| 摘要 |
An arrangement of lifting surfaces comprising a primary lifting surface 1 having a flexural axis 4 extending in the spanwise direction of the lifting surface and including a root 2 and a tip 3. A first tip device 6 is attached to the tip and has a first lifting surface 7. A second tip device 8 is attached to the tip and has a second lifting surface 9. A control system 14 is coupled to the first and second tip devices for moving the first and second lifting surfaces relative to the tip and/or for actively controlling circulation of the first and second lifting surfaces. The wing tip devices may be moved by first and second actuators 12,13. The control system is operable to change a value of torque effective at the primary lifting surface about the flexural axis. Also disclosed is a method of controlling an arrangement of lifting surfaces. |
