Quote:
Originally Posted by ted
On a curved runway I'd like to see the side loads on a 747 heavy jet trying to stay in the circle.
As it struggled to get airborne from V1 to V2 for several hundred feet with the nose wheel off the ground.  |
Graduated banking, the side loads remains neutral. As velocity increases, the air craft floats up to steeper banking.
By tuning the steepest part of the banking to the take off speed of a fully loaded air craft on a humid low pressure hot day, there is no need for the aircraft to run several hundred feet with just the nose wheel off the ground. Once the take velocity of the air craft requires steering input to stay in the circle, the aircraft is already at or over take off speed.
The banking is providing a vertical load that is counter acting the lift of the aircraft, the vertical load exceeds 1G, and the wings are providing negative >1G perpendicular to the banking, but not in the vertical axis.
With take off velocity in hand, the pilot either exceeds the velocity the banking holds the air plane neutral, or steers slightly up the banking. Since the banking would gradually diminish past its highest banking, the air plane levels out, the vertical load reduces, the lift > load causes the air plane to fly as it levels.