Definition EN: on some installations a lanyard connected to the parachute ripcord handle which ensures that the parachute deploys with zero time lag after separation.Used for flight below about 3000 m(10.OOO ft)

Definition EN: the legitimate use of a public transport system without fare payment required

Definition ES: uso legítimo de un sistema de transporte público sin necesidad de pagar billete

Definition EN: a launcher which supports a missile in position at a number of discrete points from which it can be released simultaneously when the build-up of thrust is sufficient to ensure an effective launch

Definition EN: angle of attack at which aerofoil generates neither positive nor negative lift

Definition EN: a line through the trailing edge of an aerofoil section parallel to the direction of the relative airstream when the lift is zero

Definition EN: device which disposes of a graduated scale with zero value in the middle of it,showing positive and negative values as well

Definition EN: the distance a propeller would advance in one revolution so as to deliver no thrust

Definition EN: act of restoring airframe or engine to new condition so that flight-time count may legally be restarted

Definition EN: angle of attack at which aerofoil generates neither positive nor negative lift

Definition EN: a fare structure in which the cost of a trip is a function of the length of the trip,measured in terms of defined zones

Definition ES: estructura tarifaria en la cual el coste de un viaje depende de la longitud del mismo, medido en términos de zonas definidas

Definition EN: graphical representation of the fare zones of a transit system

Definition ES: representación gráfica de las distintas zonas de tarifas de un sistema de transporte

Definition EN: utilizing kinetic energy to gain height