Why mass aircraft tons can float in the air? Bernoulli's principle can provide an answer to this question. Bernoulli's principle is a principle of physics associated with the fluid, especially a moving fluid. Bernoulli's principle widely used in many technological applications, such as the principle of the aircraft. Mathematically, Bernoulli's principle is expressed by the equation:

RV2 ½ p + r + g y = constant (fixed)

p = pressure of the fluid, r = density of fluid, v = rate of fluid, y = height increased fluid, and g = acceleration due to gravity.

If the fluid flow is not raised then the value of y = 0 at each point, so the above equation becomes much simpler, namely:

RV2 ½ p + = constant (fixed)

This equation states that if the fluid flow rate increases, the pressure of the fluid in that place becomes smaller, and vice versa. Hence, a winged aircraft can climb to the sky, because the air pressure at the top of the wing is less than the air pressure at the bottom of the wing. Why does this happen?

RV2 ½ p + r + g y = constant (fixed)

p = pressure of the fluid, r = density of fluid, v = rate of fluid, y = height increased fluid, and g = acceleration due to gravity.

If the fluid flow is not raised then the value of y = 0 at each point, so the above equation becomes much simpler, namely:

RV2 ½ p + = constant (fixed)

This equation states that if the fluid flow rate increases, the pressure of the fluid in that place becomes smaller, and vice versa. Hence, a winged aircraft can climb to the sky, because the air pressure at the top of the wing is less than the air pressure at the bottom of the wing. Why does this happen?

The upper part of the wing is made more curved than the bottom wing. It is caused when the aircraft was moved to the front, the air flow rate at the top of the wing will be faster than the rate of air flow at the bottom of the plane, because the travel time (t) of air flow on both the same and the length of the track (s) through the air at the top is longer than the length of the trajectory in the plane (remember v = s / t). As a result of the rate of air at the top of the wing faster than the rate of air at the bottom of the wing, the air pressure at the top is smaller than the air pressure at the bottom of the wing. As a result of the pressure difference is the wing aircraft will be lifted by the upward force (remember, this is not the buoyant force).