Groups of fixed-wing robots can benefit from moving in synchrony to share sensing and communication capabilities, avoid collisions or produce visually pleasing choreographies. Synchronous motion is especially challenging when using fixed-wing robots that require continuous forward motion to fly. For such platforms, performing trajectories with forward speed lower than the minimum speed of the robot can only be achieved by acting on its heading turn rate. Synchronizing such highly dynamical systems would typically require position information and entail frequent sensing and communication among robots within the group. Instead here we propose a simple controller that reacts to regular beats received through wireless transmissions. Thanks to these beats, robot headings synchronize over time. Furthermore, these controllers can easily be parameterized to steer and regulate the global progression speed of groups of robots. Experiments are performed both in simulation and using up to five fixed-wing flying robots.