'Tractor biplane' definitions:

Definition of 'Tractor biplane'

From: GCIDE
  • Tractor screw \Tractor screw\ or Tractor propeller \Tractor propeller\ (Aviation) A propeller screw placed in front of the supporting planes of an airplane instead of behind them, so that it exerts a pull instead of a push. Hence,
  • Tractor monoplane,
  • Tractor biplane, etc. This is the most common arrangement for propellers on modern airplanes. [Webster 1913 Suppl.]