POTENTIAL APPLICATIONS TO AERIAL TRANSPORT SYSTEMS

The PECyT cyclorotor introduces several potential advantages in comparison with traditional VTOL or fixed
wing air vehicles. Since it uses common surfaces to achieve lift and thrust along the full range of flight
speeds, and this can be helpful in eliminating wing drag at high speed. The use of a wing rotating around the
axial axis creates lift, and thrust, when the blades move backward in relation to the vehicle´s direction of
flight. This makes possible to use the intermittent, but very high, lift value generated by the unsteady
pitching of the blades. Further, the rotational speed and pitch of the cyclorotor does not need to increase with
vehicle speed, since the achievable thrust increases with forward airspeed for a constant rotor angular
velocity. Moreover, the cyclorotor lifting area is related to its VTOL efficiency, and that area is inferior than
for helicopters and jet vectored thrust.
The possibilities opened by the development of an air vehicle that is capable to attain high subsonic
velocities, and also capable of VTOL without the need to make a radical reconfiguration of its geometry are
enormous:
– more convenient commercial transportation
– rapid disaster/rescue response
– flexible multi-mission military defense vehicles
– green friendly vehicles able to be powered by renewable or photovoltaic electricity

To achieve these goals, it is proposed that an air vehicle incorporating the PECyT cyclorotor concept must
make use of unconventional aerodynamic and structural innovations, leading to the creation of a
revolutionary subsonic aircraft.
It is considered adequate that a cyclorotor based air vehicle will make use of symmetrical blades with
unlimited controllable pitch in relation to the airframe. This vehicle can make a smooth transition from lowspeed,
and vertical flight, to high speed forward flight by reducing the rotor angular velocity, so that the
blades rotational speeds drop below the forward vehicle flight speed. Since thrust and lift can be maintained
across all speeds, and the achievable thrust increases with increasing vehicle speed at a constant rotor angular
velocity.

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