·add. ·- A propeller screw placed in front of the supporting planes of an aeroplane instead of behind them, so that it exerts a pull instead of a push. Hence, Tractor monoplane, Tractor biplane, ·etc.
·noun That which draws, or is used for drawing. II. Tractor ·add. ·noun An aeroplane flying machine...
Webster's Dictionary of the English Language
·noun One who, or that which, propels. II. Propeller ·noun A steamboat thus propelled; a screw stea...
This term generally alludes to the Archimedean screw, or screw-propeller. ...
The Sailor's Word-Book
·add. ·- ·Alt. of Tractor propeller. ...
A valuable substitute for the cumbersome paddle-wheels as a motive-power for steam-vessels: the Arch...
See screw-propeller. ...