Abstract: An unmanned aerial system (UAS) including a sonotube deployable multicopter (SDM) having a plurality of rotors for propulsion, a plurality of extension arms, and a central pivot device. Each extension arm supports at least one of the plurality of rotors. The central pivot device supports the plurality of extension arms radially extending from the central pivot device. Pivotal movement of a first arm-support structure of the central pivot device relative to a second arm-support structure of the central pivot device rotates a first pair of the plurality of extension arms in unison relative to a second pair of the plurality of extension arms. The pivotal movement is biased to rotate the plurality of extension arms from a compact configuration to an expanded configuration while the UAS is airborne. The SDM configured to be held inside a sonoshell in the compact configuration.

Abstract: An unmanned aerial system (UAS) including a sonotube deployable multicopter (SDM) having a plurality of rotors for propulsion, a plurality of extension arms, and a central pivot device. Each extension arm supports at least one of the plurality of rotors. The central pivot device supports the plurality of extension arms radially extending from the central pivot device. Pivotal movement of a first arm-support structure of the central pivot device relative to a second arm-support structure of the central pivot device rotates a first pair of the plurality of extension arms in unison relative to a second pair of the plurality of extension arms. The pivotal movement is biased to rotate the plurality of extension arms from a compact configuration to an expanded configuration while the UAS is airborne. The SDM configured to be held inside a sonoshell in the compact configuration.