screw propeller


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

screw propeller

[′skrü prə‚pel·ər]
(mechanical engineering)
A marine and airplane propeller consisting of a streamlined hub attached outboard to a rotating engine shaft on which are mounted two to six blades; the blades form helicoidal surfaces in such a way as to advance along the axis about which they revolve.
References in periodicals archive ?
The flow produced by the screw propeller and caused by the effect of the stern screw of the propeller usually is not taken into account in many cases; however, this effect could have a considerable influence on the force of tug pulling.
Therefore the outboard water around a screw propeller, where the cavitation reaches the highest level, is mostly suitable for cooling the surface of marine motors and using in sea water distillation equipment.
Instead of the usual screw propellers you find on boats or underwater vehicles, Finnegan has four flippers, known to engineers as flapping foils, that roll and twist through the water.
The advantage of using the NeuroSolutions NN to predict the optimum ship screw propeller is the processing speed, once the database requested for training is prepared.
His revolutionary iron ship, Great Britain, of 1843, the first major ship powered by a screw propeller sailed from Liverpool to the US and carried a total of 15,000 emigrants to Australia.
Although the steamship was first developed early in the 19th century, further innovations in subsequent decades--the screw propeller, steel hulls, the compound engine--transformed what had been primarily a river vessel into cheap and reliable ocean transport.