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Fast, accurate delivery of metal to the shot well is critical to the success of any cold chamber die casting operation. For some metals this is a simple problem to solve. Magnesium, however, requires more innovative thinking. Simplicity of design is essential for reliable operation in the environment of a magnesium die casting facility. Complex control is required to provide speed and accuracy of shot delivery. Blending these two ingredients to produce a viable system produces a truly innovative shot delivery system for magnesium. Construction details of a newly developed stand alone system for the auto ladling of magnesium will be presented. Data with regard to speed and accuracy will also be presented.

In order to make quality magnesium castings, whether for die, sand, or permanent mold cast applications, correct molten metal handling practices must be known and followed. This requires written procedures of desired work practices for every step of the molten metal operation. Only after correct procedures are established and consistently followed by all personnel involved can a consistent quality product be realized. Consistency must be the first step in achieving quality and is probably the most difficult step to achieve. This paper deals with breakdown (melting) techniques, temperature control, transfer methods, and proper protective atmospheres that lend themselves to producing a quality magnesium alloy product.

THIS paper points out that high-power substratosphere flight will require a close coordination of airplane, engine, and propeller designers in order to insure the most efficient conversion of power. If this coordination is not done, substantial penalties in propeller performance will be obtained. Substratosphere flight with high powers is going to require propellers which are appreciably heavier than present ones. However, although weights will increase, it is expected that the upward trend in specific weights can be reduced.