From the 1905 online book, Problems in Woodworking, is a chapter about canoe paddles. Included is a diagram of a standard beavertail paddle with pear grip showing all the relevant specs for width, length, and thickness. Interesting to note the thinning of the circular shaft (1-1/8th inch) down to 1 inch at the throat of the blade. I generally make the shafts on my paddles 1-1/8th inch thick as well but never really thinned the throat like this plan shows. Logically I wonder if it would weaken the paddle right at this location where the large blade area of this design would presumably concentrate the most force.
I'm an avid canoeist and general "outdoorsy type" guy with a bit of an artistic side. Recently started this hobby of making custom canoe paddles after my disappointing experience with most commercial brands. This site documents various styles of single blade canoe paddles I've made or researched as well as other canoe related info I've stumbled across on my internet wanderings. Hope you enjoy your visit.