Comes 11 years
after the five-bladed
Advanced Technology Rotor was first tested on an EC145:
Originally Posted by 500 Fan
I think they flew a 5-blade head on a "Quiet" EC135 a while back also.
Five-bladed testbed first photographed in August 2014:
With a five-bladed BLUECOPTER demonstrator formally unveiled in July 2015 as part of the EU's Clean Sky Green Rotorcraft project:
I/C