Winged sailing craft
OwnerDouglas James Maconochieinventor
Life of this patent
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Abstract
A sailing craft that can transform from wind propulsion mode to flying mode, comprises a body and two sails or wings each pivotally connected to a common boom which is supported by a spar pivotally connected to the body. The dihedral angle between the wings can be varied by a system of adjustable stays between the masts and the upper and lower ends of the spar. In sailing mode, either wing can be tilted essentially upright and swung relative to the axis of the body to derive propulsion from the apparent wind whilst the other is essentially horizontal to develop counter balancing moments. In flying mode, both sails can be tilted essentially horizontal to derive lift from the apparent wind.
Claims17
A winged sailing craft comprising:
- a body having an essentially horizontal longitudinal axis operable by a crew along a surface of water, land, ice or snow;
- a spar that is attached to the body;
- the spar moveable in roll, pitch and yaw;
- a boom having a longitudinal axis and connected to the spar, the boom axially moveable in the spar;
- a pair of wings each having an inboard and separated from an outboard end by means of a mast extending lengthwise there between, each inboard and of the masts attached to the boom;
- the wings having an airfoil section, chord wise and having planar symmetry about he boom axis;
- the wings creating an angle that the spar always bisects;
- the angle being changeable by pivoting the masts on the boom.
Dependencies are inferred from the claim text.