On Dec 18, 11:03*am, Fred the Red Shirt
wrote:

Resawn Borg lumber will often cup due to residual stresses
left over from rapid kiln drying. *If it does, try repeatedly
moistening and heating the the concave side until it is
the convex side and then let it dry for several days.

You don't want residual stresses in your propeller. *If you
eschew resawing and plane all the way down from full
thickness, plane equal amounts from each side to
minimize cupping.

You can also get more (and probably better) advice
from rec.woowdorking, er, rec.woodworking.

FF
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Good advice. Thank you very much.

-R.S.Hoover