Differs in every aircraft but mostly around 160kias.
The Harrier can take off vertically.
speeds depend on the weather condition and how long the runway is but usally a 747 takes off at 150-154 knots.
An Airbus 320 is taking off at arround 120 Knots to 160 Knots depending on weight, runway, runway condition, MET conditions. The speed above is equal to most commercial aircrafts nowadays. Cristian from Argentina
280kmph.
to take off the the aircraft which is operated at a specific speed on the runway
The departure actually take off when it taxi's the runway so you have enough speed to lift off.
35 knots
A harrier is a jump jet- it can take off straight up and land straight down or make a really short take off or landing on a runway. It cant hold a lot of fuel so it can fly for too long.
A standard 737 will take off (rotate) at approximatly 140 knots. Take off speed depends on wind speed temperature and weight etc
A Scram jet is a jet which needs supersonic propulsion to take off. It is taken into air by another larger aircraft and is released in supersonic speed.
a runway
Nit all need a runway as we know it. Some can take off on grass of compacted earth. when referring to hard runways its because of the weight of the aircraft using it, the requirement to have a flat, tripping surface to get to speed in a short time