No Actuators or Control Surfaces
Wings are pivoted by differential thrust from
two electric props connected to each wing.
No servos or actuators are required. Pitch, roll
and yaw control is accomplished through a
combination of differential thrust and wing
Airframe construction is as simple as
two freely pivoting wings attached to a
rotating hub. Each wing has two electric props
to drive the wing forward, and to control
the pitch of the wing. The concept may
have as few a seven moving parts.
To perform a vertical takeoff, the wings
position themselves in opposing directions,
creating a two bladed helicopter rotor.
The four electric props then drive the wings
around a vertical axis, lifting the aircraft
into the air.
Transitioning to Horizontal Flight
Once sufficient altitude has been gained,
the wings begin to pitch downward until
they are both pointing in the same
direction, straight down. Then, they simply
pitch up to enter into horizontal flight.
Horizontal, Fixed Wing Flight
While flying in fixed wing mode, thrust is
created by the four electric props, which can
be highly optimised for creating efficient thrust,
since they never have to lift the aircraft or
meet the demands of limited runway space.
Lift is created by the two large wings in both
vertical and horizontal flight modes, meaning
that the aircraft is always lifted efficiently. The
four electric props never need to provide strong
static thrust for lifting, so they can be optimised
for efficient forward flight instead.
During vertical flight, the wings are able to
alter their pitch quickly, at any point in the
rotation cycle, giving them cyclic
and collective control like a helicopter. During
horizontal flight, the four electric props are
able to provide precise pitch and yaw, while
the pivoting wings enable roll.
Lightweight and Low Drag
In it’s simplest form, the Pivotwing has around seven moving parts and no actuators or transmission systems. This results
in a lightweight, low drag airframe.
Every component is used efficently in both
vertical and horizontal flight modes.