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Roll
Roll or Rolls may refer to: Movement about the longitudinal axis * Roll angle (or roll rotation), one of the 3 angular degrees of freedom of any stiff body (for example a vehicle), describing motion about the longitudinal axis ** Roll (aviation), one of the aircraft principal axes of rotation of an aircraft (angle of tilt to the left or right measured from the longitudinal axis) ** Roll (ship motion), one of the ship motions' principal axes of rotation of a ship (angle of tilt to the port or starboard measured from the longitudinal axis) * Rolling ''manoeuvre'', a manoeuvre of any stiff body (for example a vehicle) around its roll axis: ** Roll, an aerobatic maneuver with an airplane, usually referring to an aileron roll, but sometimes instead a barrel roll, rudder roll or slow roll ** Kayak roll, a maneuver used to right a capsized kayak ** Roll program, an aerodynamic maneuver performed in a rocket launch * Roll rate (or roll velocity), the angular speed at which an aircraft ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barrel Roll
A barrel roll is an aerial maneuver in which an airplane makes a complete rotation on both its longitudinal and lateral axes, causing it to follow a helical path, approximately maintaining its original direction. It is sometimes described as a "combination of a loop and a roll". The g-force is kept positive (but not constant) on the object throughout the maneuver, commonly between 2 and 3''g'', and no less than 0.5''g''. The barrel roll is commonly confused with an aileron roll. Etymology The barrel roll is so named because an aircraft executing this maneuver looks as though it were flying with its wheels running around the inside wall of a cylinder, or an imaginary barrel lying on its side. A more common modern visualization is to imagine an airplane trying to fly in a horizontal corkscrew around the line of the direction of travel. Although the maneuver predates the name, the term was first used in 1917, gaining popularity during the early 1930s. Aviation In aviation, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudder Roll
A barrel roll is an aerial maneuver in which an airplane makes a complete rotation on both its longitudinal and lateral axes, causing it to follow a helical path, approximately maintaining its original direction. It is sometimes described as a "combination of a loop and a roll". The g-force is kept positive (but not constant) on the object throughout the maneuver, commonly between 2 and 3''g'', and no less than 0.5''g''. The barrel roll is commonly confused with an aileron roll. Etymology The barrel roll is so named because an aircraft executing this maneuver looks as though it were flying with its wheels running around the inside wall of a cylinder, or an imaginary barrel lying on its side. A more common modern visualization is to imagine an airplane trying to fly in a horizontal corkscrew around the line of the direction of travel. Although the maneuver predates the name, the term was first used in 1917, gaining popularity during the early 1930s. Aviation In aviation, the ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drum Roll
A drum roll (or roll for short) is a technique used by percussionists to produce a sustained sound for the duration of a written note.Cirone, Anthony J. (1991). Simple Steps to Snare Drum', p.30-31. Alfred. . "The purpose of the roll is to sustain the sound over the value of a written note." Types Snare drum roll A common snare drum roll is the closed roll. The closed concert roll (orchestral roll, buzz roll, or press roll) is performed by creating 3 (or more) equal sounding bounces on each hand alternating right to left, repeatedly and quickly. The aim of a closed roll is to reproduce the effect of a sustained note on an instrument which inherently produces a short, staccato sound. Because a multiple bounce stroke on a drum head loses energy, and volume, with each successive bounce, it is necessary to use special tactics and techniques to mitigate the loss of sound and cause the repeated notes to sound even. This involves the arm, the wrist, and the fingers. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll (food)
This is a list of rolled foods. Many types of rolled foods exist, including those in the forms of dishes, prepared foods, snacks and candies. Rolled foods See also * List of dumplings * List of stuffed dishes * Roll (other) Roll or Rolls may refer to: Movement about the longitudinal axis * Roll angle (or roll rotation), one of the 3 angular degrees of freedom of any stiff body (for example a vehicle), describing motion about the longitudinal axis ** Roll (aviation ... References {{Lists of prepared foods Rolled Foods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slow Roll (aeronautics)
A slow roll is a roll made by an airplane, in which the plane makes a complete rotation around its roll axis while keeping the aircraft flying a straight and level flightpath. A slow roll is performed more slowly than an aileron roll; although it is not necessarily performed very slowly, it is performed slowly enough to allow the pilot to maintain balance, keeping a steady flightpath, pitch angle (nose attitude), and height (altitude) throughout the maneuver. The maneuver is performed by rolling the airplane at a controlled rate with the ailerons, and moving the elevators and rudder in opposition, or "cross-controlling," to keep the plane on a steady, level flightpath. Introduction A slow roll is an aerobatic maneuver in which an airplane makes a controlled roll by rotating about its longitudinal axis. It is performed by rolling the aircraft at a constant rate, while manipulating the control surfaces to maintain level flight. The maneuver consists of quickly moving the aileron inp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banjo Roll
In bluegrass music, a banjo roll or roll is a pattern played by the banjo that uses a repeating eighth-note arpeggio – a broken chord – that by subdividing the beat 'keeps time'. "Each standard"roll pattern is a ''right hand'' fingering pattern, consisting of eight (eighth) notes, which can be played while holding ''any'' chord position with the left hand." "When used as back-up, the same pattern can be repeated over and over throughout an entire song, (...ith chord changesas required), or the roll patterns can be combined with one another and with ack-up licks.. The roll patterns can also be used to embellish the vamping style of back-up, especially when the chords are played high... These roll patterns can be used as back-up for any song played at any tempo." The banjo is commonly played in open tunings, such as open G (as are all of the examples): G'DGBD', allowing rolls to be practiced on all open strings (without fretting). Rolls are a distinguishing characteris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aileron Roll
The aileron roll is an aerobatic maneuver in which an aircraft does a full 360° revolution about its longitudinal axis. When executed properly, there is no appreciable change in altitude and the aircraft exits the maneuver on the same heading as it entered. This is commonly one of the first maneuvers taught in basic aerobatics courses. The aileron roll is commonly confused with a barrel roll. Execution The aileron roll is commonly executed through the application of full aileron in one direction. In some lower powered general aviation and aerobatic training aircraft, prior to applying aileron input, the pilot must begin the maneuver by trading altitude for airspeed (i.e. diving). This helps achieve enough airspeed to complete the roll without losing rudder and aileron control. The minimum airspeed needed depends on the aircraft's design, but is generally about 120 to 200 knots. Because full aileron is applied, structural limitations prevent many aircraft from performing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll Program
A roll program or tilt maneuver is an aerodynamic maneuver that alters the attitude of a vertically launched space launch vehicle. The maneuver is used to place the spacecraft on a proper heading toward its intended orbit. It often consists of a partial rotation around the vehicle's vertical axis ("roll") followed by tilting the vehicle ("pitch") to follow the proper gravity turn and/or to improve aerodynamics. A roll program is completed shortly after the vehicle clears the tower. In the case of a crewed mission, a crew member (usually the commander) reports the roll to the mission control center which is then acknowledged by the capsule communicator. ''ATLANTIS: "Houston, Atlantis. Roll program." Voice 1: "Roger roll, Atlantis". Saturn V The Saturn V's roll progr ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Music Roll
A music roll is a storage medium used to operate a mechanical musical instrument. They are used for the player piano, mechanical organ, electronic carillon and various types of orchestrion. The vast majority of music rolls are made of paper. Other materials that have been utilized include thin card (Imhof-system), thin sheet brass (Telektra-system), composite multi-layered electro-conductive aluminium and paper roll (Triste-system) and, in the modern era, thin plastic or PET film. The music data is stored by means of perforations. The mechanism of the instrument reads these as the roll unwinds, using a pneumatic, mechanical or electrical sensing device called a tracker bar, and the mechanism subsequently plays the instrument. After a roll is played, it is necessary for it to be rewound before it can be played again. This necessitates a break in a musical performance. To overcome this problem, some instruments were built with two player mechanisms (referred to as a duplex rol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll (aviation)
An aircraft in flight is free to rotate in three dimensions: '' yaw'', nose left or right about an axis running up and down; ''pitch'', nose up or down about an axis running from wing to wing; and ''roll'', rotation about an axis running from nose to tail. The axes are alternatively designated as ''vertical'', ''lateral'' (or ''transverse''), and ''longitudinal'' respectively. These axes move with the vehicle and rotate relative to the Earth along with the craft. These definitions were analogously applied to spacecraft when the first manned spacecraft were designed in the late 1950s. These rotations are produced by torques (or moments) about the principal axes. On an aircraft, these are intentionally produced by means of moving control surfaces, which vary the distribution of the net aerodynamic force about the vehicle's center of gravity. Elevators (moving flaps on the horizontal tail) produce pitch, a rudder on the vertical tail produces yaw, and ailerons (flaps on the win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll Angle
In physics, the degrees of freedom (DOF) of a mechanical system is the number of independent parameters that define its configuration or state. It is important in the analysis of systems of bodies in mechanical engineering, structural engineering, aerospace engineering, robotics, and other fields. The position of a single railcar (engine) moving along a track has one degree of freedom because the position of the car is defined by the distance along the track. A train of rigid cars connected by hinges to an engine still has only one degree of freedom because the positions of the cars behind the engine are constrained by the shape of the track. An automobile with highly stiff suspension can be considered to be a rigid body traveling on a plane (a flat, two-dimensional space). This body has three independent degrees of freedom consisting of two components of translation and one angle of rotation. Skidding or drifting is a good example of an automobile's three independent degre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gernot Roll
Gernot Roll (9 April 193912 November 2020) was a German cinematographer, film director and script writer. He collaborated on several films with directors Edgar Reitz and Sönke Wortmann. He was regarded as an expert on literary adaptations and film biographies, such as '' The Buddenbrooks'', filming Thomas Mann's novel in eleven television episodes directed by Franz Peter Wirth, and the same work again in 2008 in the film directed by Heinrich Breloer. Life Roll was born in Dresden and grew up in Pirna. At the age of 14 he began training as a cameraman and then worked at the DEFA Studios in Berlin-Babelsberg. His first film as a camera assistant was the fairy tale film ''The Singing Ringing Tree''. In 1960 he went to West Germany to work at Bavaria Film in Munich. He filmed literary works such as ', and television series such as '' Graf Yoster gibt sich die Ehre'' and ''Tatort''. From 1976, he worked as a freelance cinematographer. He was considered an expert in literary adapta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
