Patent Number: 6,297,486

Title: Base drag reducing device

Abstract: A device for reducing base drag on cylindrical rear truncated objects moving in a fluid, caused by the shedding of vortices at the base of the object. The device consists of ring shaped winglets attached to the rear of the object which may be sub-divided into a plurality of hinged partial winglets. The parameters of distance of winglet from cylinder shaped object, winglet circumference, angle, profile and chord length may be varied automatically for optimum drag-reducing capability.

Inventors: Rom; Hanan (Misgav, IL), Weinberg; Zvi (Haifa, IL)

Assignee: Rafael Armament Development Authority Ltd.

International Classification: F42B 10/44 (20060101); F42B 10/00 (20060101); F42B 010/34 ()

Expiration Date: 10/02/2018