Combined Hovercraft and Helicopter
An anonymous reader writes "Has British engineer Geoff Hatton brought us the best of two worlds with his UFO-looking machine? The US military thinks so and are investing in it. The design is sturdy (as opposed to a helicopter) and can fly high (as opposed to a hovercraft). It is based on the Coanda Effect."
How many of those helicopters that are still flying were flown a wall at any point during their service life?
Brackets contain world's first nanosig, highly magnified:[.]