Your last question, made me think about a glider.
When you pull a glider with another airplane, there is no "thrust" as such, nor vertical component of the same (it is pulled forward and normally it lifts off befor the pulling airplane)
In that case, YES the lift overcomes the weight of the same
On the same principle, on your A320, you use the thrust to accelerate along the runway... imagine an infinite runway and no speed limitation, your aicraft will be lifting off in a flat attitude just because at that speed, the lift is bigger than the weight.
What you do at "rotation" is changing your Cp (and thus your lift, considering the same speed), not rotating the thrust vector upwards
The thrust vector is there, indeed, but its effect is playing a negligible effect on the vertical axis
Last edited by Tiennetti; 29th October 2012 at 10:51.