If you pull a stunt like that these days, you're likely to get kicked off the plane [

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I believe the answer is that it does, just not enough that you will notice.

An aircraft will require about 1.6 km to achieve a takeoff speed of 250 km/h, or 69 m/s.

v^2 = u^2 + 2as - the initial speed u is zero, so v^2 = 2as.

From that it follows that a (the acceleration) is v^2/2s (v is the final speed and s is the distance travelled)

So, a=69*69/2/1600, which comes to 1.48 m/s/s.

1g is 9.81 m/s/s so the the plane is only accelerating at 0.15g (average).

The object will not come straight down relative to you, but you'll hardly notice the angle because the acceleration of the plane is small relative to the acceleration produced by the Earth's gravitational field.