Sikorsky X2 a helicopter? - Fort Worth Star Telegram (blog)

Sikorsky X2 a helicopter? - Fort Worth Star Telegram (blog)

Is Sikorsky X2 a helicopter? Fort Worth Star Telegram (blog) An interesting story that challenges Sikorsky Aircraft Co.'s claim that its X2 experimental aircraft is setting new records for helicopter speed. ... Prototype Hits 235 Knots — Amid Dispute About Whether It's Truly A helicopter or notFOX CT