[Paddlewise] Greenland vs Euro paddles

.
Tord wrote;

> But, the high aspect ratio wing works by having the flow chord-wise,
> across the wing at right angles, which hardly is the case with a Greenland
> paddle, rather the reverse, as most of the flow on a GP paddle is 
> spanwise,

I wonder if this really applies. As I understand the stroke described by 
some who use High Aspect Ratio paddles the flow is across the chord as the 
blade slices in an arc from the surface to a more vertical orientation at 
the bottom of the stroke. If I have this wrong maybe the GP people can 
straighten me out.

> Oars are pretty much like GP paddles, and the longer the blades the more
> efficient I find them, till they get impractically long. And you can, on a
> windless evening, easily see how much longer the vortices remain in
> the water when using better oars!

This is an interesting comment. When I was designing rowing shells just 
about every competitor had shifted over to the modern "hatchet" style of 
blade. I did not see any other type during the recent Olympics but then they 
didn't focus much on oars in the coveage. Have they gone back to the old 
narrow blades?

Cheers

John Winters
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