| 摘要 |
An aerial vehicle has a lift assembly and a fender cage that can rotate about two mutually perpendicular axes. The fender cage is supported by an endless annular track 14 in which a rotary bearing is engaged that connects the lift assembly to the track. This permits rotation of the lift assembly about axis L. The fender cage has opposing hubs 15. Within these are rotary bearings that allow the fender cage to rotate about a second axis H, perpendicular to the first. If the aerial vehicle is involved in a collision it should not be cause to tumble in an uncontrolled manner. The present invention is relatively less complex to assemble, has fewer components and may be fabricated with an improved strength to weight ratio than prior art. |
