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Hi,
The Brantly B-3 was a project for tandem twin rotor helicopter
could accommodated 6-seat and B-4 was very large version of
B-3 but powered by four engines (two forward and two aft) and
could accommodated 50-seat.
Source; Flightglobal
The Brantly B-3 was a project for tandem twin rotor helicopter
could accommodated 6-seat and B-4 was very large version of
B-3 but powered by four engines (two forward and two aft) and
could accommodated 50-seat.
Source; Flightglobal
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