Re: Leading Edge fences

Date:         01 Oct 97 14:08:45 
From:         David Lednicer <>
Organization: Analytical Methods, Inc.
References:   1 2 3 4 5
Followups:    1
Next article
View raw article
  or MIME structure

Howard Jones wrote:
> an english aerodynamicist, dieter keusner(sp?) used something like this
> nicknamed Keusner's Carrots (seriously) to squeeze and invigorate the airflow
> to overcome a problem on an english jet. they may be doing more than just
> housing the tracks.

	Its Kuchemann, and he was actually a German who was brought to the
UK after WWII and stayed on until he died in 1976.  The Kuchemann Carrots
were used on the Convair 990.  He idea was to fill out the area
distribution and reduce the wave drag.  However, their skin friction
drag balanced out the wave drag reduction and they ended up having no
effect. Additionally, they were too far aft to carry fuel, so they never
had anything in them.

	Dieter Kuchemann is generally regarded as one of the GREAT
aerodynamicists, along with Ludwig Prandtl, R.T. Jones, Teddy
Theodorsen, Theodore von Karman, etc.

David Lednicer             | "Applied Computational Fluid Dynamics"
Analytical Methods, Inc.   |   email:
2133 152nd Ave NE          |   tel:     (206) 643-9090
Redmond, WA  98052  USA    |   fax:     (206) 746-1299