Gyroscopic actuator specially for the attitude control of a satellite

The activator has a support (116) mounted on a base (110) and rotated around an axis (120) by a direct current torque motor (124). The support holds a spinner (134) rotated around an axis (132) that is perpendicular to the axis (120), by a torque motor (144). The spinner has two flanges (136) connected by a shaft (142) that has a diameter less than that of the flanges. The support has a tube (122) on which the shaft turns.