V1

V1 is computed for the day's weight, runway length, slope, surface and weather. Below it there is enough runway left to stop; above it there is not, so the aircraft goes flying and deals with the failure in the air. It is called out loud by the pilot monitoring, which is why it turns up in cockpit recordings and in aviation shorthand generally.

Nearby in Aviation

• transponder — An onboard radio that replies to radar interrogation with the aircraft's code and, usually, its altitude.
• turboprop — An aircraft whose propeller is driven by a gas turbine through a reduction gearbox.
• V2 — The takeoff safety speed — the minimum speed to be held on the initial climb after an engine failure.
• visual approach — An approach flown by reference to the runway and terrain rather than by following an instrument procedure.