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Tandem Skydiving
Tandem skydiving or tandem parachuting refers to a type of parachuting, skydiving where a student skydiver is connected to an instructor via a harness. The instructor guides the student through the whole jump from exit through freefall, canopy piloting, piloting the canopy, and landing. The student needs only minimal instruction before making a tandem jump with the instructor. In the United States most skydiving centers and clubs require that you be 18 years or older to skydive whereas in other countries the minimum age can be lower or higher. This is one of three commonly used training methods for beginning skydivers; the others being Static line, Instructor-assisted deployment (IAD), and Accelerated freefall (AFF) (k). Tandem skydiving is a very popular training method for first time skydivers, but it is more expensive than a static line. It exposes first-time jumpers to skydiving with minimal expectations from the student. The training may consist of many of the activities ...
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Tandem Parachute And Harness
Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two or more draft horses, or other draft animals, harnessed in a single line one behind another, as opposed to a pair, harnessed side by side, or a team of several pairs. The tandem harness allows additional animals to provide pulling power for a vehicle designed for a single animal. The English word ''tandem'' derives from the Latin adverb , meaning ''at length'' or ''finally''. It is a word play, using the Latin phrase (referring to time, not position) for English "at length, lengthwise". Tandem bicycles are named for their tandem seating, a more common arrangement than side-by-side "sociable" seating. ''Tandem'' can also be used more generally to refer to any group of persons or objects working together, not necessarily in line. Automob ...
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Parachuting
Parachuting, including also skydiving, is a method of transiting from a high point in the atmosphere to the surface of Earth with the aid of gravity, involving the control of speed during the descent using a parachute or parachutes. For human skydiving, it may involve a phase of more or less free-falling (the skydiving segment) which is a period when the parachute has not yet been deployed and the body gradually accelerates to terminal velocity. For cargo parachuting, the parachute descent may begin immediately, such as a parachute-airdrop in the lower atmosphere of Earth, or be significantly delayed, such as in a planetary atmosphere where an object is descending "under parachute" following atmospheric entry from space, and may begin only after the hypersonic entry phase and initial deceleration that occurs due to friction with the thin upper atmosphere. History Common uses Parachuting is performed as a recreational activity and a competitive sport, and is widel ...
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Freefall
In Newtonian physics, free fall is any motion of a body where gravity is the only force acting upon it. In the context of general relativity, where gravitation is reduced to a space-time curvature, a body in free fall has no force acting on it. An object in the technical sense of the term "free fall" may not necessarily be falling down in the usual sense of the term. An object moving upwards might not normally be considered to be falling, but if it is subject to only the force of gravity, it is said to be in free fall. The Moon is thus in free fall around the Earth, though its orbital speed keeps it in very far orbit from the Earth's surface. In a roughly uniform gravitational field gravity acts on each part of a body approximately equally. When there are no other forces, such as the normal force exerted between a body (e.g. an astronaut in orbit) and its surrounding objects, it will result in the sensation of weightlessness, a condition that also occurs when the gravitation ...
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Canopy Piloting
Canopy piloting (also known as swooping) encompasses several disciplines, all involving the flight of a skydiving parachute. "Swooping" is a form of canopy piloting associated with advanced skydiving. Given the close proximity to the ground during the various maneuvers, as an exhibition swooping is spectator friendly. Records World records that have been recorded and verified include{{cite web , url=http://www.fai.org/record-parachuting , title=Parachuting , publisher=Fai.org , accessdate=17 May 2013 , url-status=dead , archiveurl=https://web.archive.org/web/20150629231803/http://www.fai.org/record-parachuting , archivedate=29 June 2015 : :G-1-f1 : Distance - General - Canopy Piloting Records : 151.95m :Date of : 15 June 2012 :Parachutist(s): Nick Batsch (USA) :Canopy type: Daedalus JPX Petra :Course/place: Rockmart, GA (USA) :G-1-f2 : Speed over a 70m course - General - Canopy Piloting Records : 2.404 sec :Date of : 15 June 2012 :Parachutist(s): Greg Windmiller (USA) :Canopy t ...
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Static Line
A static line is a fixed cord attached to a large, stable object. It is used to open parachutes automatically for paratroopers and novice parachutists. Design and use A static line is a cord attached at one end to the aircraft and at the other end to the top of the jumper's "D-Bag" (deployment bag, into which the canopy is packed). The parachutist's fall from the aircraft causes the static line to become taut, this then pulls the D-Bag out of the container on the jumper's back. The static line and D-Bag stay with the aircraft as the jumper leaves, and are pulled back into the aircraft by the dispatcher. Now free of its D-Bag, the canopy is allowed to inflate as the jumper continues to fall. Effectively, the jumper drags the parachute behind him, causing the upward-rushing wind to force open and inflate the canopy. The canopy should inflate and begin supporting the jumper within four seconds. In the unlikely event of a malfunction, students are taught how to cut away the main ...
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Instructor-assisted Deployment
Instructor-assisted deployment (IAD) is a parachute deployment program most adequately similar to static line. The main difference is that instead of being deployed by a static line, the student's jumpmaster Jumpmasters are the expert paratroopers in an airborne unit who train and teach the military techniques for jumping from airplanes. They are responsible for training soldiers who enter Army Airborne School into paratroopers and managing airborne ju ... (who is in the plane with them) deploys the student's parachute by throwing the pilot chute downward and clear of the door as the student exits. Among the benefits to IAD is the ability to use the same parachute equipment as the students will use when they progress to deploying their parachutes on their own, and the decreased chance of an inconvenience called line twists. Furthermore, in the situation of a bag lock malfunction, the student won't stay attached to the plane. Parachuting {{Air-sports-stub ...
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Accelerated Freefall
{{unreferenced, date=December 2016 Accelerated freefall (AFF) (known in Canada as progressive freefall, and in Finland as Nova (''NO''peutettu ''VA''paapudotus, a literal translation)) is a method of skydiving training. This method of skydiving training is called "accelerated" because the progression is the fastest way to experience solo freefall, normally from 10,000 to 15,000 feet above ground level (AGL). In static line progression, more jumps are required to experience freefall, but the jumps are less expensive for the student as one instructor can dispatch multiple students per load and students are initially dispatched from lower altitudes. Under accelerated freefall, one or sometimes two instructors are dedicated just to one student. Training technique In most AFF programs, two instructors jump with the student during their first three AFF jumps, although some programs may use only one instructor. On the initial levels, the instructor(s) hold on to the student until the stud ...
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Drogue Parachute
A drogue parachute is a parachute designed for deployment from a rapidly-moving object. It can be used for various purposes, such as to decrease speed, to provide control and stability, or as a pilot parachute to deploy a larger parachute. Vehicles that have used drogue parachutes include multi-stage parachutes, aircraft, and spacecraft recovery systems. The drogue parachute was invented by the Russian professor and parachute specialist Gleb Kotelnikov in 1912, who also invented the knapsack parachute. The Soviet Union introduced its first aircraft fitted with drogue parachutes during the mid 1930s; use of the technology expanded during and after the Second World War. A large number of jet-powered aircraft have been furnished with drogue parachutes, including the Boeing B-52 Stratofortress strategic bomber and the Eurofighter Typhoon multirole aircraft; they were also commonly used within crewed space vehicle recovery programmes, including Project Mercury and Project Gemi ...
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Automatic Activation Device
In skydiving, an automatic activation device (AAD) is a dead man's switch consisting of an electronic-pyrotechnic or mechanical device that automatically opens the main or reserve parachute container at a preset altitude or after a preset time. AADs are typically used to open the reserve parachute container at a preset altitude if the descent rate exceeds a preset activation speed. This indicates that the user has not opened their parachute, or that the parachute is malfunctioning and is not slowing the descent rate sufficiently. The older style mechanical AADs are falling out of fashion in favour of newer style electronic-pyrotechnic models. These newer models have been proven more reliable as their built-in computers allow for better estimation of altitude and vertical speed. Electronic AADs typically employ a small pyrotechnic charge to sever the reserve container closing loop, allowing the spring-loaded reserve pilot chute to deploy. Examples Examples of specific AADs are: ...
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United States Parachute Association
The United States Parachute Association (USPA) is a private sports governing body for the sport of skydiving in the United States. Its headquarters are located in Fredericksburg, Virginia. The USPA's roots go back to the National Parachute Riggers-Jumpers, Inc., which was formed in the 1930s. Functions USPA performs the following functions: * Issues sport skydiving licenses * Publishes and maintains skydiving training manuals and course guidelines from which instructional ratings are issued * Serves as legal advocate and political lobbyist for skydiving * Provides third-party insurance for skydivers * Maintains the Basic Safety Requirements (BSRs) as a set of voluntarily followed safety guidelines * Coordinates skydiving competitions and awards * Issues awards for longevity, skill and achievement * Publishes ''Parachutist'', a monthly magazine for members In November 2020, USPA announced their plans for a National Skydiving Museum to be built in Central Florida, but didn't specif ...
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External Links
An internal link is a type of hyperlink on a web page to another page or resource, such as an image or document, on the same website or domain. Hyperlinks are considered either "external" or "internal" depending on their target or destination. Generally, a link to a page outside the same domain or website is considered external, whereas one that points at another section of the same web page or to another page of the same website or domain is considered internal. These definitions become clouded, however, when the same organization operates multiple domains functioning as a single web experience, e.g. when a secure commerce website is used for purchasing things displayed on a non-secure website. In these cases, links that are "external" by the above definition can conceivably be classified as "internal" for some purposes. Ultimately, an internal link points to a web page or resource in the same root directory. Similarly, seemingly "internal" links are in fact "external" for ...
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