Bonanza 35
Air Traffic Control Fully Certified
Other / Unknown
Aircraft Equipment Problem Less Severe; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Weather / Turbulence
General Declared Emergency
Human Factors; Aircraft
Bonanza 35 departed Runway 06 on an IFR clearance to ZZZ1. The weather was solid IFR. After The BE35 was switched to Departure; and about 1.5 miles off the departure end of the runway; I departed a PA31 off Runway 06. For some reason; the BE35 made a course reversal and headed directly towards the PA31. I gave the PA31 a 020 heading followed by a 330 heading to keep him away from the BE35. Apparently the BE35 had some vertigo; on top of some vibrations from his airplane which caused the abrupt; unauthorized turn. This was a situation that I treated like an emergency.
Tower Controller described a conflict event when an IFR departure turned unexpectedly back toward another IFR departure; the reporter issuing an immediate turn to the second departure.