Propeller for boats and ships

Abstract

Abstract This invention relates to a propeller for boats and ships, and more particularly, to a propeller which produces a higher thrust for a given power input. The higher thrust and efficiency of the propeller is based on the fact that the water slip existing in present propellers has been totally eliminated. This kind of effect can be obtained when the propeller is constructed so that when viewed parallel to the axis all the blades (2) are tangent to each other, and in front elevation view the blades are located helically on the hub (1) so that there is a small gap (3) between the blades. The gaps enable water to flow between the blades so that each blade can function individually without interfering with the functioning of the other blades.

Inventors

• 👤 Jukka Kalevi Pohjola

Bibliographic Details