An airplane can change direction in three ways because it is free in the air. An automobile can change direction to the right or left, and this corresponds to an airplane yawing left or right. The automobile cannot decide to go down or up like an airplane can because it is on solid ground. This down or up change of direction is called pitch. A car also has wheels only on the bottom, and cannot travel on its roof or on one side. An airplane, however, can fly upside down, or on its side just as well as right side up and changing the position of the plane in this way is called roll. A roll is a technique in an airplane where the plane turns upside down then keeps going until it is rightside up again. Roll on an airplane is controlled by the ailerons (the little flaps on the wings).
If you mean principal palne, it is th e plane of a member where its tension stress is maximum and shear stress zero ( principal stress). It is the highest stress and is often used to compute failure against tensile allowable. Failure will generally occur in the direction of that plane.
Ro Ro is a "Roll On, Roll Off Vessel"
It depends on the size of the roll,
Usually not, but it depends on the context, I mean what kind of stack are you talking about. For example in FORTH language word PICK and ROLL could be used.
Well when you say boeing i'm guessing you mean the plane and yes the boeing defiantly relies on natural resources for example the plane is made out of metal which is a natural resource also the fuel it runs on is fossil fuel which is also a natural resource.
help the plane roll
Roll is the movement of the aircraft around it's longitudinal axis, this is a line from the nose to the tail.
Roll out means to roll out...dudee
The more inclined the plane, the more momentum an object will gain while going down it.
An inclined plane
Tow plane ready
It means to roll the plane left or right. A "roll" is when the pilot moves the ailerons so that one wing drops down and the other wing rises. This usually is done to initiate a turn but it can be performed while maintaining a straight line of flight.
Don't you mean who MADE Tootsie Roll? And if that's what you mean, its Leo Hirshfield.
To nearly its original high
It means to take a chance, roll the dice.
when you roll down a hill in your dance routine
I think you mean a blog roll, a blog roll is a page where it shows all your followers