Abstract: A flying body, rotating about its rolling axis, supplies reference signals, in accordance with its angular position, to a control device which produces Cartesian horizontal and vertical control signals. The reference signals effect production of a sawtooth voltage in which each pulse corresponds to a 360.degree. rotation of the flying body. Each voltage pulse produces at least three function potentials spaced from each other by 90.degree., and these function potentials are individually compared with the Cartesian control signals to produce respective pulse width modulating output potentials. These latter are combined to produce a control signal potential which is transmitted to the flying body and which is phase rigid with respect to the rolling position thereof and contains control information for a single control force producing device, on the flying body, with the control information being separate for the vertical and horizontal signal directions and in a timed sequence.