Definition of Takeoff Decision Speed (V1)
Takeoff Decision Speed (V1) is a calibrated airspeed that represents the minimum speed at which the pilot of an aircraft can make a safe decision to either continue or discontinue a takeoff in the event of an engine failure or other critical malfunction. This speed is determined in accordance with 14 CFR section 23.51 and is calculated based on various factors, such as aircraft weight, runway conditions, wind, and altitude. At V1, the pilots must commit to taking off and continuing the takeoff roll even if an engine fails, as it is unlikely that the aircraft can be stopped on the remaining runway. On the other hand, if an issue arises before V1, pilots can abort the takeoff and stop the aircraft safely. Having an accurate knowledge of V1 is critical for determining the safe takeoff and departure of an aircraft. Thus, V1 is an essential component of an aircraft’s pre-flight operations and is regularly reviewed and updated to ensure safe and successful takeoffs.
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