Angle of attack

In fluid dynamics, angle of attack (AOA, or (Greek letter alpha)) is the angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is moving. Angle of attack is the angle between the body's reference line and the oncoming flow. This article focuses on the most common application, the angle of attack of a wing or airfoil moving through air.

In aerodynamics, angle of attack specifies the angle between the chord line of the wing of a fixed-wing aircraft and the vector representing the relative motion between the aircraft and the atmosphere. Since a wing can have twist, a chord line of the whole wing may not be definable, so an alternate reference line is simply defined. Often, the chord line of the root of the wing is chosen as the reference line. Another choice is to use a horizontal line on the fuselage as the reference line (and also as the longitudinal axis). Some authors do not use an arbitrary chord line, but use the zero lift axis instead — zero angle of attack corresponds to zero coefficient of lift.

Attack

Attack may refer to:

Films

Albums

Songs

Bands

Ships

Angle

In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in a plane, but this plane does not have to be a Euclidean plane. Angles are also formed by the intersection of two planes in Euclidean and other spaces. These are called dihedral angles. Angles formed by the intersection of two curves in a plane are defined as the angle determined by the tangent rays at the point of intersection. Similar statements hold in space, for example, the spherical angle formed by two great circles on a sphere is the dihedral angle between the planes determined by the great circles.

Angle is also used to designate the measure of an angle or of a rotation. This measure is the ratio of the length of a circular arc to its radius. In the case of a geometric angle, the arc is centered at the vertex and delimited by the sides. In the case of a rotation, the arc is centered at the center of the rotation and delimited by any other point and its image by the rotation.

My Way

"My Way" is a song popularized by Frank Sinatra. Its lyrics were written by Paul Anka and set to music based on the French song "Comme d'habitude" co-composed, co-written and performed in 1967 by Claude François. Anka's English lyrics are unrelated to the original French song.

Background

Paul Anka heard the original 1967 French pop song, Comme d'habitude (As Usual) performed by Claude François, while on holiday in the south of France. He flew to Paris to negotiate the rights to the song. In a 2007 interview, he said, "I thought it was a bad record, but there was something in it." He acquired adaptation, recording, and publishing rights for the mere nominal or formal consideration of one dollar, subject to the provision that the melody's composers would retain their original share of royalty rights with respect to whatever versions Anka or his designates created or produced. Some time later, Anka had a dinner in Florida with Frank Sinatra and "a couple of Mob guys" during which Sinatra said "I'm quitting the business. I'm sick of it; I'm getting the hell out."