(GB2281761-B)      A transverse flow turbine comprising a paddle assembly comprising a number of paddle shafts, each having one end rotatably supported in a central hub, and each extending radially from the hub so as to be spaced equiangularly from circumferentially adjacent ones of the paddle shafts, each said paddle shaft being further rotatably supported intermediate its ends by support means rigidly connected to the hub, the paddle assembly further comprising a number of paddles each connected to the radially outer end of a respective one of the paddle shafts so as to extend asymmetrically therefrom, the means for rotatably supporting each paddle shaft enabling each paddle shaft and its respective paddle to pivot about an axis extending longitudinally of the respective paddle shaft, each said paddle shaft further comprising a respective sleeve gear mounted thereon, the hub of the paddle assembly being rigidly connected to a vertical shaft mounted in a support frame for rotation about a vertical axis extending longitudinally of the vertical shaft, the vertical shaft also comprising means enabling drive to be taken therefrom, two fixed gear means being provided at diametrically opposite locations with respect to the hub for intermittent engagement with each said sleeve gear as said paddle assembly rotates about the vertical axis, whereby the intermittent engagement results in pivoting of the shafts to cause cyclic switching of each said paddle between a feathered position, in which the paddle is aligned in a substantially horizontal plane, and a drive position in which the paddle is aligned substantially vertically, whereby in use, with the turbine installed so the fixed gear means are disposed in respective substantially upstream and substantially downstream positions with respect to a fluid flow transverse to the vertical axis, the fluid flow can impinge upon the paddles, when they are in their drive positions, to cause rotation of the paddle assembly and the vertical shaft about the vertical axis, enabling a useful drive output to be derived from the fluid flow.