Sikorsky-Boeing SB1 Defiant begins ground tests


The Sikorsky-Boeing SB1 Defiant helicopter has started  ground runs of its unique rotor at the Sikorsky Development Flight Center in West Palm Beach, Florida.

The Defiant has a rigid, co-axial design which increases speed and range compared to conventional helicopters with a single rotor

The Defiant is one of two helicopters being developed as part of the US Army’s Future Vertical Lift-Medium program, which aims to develop a successor for the Blackhawk and Apache helicopters

Bell’s V-280 Valor tilt-rotor helicopter is also progressing through its testing program and last week reached its nominal cruising speed of 280 knots during flight tests.



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Ben has worked all of his career as a journalist and now editor, covering almost all aspects of technology, engineering and industry. In the last 20 years he has written on subjects from nuclear submarines and autonomous cars to future design and manufacturing technologies and commercial aviation. Latterly editor of a leading engineering magazine, he brings an eye for a great story and lots of experience to the team.

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