| 20100074754 | Securing Device For Connecting Blades To Blade-Root Attachment Of Remote-Control Helicopters - A remote-control helicopter rotor mechanism includes a rotor with multiple blade-root attachments and each blade-root attachment includes a slot located between two arms. Each arm includes two clamping surfaces and a recess which is defined longitudinally in an inside thereof and located between the two clamping surfaces. Multiple blades each have an elongate body and a root, the root has two protrusions extending from two opposite sides thereof and a passage is defined through the two protrusions and the root. The root inserted into the slot of the blade-root attachment corresponding thereto and a screw extends through the two arms and the passage of the root to connect the root within the slot. The protrusions are matched with the recesses of the two arms and the two clamping surfaces are matched with surfaces of the root. | 03-25-2010 |
