A new screw propeller with higher efficiency than a conventional state-of-the-art propeller.
The principal fore-and-aft component of ship framing, located along the centreline of the bottom and connected...
Heavy wooden or concrete blocks on which ship rests during construction or repair.
A long hollow, square section forging which screws into the top section of a drill pipe. It is driven by the rotary...
A machined metal bar which is used to connect a component to a shaft.
Keyless bore propellers are press fitted on the shaft cone. Oil is injected under pressure between the bore and...
The groove or slot in which a key fits. It must be carefully designed to avoid weakening of the shaft or creating...
The absolute viscosity of a fluid divided by its density at the temperature of viscosity measurement.
A conical valve, opening outward, to close the mouth of a pipe which passes through the side of a vessel below...
Knocking in spark-ignition engines occurs when the fuel-air mixture spontaneously and violently ignites ahead of...
A unit of speed, equal to one nautical mile (6,076 feet or 1852 meters) per hour. In the days of sail, speed was...
An abrupt change in direction of plating, frames, keel, deck, or other structure of a ship.
A fixed, annular forward extending duct around the propeller. The propeller operates with a small gap between blade...
Developed and patented by Ton Kooren, the president of Dutch Towage Company KOTUG, the Rotor Tug represents a new...