Fig. 66.—The Dixie Model 60 for Six-Cylinder Airplane Engine Ignition.
THE DIXIE MAGNETO
The Dixie magneto, shown at [Fig. 66], operates on a different principle than the rotary armature type. It is used on the Hall-Scott and other aviation engines. In this magneto the rotating member consists of two pieces of magnetic material separated by a non-magnetic center piece. This member constitutes true rotating poles for the magnet and rotates in a field structure, composed of two laminated field pieces, riveted between two non-magnetic rings. The bearings for the rotating poles are mounted in steel plates, which lie against the poles of the magnets. When the magnet poles rotate, the magnetic lines of force from each magnet pole are carried directly to the field pieces and through the windings, without reversal through the mass of the rotating member and with only a single air gap. There are no losses by flux reversal in the rotating part, such as take place in other machines, and this is said to account for the high efficiency of the instrument.
Fig. 67.—Installation Dimensions of Dixie Model 60 Magneto.
Fig. 68.—The Rotating Elements of the Dixie Magneto.