache/ES1011/
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Ciao ALBERTO