D-Dalus is a completely new aerial vehicle shown first time at the Paris Air Show in 2011. "D-Dalus" combines the advantages of helicopters with those of fixed wing aircrafts, stays stabile in the air, rotates about all three axis at 360 degree, has the ability to land on moving platforms like boats in rough sea thanks three dimensional synchronization and glue down by reversed thrust.

 

"D-Dalus" need in forward flight 30 to 60 % less power compare to helicopter because vertical thrust is created by its high lift and low drag wing body design.

At the heart of "D-Dalus" aircraft propulsion system lies a "cyclogyro" rotor assembly that converts power from a conventional motor into a forced airflow across aerodynamic blades.

The propulsion consists of 4 sets of contra-rotating disks, each set driven at the same rpm by a conventional aero-engine.  The disks are surrounded by blades whose angle of attack can be altered by moving an offset point located inside the hollow axis of the rotating disks.
 
As each blade can be given a different angle of attack, the resulting main thrust can be in any required direction in 360° around any axis. This allows the aircraft to launch vertically, remain in a fixed position in the air, fly in any direction, rotate in any direction like a football, and thrust upwards thereby 'gluing down' on landing.