The present paper describes the general construction and the experiment of a new dial presentation system of gyro horizon which indicates the attitude of airplane by the attitude of a miniature model airplane relative to the artificial horizon line fixed to the case of the gyro horizon. This dial presentation system has an utterly opposite action to the Sperry-type dial presentation which can be said as a subjective presentation system while the system newly devised as an objective system. The new presentation system is applied to the air-driven gyro horizon. The erecting curves and the turn errors of the gyro horizon are investigated theoretically and compared with the experiment.
