Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Piasecki PA-97 - 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.It crashed during a test flight killing the pilot.
Mean Of Transportation