I am thinking of making oars in my spare time.

I saw at the Port Townsend Washington State wooden boat festival a gentleman making large masts that were hollow. He used 6 to 8 tapered angle cut lengths of wood that when glued together make a tapered circular mast. We are talking 80' and longer.   I thought this would be a fun way to make oars. The hole in the center would of course be very small but would the strength of the oar be better because of the way the grain would change…