propellers, over the more conventional rudder propellers. The STP is a 360-degree steerable propulsion unit which has two similarly-sized propellers, both mounted on a single shaft and rotate in ...

Captain Ericsson obtained the patent for his propeller in 1837 ; it differed from that of Perkins in being submerged and placed behind the rudder. In conjunction with his propeller Capt.

Thordon Bearings has delivered COMPAC water-lubricated propeller shaft and SXL rudder bearings to replace oil- and grease- lubricated bearings onboard McKeil Marine’s bulk carrier Northern ...