An improvement in panel-mounted gyroscopic attitude indicators for aircraft of the type having a generally spherical indicating element on which a horizon line divides the element into upper sky and lower ground portions. The indicating sphere is supported in an instrument housing with full roll freedom by a roll gimbal yoke directly attached to and driven in roll by a forward enlarged trunion of the full closed roll gimbal of a vertical gyroscope. The sphere is driven in pitch by a pulley and belt drive mechanism wherein the vertical gyro inner or pitch gimbal carries the drive pulley and the sphere carries the driven pulley. To provide the conventional "inside out" or reversed pitch sensing, the belt is reeved on the pulleys and in crossed or in "figure eight" fashion with the belt crossing or intersection located within the said enlarged forward trunion of the roll gimbal.
