Tip jet

Tip jet refers to the jet nozzles at the tip of some helicopter rotor blades, to spin the rotor, much like a Catherine wheel firework.

Some tip jets use compressed air, provided by a separate engine, to create jet thrust. Others use an afterburner type system to burn fuel in the compressed air at the tip (tip-burners) to enhance the thrust. Some are ramjets or even a complete turbojet engine. Some are rocket tip jets that run off stored propellant such as hydrogen peroxide.

Tip jets replace the normal shaft drive and have the advantage of placing no torque on the airframe, so no tail rotor is required.

Some simple monocopters are composed of nothing but a single blade with a tip rocket.

The Austrian philosopher Ludwig Wittgenstein investigated a tip jet design while studying aeronautical engineering at Manchester University.

The Italian designer V Isacco built "Helicogyre"s in the 1920s which used piston engines at the ends of the rotary wing and he foresaw that they might be replaceable by jets.

Tip

Tip may refer to:

Science and technology

Entertainment media

Štip

Štip (Macedonian: Штип [ʃtip]) is the largest urban agglomeration in the eastern part of the Republic of Macedonia, serving as the economic, industrial, entertainment and educational focal point for the surrounding municipalities. As of the 2002 census, the Štip municipality alone had a population of about 47,796. Štip is the largest textile production center in the country; Center of the fashion industry in Macedonia, as well as the location of the sole public university in eastern Macedonia, Goce Delčev University of Štip. The city of Štip is the seat of Štip Municipality.

Geography and climate

The city is located at the intersection of the Lakavica, Ovče Pole, and Kočani valleys. Two rivers pass through Štip, the Bregalnica which is the second largest in the Republic of Macedonia, and the Otinja which divides the city center. The hill Isar, with its early medieval fortress on top, dominates the city and provides for the common reference as "The city under the Isar'. The area surrounding the city is suffering from deforestation which is contributing to the temperature extremes, summers being hot and dry with mean temperatures around 32 °C (90 °F) and days above 40 °C (104 °F) being common. Winters are short (less than 2 months usually) and mild (though considered cold for the area) with normals around −2 °C (28 °F), but with occasional drops down to −10 °C (14 °F). Spring usually comes in February, when most of the foliage is regenerating, although freak snow storms could appear as late as May.

Princess Ozma

Princess Ozma is a fictional character from the Land of Oz, created by L. Frank Baum. She appears in every book of the Oz series except the first, The Wonderful Wizard of Oz (1900).

She is the rightful ruler of Oz, and Baum indicated that she would reign in the fairyland forever, being immortal.

Baum described her physical appearance in detail, in The Marvelous Land of Oz: "Her eyes sparkled as two diamonds, and her lips were tinted like a tourmaline. All adown her back floated tresses of ruddy gold, with a slender jeweled circlet confining them at the brow." As originally illustrated by John R. Neill, she fit this description; however, in most subsequent Oz books, Ozma's hair became darker.

The classic books

While still an infant, Ozma, the baby daughter of the former King Pastoria of Oz, was given to the witch Mombi of the North by the Wizard of Oz. Mombi transformed Ozma into a boy and called him "Tip" (short for Tippetarius) in order to prevent the rightful ruler of Oz from ascending to the throne. Thus, Ozma spent her entire childhood with Mombi in the form of the boy Tip, and had no memory of ever having been a girl. During this time, Tip had managed to create Jack Pumpkinhead who was brought to life by Mombi's Powder of Life. In The Marvelous Land of Oz, Glinda the Good Sorceress discovered what had happened and forced Mombi to turn Tip back into Ozma; ever since then, the Princess has possessed the Throne of Oz (although many realms within Oz remained unaware of her authority).

Jet

Jet, Jets, or The Jets may refer to:

Aerospace

Fiction

Characters

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.

Ground Control (film)

Ground Control (Jet) is a 1998 disaster thriller film directed by Richard Howard and starring Kiefer Sutherland, Bruce McGill, Kristy Swanson, and Robert Sean Leonard. The film also features a cameo by former baseball player Steve Sax in the role of an airline co-pilot.

Plot

Chicago air traffic controller Jack Harris (Kiefer Sutherland) was cleared of liability for an ill-fated flight under his authority which resulted in the loss of all 174 souls aboard. He subsequently left the job and went on to design air control software, until five years later when T.C. Bryant (Bruce McGill), his ex-colleague who had since transferred to Phoenix, pleads for help on New Year's Eve, due to a critical staff shortage and with torrential weather predicted.

Jack's return to the control room is met with both warmth and disdain, particularly when he experiences flashbacks of the crash. The atmosphere rapidly becomes much more serious as the storm approaches and, with the control tower suffering power cuts, the team is forced into manually directing busy air traffic through severe turbulence.