Takeoff
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Takeoff or take-off is the phase of flight during which an aerial vehicle leaves the ground and becomes airborne. For space vehicles that launch vertically, this is known as liftoff.
An F/A-18 taking off from an aircraft carrier
An Embraer E175 taking off
Three airliners taking off simultaneously (note similar pitch attitudes)
A Boeing 737-800 retracting its undercarriages during takeoff
V speeds
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In aviation, V-speeds are standard terms used to define airspeeds important or useful to the operation of all aircraft. These speeds are derived from data obtained by aircraft designers and manufactur
Takeoff
…applicable), and is provided to the flight crew as indicated airspeed. Operations with transport category aircraft employ the concept of the takeoff V-speeds: V1, VR and V2. These speeds are determined not only by the above factors affecting takeoff performance, but also by the length and slope of the runway…
A single-engined Cessna 150L's airspeed indicator indicating its V-speeds in knots