A take-off director system provides the pilot with a visual display on a flight director indicator of the aircraft acceleration required to reach V.sub.1 speed within a length of runway calculated so that upon take-off abort the pilot will yet be able to stop the aircraft on the remaining runway; if...http://www.google.es/patents/US4251868?utm_source=gb-gplus-sharePatente US4251868 - Take-off director system
