RE: [PSUBS-MAILIST] NACA 65-020 High Aspect Ratio Fin Development

["Jay K. Jeffries" <bottomgun@mindspring.com>]

John,
If you click on the icon "All Sizes" above the image, you can see a larger
view.

Laminar flow and once it is tilted to the oncoming water stream, lift is
developed.  At the speeds we operate at, laminar isn't real important.
R/Jay

-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jon Wallace
Sent: Sunday, September 13, 2009 2:22 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] NACA 65-020 High Aspect Ratio Fin Development


Jay,

I looked at the images and the chord appears to be symmetrical which raises
a couple of questions assuming it is intended as such and I just can't see
enough detail from the photo.  What is the advantage of fabricating a chord
as opposed to a simple flat surface if lift (positive or negative) is not
required or being introduced.

Jon


Jay K. Jeffries wrote:
>
> Here is the link to 5 images that depict a NACA 65-020 high aspect 
> ratio fin and screen captures from my foil development software: 
> http://www.flickr.com/photos/bottomgun/sets/72157622232798965/
>
>  
>
> Let me know if you cannot see this link.
>
> R/Jay
>
>  
>
>  
>
> Resepectfully,
>
> Jay K. Jeffries
>
> Andros Is., Bahamas
>
>  
>
> *Save the whales, collect the whole set.*
>
>  
>




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