| 摘要 |
A method of launching a powered unmanned aerial vehicle (10), the method comprising lifting the vehicle (10) by attachment to a lighter- than-air carrier (12) from a substantially ground-level location to an elevated altitude, wherein the vehicle (10) is prevented from entering its flight mode during ascent, causing the vehicle (10) to detach from the carrier (12) while the velocity of the vehicle (10) relative to the carrier (12) is substantially zero, the vehicle (10) thereafter decreasing in altitude as it accelerates to a velocity where it is capable of preventing any further descent and can begin independent sustained flight. |
