Subject: RE: [baidarka] Paddle Dynamics 101
From: Peter A. Chopelas (pac@premier1.net)
Date: Wed Jun 20 2001 - 22:36:32 EDT
you wrote:
> If Euro paddles with the areas of Greenland paddles were in common
> use, I think that folks would feel similarly about them. In fact, the
> Current Designs Sabella is one of the few that is in that range (that
> I've used) at 84 sq. in. This paddle is very popular with those that
> have tried it. It's a lovely paddle for long easy trips - rather like a
> Greenland style it would seem.
>
> Most Euro paddles are over 100 sq in in area. The storm paddle I finally
> finished tonight (yay!) has an area of about 80 sq. in. This, not magic
> or aspect ratios, is where the difference lies IMNSHO.
>
> Mike
>
Area is does not affect efficiency directly, the higher wetted area of the
larger blade would have higher drag for the same amount of thrust
generated, but there are many other things that affect this too. All are
very interrated and there is no clear answer since you change one thing you
affect all others.
What I suspect is that the smallest, higher AR blade would take the least
amount of total power input for constant speed low powered cruising. Other
conditions, than other designs would be better.
Must do careful tests to know for sure.
Peter
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