Systems, devices, and methods are provided for a locking apparatus. A locking apparatus can be configured to operably attach a fixed-wing of an aircraft to a body of the aircraft. The locking apparatus can include a first connector configured to releasably receive a first tube, a second connector having a first side and second side, the first side configured to receive a second tube and the second side configured to releasably receive the first connector, and an end coupling cap configured to releasably lock the first connector and second connector together.