 2 were experimental aircraft built and flown in France in the early twentieth century by Robert Esnault-Pelterie.These aircraft are historically significant because they were the first to employ a joystick as their main flight control.The REP 1 was a single-seat tractor configuration monoplane powered by a seven-cylinder two-row semi-radial engine driving a four-bladed propeller with aluminium blades rivetted to steel tubes.