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US Army Apache Repairman explains why the AH-64D/E is a heavy attack helicopter while the AH-1Z Viper is a medium attack helicopter - The Aviation Geek Club
Bell Flight on LinkedIn: Four Ways the Bell AH-1Z Viper Is Shaping the Future of Flight | 16 comments
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The AH-1Z Viper Performed The First Link 16 Test Flight As The H-1 Mixed Fleet Surpassed 400,000 Flight Hours - The Aviationist
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