An airplane has to reach a certain speed (which varies depending on aircraft type and gross weight) before it can take off,
There are 7 main stages involved with take off in commercial airliner.
1) Checks - when the aircraft has had its IFR and take off clearence from Air traffic control, the pilots must do a series of brief checks, such as flap configuration, APU setting, landing lights and autopilot, After these are done the aircraft will taxi onto the runway.
2) Power up - At this point the throttles will be advanced and the tubines will power up and the aircraft will start accelerating
3) Final check - The pilots will look at their speed gauges, They should be "alive" and displaying increasing numbers by now
4) V1- The "V1" speed is the speed that the aircraft can no longer stop with the amount of runway it has left and must take off no matter what happends.
5) Rotate - This comes about 2 seconds after V1 is called, When the captain says outloud "Rotate"! the first officer will pull back on the yoke or sidestick and the aircraft will pitch up and lift into the air, increasing in speed and pitch angle until both of the desired are reached
6) V2- This is the speed that the aircraft can safley continue the takeoff if an enjine fails, it is usually called about 2 seconds after rotate.
7) Positive rate- This happends about 40 ft off the ground and is usually around 3 seconds after the aircraft has become airbourne, This simply means that the aircraft is climbing and the alitmiters are correctly working, At this point the crew will raise the landing gear, and raise the flaps 1 stage.
This is what the conversation should look like at take off with a functioning crew
(key)
Atc = air traffic control
fo= first officer
cpt=captain
fo: Heathrow tower,Virgin 332 at runway 27 left has received IFR clearence with delta for departure to the east for KORD, Requesting take off IFR over
(that was the first officer asking for clearence from air traffic control, the capatin would be doing the pre takeoff checks while the first officer does this)
atc: Virgin 332 cleared for take off runway 27 left, climb and maintain 4000, remain on runway heading until you have contacted the controller on the departure frequency, good day sir.
fo: Virgin 332 cleared for take off runway 27 left, good day (this must be repeated so the controller is sure the pilots have understood the clearence.
Capt: all checks complete, power up
fo: power to 70%
capt: Airspeed indicators checked
fo: checked
capt: V1!
capt: Rotate!
capt: V2!
capt: positive rate
fo: gear up
capt: gear up and locked, retract flaps to 2 degrees
There is much more involved than this however this is the basics of the process
only 2000 planes take off
Float planes.
There are between 40000 to 50000 planes that take off each day.
As Planes Take Off - 2008 was released on: USA: 5 November 2008 (limited)
No because the air around the plane has pressure. If two planes take off at the same time the planes will crash. The planes might crash if they land at the same time.
The planes take-off with a catipulte but they have to be light planes nothing to heavy. Then the plane goes into full throtle flaps up then takes-off
No.
Runway
Most aircraft passenger jets take off at 138 knots
Sea planes, Flying Boats, Pontoon Planes, PBY's (Don't know what that stands for).
The lift required to get the plane off the ground is created by the flow of the air over the planes wings.
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