Saturday, January 26, 2008

Virgin Galactic(SpaceShipTwo)

Development of SpaceShipTwo

Artist's concept of the VSS Enterprise
Artist's concept of the VSS Enterprise

After talks throughout 2004, on September 24, 2004 Virgin Galactic signed a deal worth up to US$21 million with Mojave Aerospace Ventures to license the patents behind the Tier One project for purposes of space tourism. The deal was announced by Branson and Burt Rutan on September 27, 2004 at the Royal Aeronautical Society in London. The initial plan is for Rutan to design and build five suborbital tourist craft based on a scaled-up version of SpaceShipOne. Construction began in 2005, with twelve to eighteen months of intensive testing (comprising at least 50-100 test flights) planned. Actual spaceflights for ordinary citizens are expected to begin on the SpaceShipTwo VSS Enterprise in Upham, New Mexico soon after. It is unknown whether a recent explosion which took place at Scaled Composites will affect the date of the maiden flight.[4][5] However, Virgin Galactic and Scaled Composites plan to present their SpaceShipTwo with its WhiteKnightTwo carrier aircraft on January 23, 2008 at the American Museum of Natural History in New York.

General overview of the spacecraft flights

Artist's concept of WhiteKnightTwo and SpaceShipTwo together on ascent
Artist's concept of WhiteKnightTwo and SpaceShipTwo together on ascent

It is planned that the spacecraft are to be robust and affordable enough to take paying passengers. The craft is projected to be a six passenger, two pilot craft.[1] It is planned to make suborbital flights, with a short period of weightlessness. The time from liftoff of the White Knight II booster carrying SpaceShipTwo until the touchdown of SpaceShipTwo after the suborbital flight will be about 2.5 hours. The suborbital flight itself will only be a small fraction of that time. The weightlessness will last approximately 6 minutes.[2] Passengers will be able to release themselves from their seats during these 6 minutes and float around the cabin.

SpaceShipTwo's performance

SpaceShipTwo will fly a little higher than SpaceShipOne, to a height of 110 km in order to go beyond the defined boundary of space (100 km) and lengthen the experience of weightlessness.[1] The spacecraft will reach around Mach 3 (1000 m/s), which is slightly faster than current fighter jets are capable of attaining, however the spacecraft will not be able to sustain that speed for long periods of time. To re-enter the atmosphere SpaceShipTwo folds its wings up, and then returns them to their original position for a smooth and gentle glide back onto the runway. The craft has a very limited cross-range capability and therefore has to land in the area where it started.

Bookings

Although the initial deposit is set to be $200,000 for the first 100 to fly, the next 400 will pay a deposit between $100,000 and $175,000; all passengers after that will pay a deposit of only $20,000 each.

Among those reported to have told Branson that they wished to be among the first to fly on the spacecraft are actor William Shatner designer Philippe Starck, The Panic Channel guitarist Dave Navarro,[10] Alien star Sigourney Weaver, Hollywood director Bryan Singer,[9] Musician Moby,[10] socialite Paris Hilton,[12] and astrophysicist Stephen Hawking (who on January 8, 2007 announced plans to take a sub-orbital flight in 2009[13]). Also, Richard Branson himself and some of his family members will be launched on the VSS Enterprise's first commercial flight in 2009, before everyone else. In 2006, Richard Branson offered actor William Shatner a free ride on the inaugural space launch in 2008, saving Shatner $200,000; however, Shatner turned it down, and said, "I do want to go up but I need guarantees I'll definitely come back".In addition, other celebrities such as Patrick Stewart have expressed serious doubts about flying into space. In March 2005, Doug Ramsberg, a native of Northglenn, Colorado, won a free trip to suborbital space aboard Virgin Galactic, from a Volvo sweepstakes sponsored by Virgin.In September 2006, Alan Watts, a British businessman, indicated that he was able to redeem 2,000,000 frequent flyer miles for a ticket aboard a 2009 Virgin Galactic space flight.

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