A system and method for calibration of a test socket using a composite waveform. Each head element unit is provided with at least one recording element for recording a data signal on the magnetic tape and at least one reproducing element for reproducing a data signal from the magnetic tape. By attenuating the amplitude of vibrations in the disk drive, the present invention allows for increased track densities and produces less acoustical noise than undamped disk drives. The invention also addresses problems associated with poor delineation of ROIs. The torque converter is suspended from the crankshaft via the drive plate. The tail section and nose cone each join to the fuselage through mating bulkhead structures that provide quick connection capability while being readily separated so as to enable the UAV to break apart at these connection points and thereby absorb or dissipate impact upon landing.