When operating quadcopters (QC), situations arise such as unauthorized intersections of flight paths with flocks of birds and aircraft, physical obstacles along the flight path, and areas with elevated electromagnetic fields. These situations can lead to the QC's destruction. To increase the QC's survivability in such situations, an additional propulsion system (APS) can be installed, allowing for rapid changes in trajectory and flight coordinates. The difficulty in implementing this design solution lies in synchronizing the operation of the main and auxiliary engines. To address this issue, research was conducted and a control system (CS) was developed that synchronizes the engines when the APS is activated, quickly removing the QC from the zone of adverse external influences and maintaining controllability during the rest of the flight.