-- Last Updated: Apr-11-12 9:00 PM EST --
Water is very, very dense compared to Air.
Airplanes use engines, lots of power/thrust/force
working in an extremely un-dense medium of air.
Comparing apples to oranges in my opinion.
Getting a human pedal powered airplane to fly
took a massive amount of physical training and
a huge amount of technical design to make it happen.
Modifying a winged paddle for human powered paddling
won't pay any large dividends, maybe 1% .
Remember that article by Epic Kayaks involving rudders
- ""A rudder will add less than 2% total drag.""
How much of a percentage do you expect (in theory)
might be advantageously created via paddle blade shape
Cost/Benefit ratio doesn't give me bang for the buck