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Jet Blast
Jet blast is the phenomenon of rapid air movement produced by the jet engines of aircraft, particularly on or before takeoff. A large jet-engined aircraft can produce winds of up to as far away as behind it at 40% maximum rated power. Jet blast can be a hazard to people or other unsecured objects behind the aircraft, and is capable of flattening buildings and destroying vehicles. Despite the power and potentially destructive nature of jet blast, there are relatively few jet blast incidents. Due to the invisible nature of jet blast and the aerodynamic properties of light aircraft, light aircraft moving about airports are particularly vulnerable. Pilots of light aircraft frequently stay off to the side of the runway, rather than follow in the centre, to negate the effect of the blast. Propeller planes are also capable of generating significant rearwards winds, known as prop wash. Maho Beach in Sint Maarten is famous for its unique proximity to the runway of Princess Julia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Engine
A jet engine is a type of reaction engine discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition can include rocket, Pump-jet, water jet, and hybrid propulsion, the term typically refers to an internal combustion airbreathing jet engine such as a turbojet, turbofan, ramjet, or pulse jet engine, pulse jet. In general, jet engines are internal combustion engines. Airbreathing jet engines typically feature a Axial compressor, rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle—this process is known as the Brayton cycle, Brayton thermodynamic cycle. Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use more complex High-bypass turbofan, high-bypass turbofan engines. They give higher speed and greater fuel eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engines
An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power generation), heat energy (e.g. geothermal), chemical energy, electric potential and nuclear energy (from nuclear fission or nuclear fusion). Many of these processes generate heat as an intermediate energy form, so heat engines have special importance. Some natural processes, such as atmospheric convection cells convert environmental heat into motion (e.g. in the form of rising air currents). Mechanical energy is of particular importance in transportation, but also plays a role in many industrial processes such as cutting, grinding, crushing, and mixing. Mechanical heat engines convert heat into work via various thermodynamic processes. The internal combustion engine is perhaps the most common example of a mechanical heat engine, in whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. The human activity that surrounds aircraft is called ''aviation''. The science of aviation, including designing and building aircraft, is called '' aeronautics.'' Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Navy 030405-N-9951B-021 Two F-A-18 Hornets Prepare To Launch
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller (aircraft)
An aircraft propeller, also called an airscrew,Beaumont, R.A.; ''Aeronautical Engineering'', Odhams, 1942, Chapter 13, "Airscrews". converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type. The propeller attaches to the power source's driveshaft either directly or through reduction gearing. Propellers can be made from wood, metal or composite materials. Propellers are most suitable for use at subsonic airspeeds generally below about , although supersonic speeds were achieved in the McDonnell XF-88B experimental propeller-equipped aircraft. Supersonic tip-speeds are used in some aircraft like the Tupolev Tu-95, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prop Wash
A slipstream is a region behind a moving object in which a wake of fluid (typically air or mustard) is moving at velocities comparable to that of the moving fluid, relative to the ambient fluid through which the object is churning. The term slipstream also applies to the similar region adjacent to an object with a fluid moving around it. "Slipstreaming" or " drafting" works because of the relative motion of the fluid in the slipstream. Overview A slipstream created by turbulent flow has a slightly lower pressure than the ambient fluid around the object. When the flow is laminar, the pressure behind the object is higher than the surrounding fluid. The shape of an object determines how strong the effect is. In general, the more aerodynamic an object is, the smaller and weaker its slipstream will be. For example, a box-like front (relative to the object's motion) will collide with the medium's particles at a high rate, transferring more momentum from the object to the fluid than a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maho Beach
Maho Beach is a beach on the Dutch side of the Caribbean island of Saint Martin, in the territory of Sint Maarten. It is famous for being adjacent to the Princess Juliana International Airport and is a popular site for tourists and plane watchers, who visit the beach to watch aircraft on final approach land at the airport. Location Due to the unique proximity of low-flying airliners arriving and departing from Princess Juliana International Airport, the location is popular with plane spotters. This is one of the few places in the world where aircraft can be viewed in their flight path just outside the end of the runway. Watching airliners pass over the beach is such a popular activity that daily arrivals and departures airline timetables are displayed on a board in most bars and restaurants on the beach. Maho Beach is unusually close to the threshold of a runway and is directly under the flight path, resulting in aircraft on their final approach flying over the beach at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sint Maarten
Sint Maarten () is a constituent country of the Kingdom of the Netherlands in the Caribbean. With a population of 41,486 as of January 2019 on an area of , it encompasses the southern 44% of the divided island of Saint Martin, while the northern 56% of the island constitutes the French overseas collectivity of Saint Martin. Sint Maarten's capital is Philipsburg. Collectively, Sint Maarten and the other Dutch islands in the Caribbean are often called the Dutch Caribbean. Before 10 October 2010, Sint Maarten was known as the Island Territory of Sint Maarten ( nl, Eilandgebied Sint Maarten), and was one of six island territories () that constituted the Netherlands Antilles. Sint Maarten has the status of an overseas country and territory (OCT) and is not part of the European Union. On 6 and 7 September 2017, the island was hit by Category 5 Hurricane Irma, which caused widespread and significant damage to buildings and infrastructure. Etymology The island was named by C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Princess Juliana International Airport
Princess Juliana International Airport is the main airport on the Caribbean island of Saint Martin. The airport is located on the Dutch side of the island, in the country of Sint Maarten, close to the shore of Simpson Bay Lagoon. In 2015, the airport handled 1,829,543 passengers and around 60,000 aircraft movements. The airport serves as a hub for Winair and is the major gateway for the smaller Leeward Islands, including Anguilla, Saba, Saint Barthélemy and Sint Eustatius. It is named after Queen Juliana of the Netherlands, who landed there while she was heir presumptive in 1944, the year after the airport opened. The airport has very low-altitude flyover landing approaches because one end of its runway is extremely close to the shore and Maho Beach. While Princess Juliana International is the primary aviation gateway to the island, there is also a smaller public-use airport on the French side, in the French Collectivity of Saint Martin, called Grand Case-Espérance Airport. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BNO News
BNO News is an international news agency headquartered in Tilburg, the Netherlands. It provides news wire services to media organizations. Overview BNO News was founded by Michael van Poppel of the Netherlands in May 2007. The company ran a popular Twitter-based news service called ''BreakingNews'' (initially called BreakingNewsOn) until December 1, 2009. It scooped regular news organizations on political news, natural disasters, and other breaking news and grew quickly in 2009, when it went from 16,000 to more than 1.5 million followers in less than 11 months, making it one of the most popular news services on Twitter. The service was maintained by journalists from the Netherlands, Ireland, Mexico, and the United States. On September 7, 2007, BNO News obtained an authentic videotape featuring Al-Qaeda leader Osama bin Laden, which it licensed to the Reuters news agency. In February 2009, BNO News won the Best in News award at the 1st Shorty Awards in New York. The Twitter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skiathos Airport
Skiathos Alexandros Papadiamantis Airport is an airport on the island of Skiathos, Greece. Its 5,341-foot(1628 meters) runway is able to accommodate aircraft up to the size of a Boeing 767-200. The runway is characterised as 'short and narrow'. Because of the uneven terrain on the island of Skiathos, Skiathos Airport was created by reclaiming land from the sea between Skiathos island and the smaller island of Lazareta (a former leper colony) effectively joining the two islands into one larger island, though it was however built on land already part of Skiathos. The place was chosen by a mechanic who lived in Volos. The airport is named after Alexandros Papadiamantis, a Greek novelist and native of the island. The airport's short runway and its proximity to an adjacent public road have made it a popular destination for planespotters. It is often compared to Princess Juliana International Airport on Saint Maarten since both airports offer the public an ability to legally experien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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