Subject: Re: [baidarka] Superiority of Native paddles
From: Hendrik Maroske (HMaroske@exmail.de)
Date: Wed Jun 20 2001 - 16:55:57 EDT
> From: "Peter A. Chopelas" <pac@premier1.net>
>
> Hi all,
>
> Since things have been a bit slow I thought I would give you all something
> to chew on.
[...]
> Therefore just for grins I have listed a mathematical proof that you
> technical types might find interesting. If the rest of you just read my
> text you should be able to follow the idea of the math without having to do
> it, at the very least if you may find the conclusion very interesting.
Huh?
[...]
> Most of this I have pulled from "Theory of Flight" by Von Mises, and from a
> few other books if you are so inclined to verify the equations.
Aaaaahhhhh, I knew the equations were familiar to me. Okay. This looks
promising.
Well, there are different opinions on how these equations can be used for
calculating an airplane. I hnow of some guys who really are earnestly
convinced
that all this does not apply for their type of plane, so if there are
differing
opinions about how to use this for aircraft, how can we try to use this for
something else?
> There will be a quiz next week.
Hmmm on the other hand, this looks like a very good experiment. Just don't
think
I can come up with a solution in the next seven days. Give me more time for
this
for a good answer.
One first thought is this: on a typical wing, a high aspect ratio is good
for
a low lift to drag ratio; less lift means less induced drag; so if we want
to
increase total drag (that is, need maximum push), we will want to reduce
aspect
ratio.
On a paddle, the "wing" is rotated 90 degrees... high aspect ratio now will
mean... hmmm...
feeling triggered :-)
Hendrik
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