Re: Why no wingtips for B777???

Date:         08 Aug 97 05:41:16 
From:         David Lednicer <>
Organization: Analytical Methods, Inc.
References:   1 2 3 4 5
Followups:    1
Next article
View raw article
  or MIME structure

k_ish wrote:
> Winglets have nothing to do with handling or ride characteristics.

	Not true - winglets add to the effect of dihedral of a wing.  I
know of at least one airplane where winglets were added to increase
dihedral, with the drag improvement being only a secondary consideration.

	The original CL-600 Challenger wing/body configuration proved to
have excessive drag in flight test.  The winglets added to the CL-601
alleviated some of this.  The CRJ has a modifed wing that improves
things further and the Stretched CRJ will have additional changes to the
wing (including leading edge devices).

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