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Lift is always accompanied by a drag force, which is the component of the surface force parallel to the flow direction. Lift is mostly associated with the wings of fixed-wing aircraft , although it is more widely generated by many other streamlined bodies such as propellers , kites , helicopter rotors , racing car wings , maritime sails , wind ...
The lift coefficient C L is defined by [2] [3] = =, where is the lift force, is the relevant surface area and is the fluid dynamic pressure, in turn linked to the fluid density, and to the flow speed.
Unimog 405/UGN on a lift table World War 2 American ground crew using a lift table to load a bomb onto a B-17 bomber. Lift tables can come in a vast array of configurations and can be built to suit various highly specialized industrial processes. For instance, they are often customized for integration into production lines, packaging systems ...
For example, a pitching moment comes from a force applied at a distance forward or aft of the cg, causing the aircraft to pitch up or down. A fixed-wing aircraft increases or decreases the lift generated by the wings when it pitches nose up or down by increasing or decreasing the angle of attack (AOA). The roll angle is also known as bank angle ...
This diagram shows lift as perpendicular to the longitudinal body axis. In most technical usage, lift is perpendicular to the oncoming flow. That is, perpendicular to the longitudinal stability axis. At low angles of attack, the lift is generated primarily by the wings, fins and the nose region of the body.
In stasis, heeling moment from the wind and righting moment from the boat's heel force (F H) and its opposing hydrodynamic lift force on hull (F l), separated by a distance (h = "heeling arm"), versus its hydrostatic displacement weight (W) and its opposing buoyancy force (Δ), separated by a distance (b = "righting arm") are in balance: [8]
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