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May 6, 2011 05:05 pm

Crashed Helicopter Sparks Concern Over Stealth Secrets

Hugh Pickens writes "The crash of a helicopter involved in the raid on Osama bin Laden's Pakistani hideout has prompted intense speculation about whether the aircraft was specially modified to fly stealthily — and whether its remains could offer hostile governments clues to sensitive US military technology. Remnants of the helicopter, including a nearly intact piece of its tail, suggested that the aircraft involved in the raid wasn't the typical Black Hawk flown by special-operations forces. Aviation experts who scrutinized photos of the scene say the tail had unusual features that suggested the helicopter had been extensively modified to fly quietly, while appearing less visible to radar. 'The odds are fair — based on my knowledge of the subject area — the vast majority of the special MH-60s aircraft were purpose-built to make those aircraft as stealthy as they could possibly be,' says aviation expert Jay Miller, adding that the remnants of the aircraft suggested extensive use of nonmetallic composite parts, which reflect less radar energy. Experts also say the tail rotor's design suggested an effort to reduce the 'acoustic signature' (video) of the helicopters to make them fly more quietly."

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