The smoothness is a characteristic aerodynamic. It is often referred to as Anglo-Saxon 'L / D ratio' (L to lift (lift) and drag D (drag)). The fineness of a heavier fixed-wing is the ratio, at a given speed, between its lift and drag. It is the ratio between the horizontal distance traveled and the drop at constant speed and without propulsion, in still air, or the ratio of the horizontal velocity and vertical velocity (sink rate). For a heavier given fineness varies depending on the incidence of the wing. However, as the lift coefficient also varies with incidence angle, for an equivalent lift the weight, we must adapt speed. Therefore the sharpness varies with speed. This curve represents the rate of fall depending on the speed trajectory (or airspeed). It is growing between the value of the stall until the value of the speed of best glide ratio, then decreases beyond. The air finesse of an aircraft is given in relation to the mass of air in which it moves. It is often that the manufacturer claims that because it is independent of the wind. The fineness ground, it is calculated from the ground (often the most interesting is that which determines if a path to a goal is possible or not). This fine must reflect the movement of air (wind) from the ground. When the aircraft is moving in the direction and the wind blows the fine soil increases and vice versa. Strong wind from the front, the aircraft may have a ground speed and finesse low or negative ground, which is also often a sufficient reason to cancel the flight. Copyright Text is available under Creative Commons Attribution Share-Alike, other conditions may apply. See Terms of Use for more details and credits graphics. If reused texts of this page, see how to cite authors and include the license. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc.., Charitable organization governed by section 501 (c) (3) tax United States.

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