Actually, if the wing was tethered to the floor of the torus, the wing could 'kite'. The lift is produced by air flow over the wing. As long as there is a tether to counter the drag produced, the wing will lift in proportion to the air speed. Without the tether, drag and gravity would pull the wing backward and to the floor. In short, you need something to counter the drag, either some form of thrust or a tether to be able to generate lift.
Another possibility is to tilt the torus to some angle steeper than the lift to drag ratio of the wing. Then the wing could theoretically soar the rising air in one side of the torus.
By the way, a convection cycle is like a torus. You have air heated by the sun which rises, the vacated space is filled with sinking cooler air. Soaring gliders ride these vertical currents for hours.