Australia confirmed on Wednesday it would buy 40 Black Hawk military helicopters from the United States for an estimated A$2.8 billion ($1.96 billion), finalising a sale signed off by the U.S. State Department last August. The Lockheed Martin Corp UH-60M Black Hawks will replace the Army's fleet of MRH-90 Taipan choppers, which have been plagued for years by maintenance issues. Delivery of the new helicopters will begin this year. Australia spend $2 billion on 40 U.S. Black Hawk says ‘goodbye Taipans, hello Black Hawks’