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Show ....... ...... .... .. -- ': :1 : "" j- jk JET HELICOPTER . . . Former navy pilot William Murray, Wilton, Conn., flics the experimental helicopter K-225 during its first successful flight, just announced by the navy. Instead of using velocity of exhaust gases for forward thrust, the craft uses this power to turn shaft of rotor blades. Engine can operate on low grade fuels or on high octane gasoline. Unlike piston engine, the turbine requires neither a cooling fan or a centrifugal clutch. Engine is 175 h.p. |