That's feasible Rob I went along that road and thought how
much easier than a rounded oar, but there are simpler designs to employ.
I think it was much more complex than that.
Remember that apart from sail rowing was the only means of propelling a boat when these came along then with mechanical propulsion they were less important. I am old enough to remember the oars that were in use when I was young coming from that period.
Some features are lost in the "modern" equivalents.
I am anticipating some smart ass coming along and saying the pulled boats with horses/ How about punts/they paddled canoes.
Digressing slightly are there any more ( let's get it over with)
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