Track (rail transport)

The track on a railway or railroad, also known as the permanent way, is the structure consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll. For clarity it is often referred to as railway track (British English and UIC terminology) or railroad track (predominantly in the United States). Tracks where electric trains or electric trams run are equipped with an electrification system such as an overhead electrical power line or an additional electrified rail.

The term permanent way also refers to the track in addition to lineside structures such as fences etc.

Structure

Traditional track structure

Notwithstanding modern technical developments, the overwhelmingly dominant track form worldwide consists of flat-bottom steel rails supported on timber or pre-stressed concrete sleepers, which are themselves laid on crushed stone ballast.

Jet

Jet, Jets, or The Jets may refer to:

Aerospace

Fiction

Characters

Jetstar Airways

Jetstar Airways Pty Ltd, trading as Jetstar, is an Australian low-cost airline (self-described as "value based") headquartered in Melbourne, Australia. It is a wholly owned subsidiary of Qantas, created in response to the threat posed by low-cost airline Virgin Blue. Jetstar is part of Qantas' two brand strategy of having Qantas Airways for the premium full-service market and Jetstar for the low-cost market. Jetstar carries 8.5% of all passengers travelling in and out of Australia.

The airline operates an extensive domestic network as well as regional and international services from its main base at Melbourne Airport, using a mixed fleet of the Airbus A320 family and the Boeing 787 Dreamliner. Like its Qantas parent, Jetstar competes with Virgin Australia and its fully owned low-cost subsidiary Tigerair Australia.

Qantas through the Jetstar Group has stakes in sister airlines Jetstar Asia Airways, Jetstar Pacific Airlines and Jetstar Japan.

History

The airline was established by Qantas in 2003 as a low-cost domestic subsidiary. Qantas had previously acquired Impulse Airlines on 20 November 2001 and operated it under the QantasLink brand, but following the decision to launch a low-cost carrier, re-launched the airline under the Jetstar brand. Domestic passenger services began on 25 May 2004, soon after the sale of tickets for her inaugural flight in February 2004. International services to Christchurch, New Zealand, commenced on 1 December 2005. Although owned by Qantas, its management operates largely independent of Qantas through the company formerly known as Impulse Airlines.

Jet (song)

"Jet" is a song by Paul McCartney and Wings from their album Band on the Run. Supposedly written about a puppy that McCartney owned, the song was the first British and American single to be released from the album. The song peaked at number 7 in both the British and American charts on 30 March 1974, also charting in multiple countries in Europe. It has been released on numerous compilation albums, and has since become one of the band's most well-known tracks.

Along with "Helen Wheels" and "Junior's Farm", "Jet" is another McCartney song where his primary inspiration for composing the song arose in daily life.

Background

Reviewers have reported that the subject of the song is McCartney's Labrador Retriever dog named "Jet". McCartney has also substantiated this claim.

However, in a 2010 interview on the UK television channel ITV1 for the program Wings: Band on the Run (to promote the November 2010 CD/DVD re-release of the album) McCartney explained that Jet was the name of a pony he had owned, although many of the lyrics bore little relation to the subject; indeed, the true meaning of the lyrics has defied all attempts at decryption.