Flight dynamics

Flight dynamics is the study of the performance, stability, and control of vehicles flying through the air or in outer space. It is concerned with how forces acting on the vehicle influence its speed and attitude with respect to time.

In fixed-wing aircraft, the changing orientation of the vehicle with respect to the local air flow is represented by two critical parameters, angle of attack ("alpha") and angle of sideslip ("beta"). These angles describe the vector direction of airspeed, important because it is the principal source of modulations in the aerodynamic forces and moments applied to the aircraft.

Spacecraft flight dynamics involve three forces: propulsive (rocket engine), gravitational, and lift and drag (when traveling through the earths or any other celestial atmosphere). Because aerodynamic forces involved with spacecraft flight are very small, this leaves gravity as the dominant force.

Aircraft and spacecraft share a critical interest in their orientation with respect to the earth horizon and heading, and this is represented by another set of angles, "yaw," "pitch" and "roll" which angles match their colloquial meaning, but also have formal definition as an Euler sequence. These angles are the product of the rotational equations of motion, where orientation responds to torque, just as the velocity of a vehicle responds to forces. For all flight vehicles, these two sets of dynamics, rotational and translational, operate simultaneously and in a coupled fashion to evolve the vehicle's state (orientation and velocity) trajectory.

List auf Sylt

List auf Sylt (known as List until 31 December 2008) is the northernmost municipality in Germany, located on the North Sea island of Sylt close to Denmark in the district of Nordfriesland in the state of Schleswig-Holstein.

Etymology

List derived from the Middle Low German Liste (ledge, bar or edge).

History

List was originally a Danish settlement. It was first mentioned in 1292 (Lystum). The original village was destroyed by the great flood of 1364. The settlement was rebuilt further east from the previous location. In the mid-15th century, a church named St. Jürgen was mentioned. In a treaty of 1460, Schleswig and Holstein were linked to the Danish crown, but List remained part of the royal enclaves, small areas of the Kingdom of Denmark situated within the Duchy of Schleswig, but directly controlled by the Danish king.

From the 16th century, the people of List mostly made a living from Oyster farming, raising sheep and collecting and selling gull eggs. At the time, List was an important protective anchorage. In 1644, a Swedish-Dutch fleet of 26 ships commanded by Admiral Thijssen was attacked in the Lister Tief and defeated by Danish ships commanded by king Christian IV of Denmark. The anchorage north of today's town was named Königshafen to honour this event.

Mars (Philippine TV series)

Mars stylized as MARS is the female talk show of GMA News TV which airs in the Philippines. It is aired every Weeknights at 7:10-8:00 PM (PST). It is hosted by actress Camille Prats and Unang Hirit host Suzi Abrera.

Host

Segments

See also

Lambic

Lambic is a type of beer traditionally brewed in the Pajottenland region of Belgium (southwest of Brussels) and in Brussels itself at the Cantillon Brewery and museum. Lambic is now mainly consumed after refermentation, resulting in derived beers such as Gueuze or Kriek lambic.

Unlike conventional beers, which are fermented by carefully cultivated strains of brewer's yeasts, lambic is produced by spontaneous fermentation: it is exposed to the wild yeasts and bacteria that are said to be native to the Zenne valley, in which Brussels lies. It is this unusual process which gives the beer its distinctive flavour: dry, vinous, and cidery, usually with a sour aftertaste.

Lambic beer is widely consumed in Brussels and environs, and frequently featured as an ingredient in Belgian cuisine.

Etymology

The name "lambic" entered English via French, but comes from the Dutch language. Lambic is probably derived from the name "Lembeek", referring to the municipality of Lembeek near Halle, close to Brussels.

Mars, Incorporated

Mars, Incorporated is an American global manufacturer of confectionery, pet food, and other food products with US$ 33 billion in annual sales in 2015, and is ranked as the 7th largest privately held company in the United States by Forbes. Headquartered in McLean, unincorporated Fairfax County, Virginia, US, the company is entirely owned by the Mars family. Mars operates in six business segments around the World: Chocolate (Hackettstown, New Jersey), Petcare (Brussels, Belgium), Wm. Wrigley Jr. Company (Chicago, Illinois), Food (Rancho Dominguez, California), Drinks (West Chester, Pennsylvania), and Symbioscience (Germantown, Maryland), the company's life sciences division.

History

Mars, founded by Franklin Clarence Mars, is a company known for the confectionery items that it creates, such as Mars bars, Milky Way bars, M&M's, Skittles, Snickers, and Twix. They also produce non-confectionery snacks, such as Combos, and other foods, including Uncle Ben's Rice and pasta sauce brand Dolmio, as well as pet foods, such as Pedigree and Whiskas brands.

Mountain

A mountain is a large landform that stretches above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill. Mountains are formed through tectonic forces or volcanism. These forces can locally raise the surface of the earth. Mountains erode slowly through the action of rivers, weather conditions, and glaciers. A few mountains are isolated summits, but most occur in huge mountain ranges.

High elevations on mountains produce colder climates than at sea level. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and climate, mountains tend to be used less for agriculture and more for resource extraction and recreation, such as mountain climbing.

The highest mountain on Earth is Mount Everest in the Himalayas of Asia, whose summit is 8,850 m (29,035 ft) above mean sea level. The highest known mountain on any planet in the Solar System is Olympus Mons on Mars at 21,171 m (69,459 ft).

Mountains (Lonestar song)

"Mountains" is a song written by Richie McDonald, Larry Boone and Paul Nelson, and recorded by American country music band Lonestar. It was released in June 2006 as the lead-off single and title track from their album of the same name. The song is the band's final Top Ten hit, reaching a peak of number 10 on the U.S. country singles charts in late 2006.

Content

"Mountains" is a mid-tempo in which the narrator cites two examples of people who overcome difficult situations in their lives. The first is a single mother who has to work two jobs to support her family, and the second is a man with crippled legs who runs a marathon despite the pain he feels. In both situations, the narrator uses mountains as a metaphor for the struggles each person faces.

Music video

The music video was filmed partially west of Denver, Colorado (where the band played), and was directed by Kristin Barlowe.

Chart performance

Year-end charts

References

External links