area rule


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area rule

[′er·ē·ə ‚rül]
(aerospace engineering)
A prescribed method of design for obtaining minimum zero-lift drag for a given aerodynamic configuration, such as a wing-body configuration, at a given speed.

area rule

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A prescribed method of design for obtaining minimum zero-lift drag for a given aerodynamic configuration, such as a wing-body configuration, at a given speed. For a transonic body, the area rule is applied by subtracting from, or adding to, its cross-sectional area distribution normal to the airstream at various stations so as to make its cross-sectional area distribution approach that of an ideal body of minimum drag. For a supersonic body, the sectional areas are frontal projections of areas intercepted by planes inclined at the Mach angle. In an aircraft, the cross-sectional area along the length of an aircraft should be kept as uniform as possible and with no abrupt changes. The cross section of the fuselage is reduced in the neighborhood of the wing root junction to compensate for the cross-sectional area of wings, with the consequent reduction of wave drag.
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The ball is in play once a goal kick is taken, and can be played by another player inside the area Rule change in
The Comelec on Saturday started to take down oversized posters and those that violated the common poster area rule.
She added that she wrote the poll body a letter to protest the inclusion of her name in the list of politicians who violated the common poster area rule. "We (lawmakers) should be the first in complying with the rules," she declared as she called on other candidates as well as her supporters to refrain from pasting posters on electric posts or hanging these on trees.
43934 (August 28, 2018), available at www.sec.gov/rules/sro/nysearca/2018/34-83904.pdf; Self-Regulatory Organizations; NYSE Area, Inc.; Order Disapproving a Proposed Rule Change Relating to Listing and Trading of the Direxion Daily Bitcoin Bear IX Shares, Direxion Daily Bitcoin 1.25X Bull Shares, Direxion Daily Bitcoin 1.5X Bull Shares, Direxion Daily Bitcoin 2X Bull Shares, and Direxion Daily Bitcoin 2X Bear Shares Under NYSE Area Rule 8.200-E, Exchange Act Release No.
Forest Service adopted a roadless area rule, (133) effectively
If you're the unlucky person who has to sit next to sticky-fingers' keyboard, talk to your boss and make sure that there's a clean desk/office area rule in place.
This maddening rush to sign established or promising domestic players has hit the IPL catchment area rule for a six, with one prominent team official describing the stipulation as a " mere tokenism".
Described as the most significant aerodynamic contributor of the second half of the 20th century, the NASA Langley engineer's major accomplishments include area rule fuselage and supercritical wing designs.
Called the area rule, it says that drag at high speeds is a function of an airplane's total cross-sectional area (essentially, the thickness of the fuselage).
Like the sector method, this approach involves deductive reasoning, and although refinement is again needed to make it a mathematically acceptable proof, it is a highly appropriate method to justify the circle area rule at this level.
A major milestone in aircraft design was reached in 1952 when Richard Whitcomb, an engineer at Langley Memorial Aeronautical Laboratory, discovered the aircraft design concept known as the area rule. This method reduced drag and increased speed without additional power.
Pupils will sit just eight GCSEs in Year 11, experience a longer school day, attend over four terms rather than three and the state-school catchment area rule is eschewed in favour of a North East-wide intake.