Spark plug positioning device for combustion chamber of engine in airplane, has vent including support plane for receiving contact ring, where support plane is defined by flange whose portion is in straight or concave shape

摘要

The device (20) has a floating bush (22) provided with a contact ring (24). A vent (21) receives a spark plug previously introduced in the bush. The vent includes a support plane (23) for receiving the contact ring. The support plane is defined by a flange (26), where a portion of the flange is in straight or concave shape. The flange is in polygon, square or quadrilateral shape. A cup (28) is integrated to an upper end of the flange. A cooling unit (30) is provided in the vent.