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Piasecki PA97 Helistat Accident Crash - helicopter helium blimp hybrid air vehicle heavy lift

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Uploaded on May 29, 2009

The Piasecki PA-97 Helistat was an American experimental heavy-lift aircraft, built by Piasecki by fastening four obsolete helicopters to a framework beneath a helium blimp.

The PA-97 was built under a 1980 U.S. Navy contract for the Forest Service to demonstrate a heavy vertical air lifter for harvesting timber from inaccessible terrain. The single demonstrator used a Navy ZPG-2W blimp and four H-34J helicopters. The combination of a large blimp with powered lift made the 343 feet (104.57 m) long helistat the largest dynamic lift aircraft in the world.

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