초록 ▼

A propeller (18) having an exhaust discharge passage (22) through the propeller hub has blades (24) symmetrical in thickness about the nose-tail pitch line and symmetrical in plan form about a rake line (26). The propeller (18) is particularly effective to increase reverse thrust when used with an o

A propeller (18) having an exhaust discharge passage (22) through the propeller hub has blades (24) symmetrical in thickness about the nose-tail pitch line and symmetrical in plan form about a rake line (26). The propeller (18) is particularly effective to increase reverse thrust when used with an outboard drive unit (10) having exhaust gas relief passages (27).

대표청구항 ▼

A marine propeller comprising a hub having an exhaust gas discharge opening at the aft end thereof and a plurality of blades extending from said hub forwardly of said opening, said blades each having a thickness radially symmetrical about a rake line, a plan form symmetrical about said rake line, a

A marine propeller comprising a hub having an exhaust gas discharge opening at the aft end thereof and a plurality of blades extending from said hub forwardly of said opening, said blades each having a thickness radially symmetrical about a rake line, a plan form symmetrical about said rake line, a maximum thickness at said rake line, rounded leading edges and the same surface blade rake on both the fore and aft faces of said blades.