Posted by: carldelo on Apr-11-12 7:07 PM (EST)
I recommend you read the article linked above by willi-h20. It has some info on what you ask. From looking at Figure 1, it appears that the lift and drag forces on a wing paddle both contribute to propulsion, the extent depends on orientation and paddle path. Also, if you could point me to some info on the researchers you mention, I would appreciate the info.