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.


Share this story:

About Author


Ben has worked as a journalist and editor, covering technology, engineering and industry for the last 20 years. Initially writing about subjects from nuclear submarines to autonomous cars to future design and manufacturing technologies, he was editor of a leading UK-based engineering magazine before becoming editor of Aerospace Testing in 2017.

Comments are closed.