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onsisting of a screw placed in the stern under water, and made to revolve by an engine; a propeller wheel.

A propeller screw placed in front of the supporting planes of an aëroplane instead of behind them, so that it exerts a pull instead of a push. Hence, Tractor monoplane, Tractor biplane, etc.

ek philosopher; constructed on the principle of Archimedes' screw; as, Archimedean drill, propeller, etc. Archimedean screw, or Archimedes' screw, an instrument, said to have been invented by Archimedes, for raising water, formed by winding a flexible tube round a cylinder in the form of a screw. When the screw is plac…

nd an offender. -- To back water (Naut.), to reverse the action of the oars, paddles, or propeller, so as to force the boat or ship backward.

The broad part of an oar; also, one of the projecting arms of a screw propeller.

To serve as a clog or hindrance; to hold back. A propeller is said to drag when the sails urge the vessel faster than the revolutions of the screw can propel her. Russell.

(Naut.), the float or paddle of a feathering wheel. -- Feathering screw (Naut.), a screw propeller, of which the blades may be turned so as to move edgewise through the water when the vessel is moving under sail alone. -- Feathering wheel (Naut.), a paddle wheel whose floats turn automatically so as to dip about perp…

urner that gives a spreading flame shaped somewhat like the tail of a fish. -- Fish-tail propeller (Steamship), a propeller with a single blade that oscillates like the tail of a fish when swimming.

ific Coast] -- Hydraulic press, a hydrostatic press. See under Hydrostatic. -- Hydraulic propeller, a device for propelling ships by means of a stream of water ejected under water rearward from the ship. -- Hydraulic ram, a machine for raising water by means of the energy of the moving water of which a portion is to…

The sprue of a type, which is broken from it when the type is cold. Knight. Jet propeller (Naut.), a device for propelling vessels by means of a forcible jet of water ejected from the vessel, as by a centrifugal pump. -- Jet pump, a device in which a small jet of steam, air, water, or other fluid, in rapid motion, lif…

nickel, which greatly increases its strength. It is used for armor plate, bicycle tubing, propeller shafts, etc.

-- Paddle steamer, a steam vessel propelled by paddle wheels, in distinction from a screw propeller. -- Paddle wheel, the propelling wheel of a steam vessel, having paddles (or floats) on its circumference, and revolving in a vertical plane parallel to the vessel's length.

complete turn of the thread of a screw, or of the helical lines of the blades of a screw propeller.

Specifically, of horse: To move rapidly in a gait in which each leg acts in turn as a propeller and a supporter, and in which for an instant all the limbs are gathered in the air under the body. Stillman (The Horse in Motion).

s having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below.

alley (Naut.), a passage extending from the engine room to the stern, and containing the propeller shaft. -- Shaft furnace (Metal.), a furnace, in the form of a chimney, which is charged at the top and tapped at the bottom.

the velocity, relatively to still water, of the backward current of water produced by the propeller.

A design of motor-boat stern, for use in shallow waters, in which the propeller is housed in a tunnel and does not extend below the greatest draft.

ar fixture of any form moved in or by water, air, or other fluid; as, the vane of a screw propeller, a fan blower, an anemometer, etc.

A screw propeller.