POLYWEDGE-CONICAL DEVICE TO REDUCE RESISTANCE Russian patent published in 1996 - IPC

FIELD: aviation, space technology, artillery, underwater and construction and erection equipment. SUBSTANCE: polywedge-conical device to reduce resistance incorporates body of revolution 1 carrying longitudinal wedge-shaped elements 4 and has bottom recess 7 in its base. Nose part of it has surface 2 in the form of circle of certain radius parallel to base. Side surface of body of revolution along zone of its crossing surface 2 parallel to base has groove 8 of specified depth. Each wedge-shaped element 4 is manufactured in the form of helical cyclic surface described in cylindrical system of coordinates by analytic dependence. EFFECT: expanded application field. 7 cl, 5 dwg