| 摘要 |
<p>Apparatus for causing an aircraft wheel to rotate in an airflow, comprising a plurality of wind catching-members (54, 128) disposed about a central axis (20, 110). Driving means are provided for drivably moving the wind-catching members (54, 128) between a non-operative, retracted position and an operative, extended position in which the wind-catching members (54, 128) project beyond the outer radial periphery of the aircraft wheel. The invention also provides apparatus for causing an aircraft wheel to rotate, comprising at least one nozzle or vent (126, 156, 164, 178, 184) centred on the axle of the wheel and arranged to expel air at least partially circumferentially with respect to said circle, and air supply means for providing air to the or each nozzle or vent (126, 156, 164, 178, 184) for expulsion therethrough, the air supply means comprising a compressed air source and an air supply passage connecting the compressed air source to the or each nozzle or vent (126, 156, 164, 178, 184), wherein the or each nozzle or vent (126, 156, 164, 178, 184) is rotatable with the wheel such that expulsion of the air through the or each nozzle or vent (126, 156, 164, 178, 184) causes rotation of the wheel.</p> |
