Youngs Laminar Bodies

[sorenfdk]

Hello everybody,

In his excellent book "Model Aircraft Aerodynamics", Martin Simons mentions a family of so-called laminar bodies, designed by someone named Young. I thought these shapes would be good for keelbulbs, and have searched the web for further information, but to no avail.

If You have any information - relevant URLs, books, papers, anything, please let me know!

Kind regards,
Søren Flening

[Unregistered]

Laminar flow is enhanced by certain parameters of shape which are pretty well known, mainly maintaining a positive pressure gradient as far aft as possible. However, boat Reynolds numbers are frequently too high to derive significant benefit from laminar flow.

A keel bulb operating in the right flow parameters should probably be as laminar as possible, but it's a pretty simple matter to do so. Horner, Abbot, or many other standard fluid dymanics texts have simple explanations, and VS Aero can do it in a computer.

[nico]

I believe it could be:
A. D. Young. The calculation of total and skin friction drags of
bodies of revolution at zero incidence. ARC R&M No. 1874
(1939).
I havent found it anywhere.

[sorenfdk]

Thanks to both of You!
I was wondering, isn't there anyone out there with practical experience with these shapes?

Søren Flening