Yellow and Blue Mix Up
by Cheryl McClure
Title
Yellow and Blue Mix Up
Artist
Cheryl McClure
Medium
Photograph - Photograph
Description
I love the ripples in the sky as these skydivers float across the span of sky.
Parachuting is performed as a recreational activity and a competitive sport, as well as for the deployment of military personnel Airborne forces and occasionally forest firefighters.
A skydiving center can be a commercial operation or a club, usually operates at an airport, and provides one or more aircraft that takes groups of skydivers up for a fee. An individual jumper can go up in a light aircraft such as a Cessna 172 or Cessna 182. At busier drop zones (DZs) larger turbine-powered aircraft may be used: such as the Cessna 208, de Havilland Canada DHC-6 Twin Otter, GippsAero GA8 Airvan or Short SC.7 Skyvan.
A typical sport parachuting jump involves individuals exiting an aircraft (usually an airplane, but sometimes a helicopter or even the gondola of a balloon), at anywhere from 1,000 to 4,000 meters (3,000 to 13,000 feet) altitude. If jumping from a low altitude, the parachute is usually deployed immediately; however, at higher altitudes, the skydiver may free-fall for up to ~1 minute deploying their main parachute, typically at an altitude of 1000M (~3,500 ft), and landing several minutes later.
After the parachute opens, the jumper can control the direction and speed with toggles on the end of steering lines that attach to the trailing edge of the parachute, and can aim for the landing site and come to a relatively gentle stop. All modern sport parachutes are self-inflating "ram-air" wings that provide control of speed and direction similar to the related paragliders. Purists in either sport would note that paragliders have much greater lift and range, but that parachutes are designed to absorb the stresses of deployment at relatively terminal velocity (~190 km/h).
By manipulating the shape of the body in freefall, a skydiver can generate turns, forward motion, backwards motion, and even lift (relative to other jumpers, not the ground).
Uploaded
January 3rd, 2013
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