Propeller casting. Start with cope, drag, pattern and pattern board.

Place pattern board between cope and drag sections. Apply parting dust lightly over pattern.
Completely cover pattern with fine riddle. Completely covering the pattern using the fine riddle will insure fine detail.
Fill the rest of the drag using a coarse riddle. Flush to the top (see next photo). Ram outside edges of mold using a ramming paddle. This prevents leaks during pouring.
Ram with peen side of rammer. North to south then east to west. Not real hard, but evenly. Then fill the mold (without riddling), to about 2 inches over the top.
Then ram with the butt side of rammer (harder ram). Strike off mold leaving a small amount of loose sand to cushion bottom board.
Place board on drag section and flip the entire unit over. Remove cope section (empty) and pattern board from mold.
Propeller is mostly buried. Sand must be cut down to parting line. The equator of the Earth is a good example, separating the 2 halves of the mold at the "parting line". Cut down to the parting line and then smooth the sand with your spoon to insure separation from the cope.
Mark the location of your sprue by slightly pressing the cutter into the sand. Place cope section on mold. Apply parting dust to mold, this will keep cope and drag separated.
Cover the pattern using the fine riddle. Fill remainder of cope with the coarse riddle and tuck edges with paddle rammer (same as drag).
Ram mold east to west and then in a north to south pattern. Gentle but firm. Same as drag. Fill cope 2 inches above top and ram with butt side of rammer. Then cope is struck off and slicked smooth with a trowel.

Continued on:    Step- By- Step 2

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