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The Shuttle in retrospect

Whilst the shuttle has been a reasonably successful launch vehicle, it had been unable to meet its goals of radically reducing flight launch costs, as each flight costs on the order of $500 million rather than initial projections of $10 to $20 million.

Although the design is radically different than the original concept, the project was still supposed to meet the upgraded AF goals as well as be much cheaper to fly in general. What went wrong?

One issue appears to be inflation. During the 1970s the US suffered from the worst inflation in modern history, driving up costs about 200% by 1980. In contrast, the rate between 1990 and 2000 was only 34% in total. This has the effect of magnifying the development costs of the shuttle tremendously.

However this doesn't explain the high costs of the continued operations of the shuttle. Even accounting for inflation the launch costs on the original estimates should be about $100 million today. To explain this you have to look at the operational details of maintaining and servicing the shuttle fleet, which have turned out to be tremendously more expensive than anticipated.

When originally conceived the shuttle was to operate similar to an airliner. After landing the Orbiter would be checked out and start "mating" to the rest of the system (the ET and SRBs) and be ready for launch in as little as two weeks. Instead this turnaround process in fact takes months. This is due, in turn, to the continued "upgrading" of the inspection process as a result of hardware decisions made to reduce short-term development costs which resulted in higher maintenance requirements which where exacerbated by the fallout from the loss of Challenger. Even simple tasks now require unbelievable amounts of paperwork. This paperwork results from the fact that, unlike current expendable launch vehicles, the Space Shuttle is manned and has no escape systems to speak of and therefore any accident which would result in the loss of booster would also result in the loss of the crew which is, of course, unacceptable. Because loss of crew is unacceptable, the primary focus of the shuttle program is to return the crew to earth safely, which can conflict with other goals, namely to launch satellites cheaply. Furthermore, because there are cases where there are no abort modes, no potential way to prevent failure from becoming critical, many pieces of hardware simply must function perfectly and so must be carefully inspected before each flight.

The result is a massively inflated manpower bill. There are 25,000 workers in shuttle operations (perhaps an older number), so simply multiply any figure that you choose for an average annual salary, divide by six (or 4 or 7...launches per year), and there you have it.

The lessons of the shuttle have been seen as different depending on who you ask. In general, however, future designers look to systems with only one stage, automated checkout, and in some cases, overdesigned (more durable) low-tech systems.

Perhaps the most annoying aspect of the shuttle system is to consider the Air Force participation. While the blame rests solely at the feet of NASA for getting them involved in the first place, it was the Air Force requirements that drove the system to be as complex and expensive as it is today. Ironically neither NASA nor the Air Force got the system they wanted or needed, and the Air Force eventually threw in the towel and returned to their older launch systems and abandoned their Vandenburg shuttle launch plans. The capabilities which most seriously hobbled the Shuttle system, namely the 65,000 payload, large payload bay, and 1000 mile cross-range, have in fact, except for the payload bay, never been used.

James Webb Space Telescope
James Webb Space Telescope The James Webb Space Telescope (JWST) is a planned orbital infrared observatory, intended (in part) to replace the aging Hubble Space Telescope. Formerly called the Next Generation Space Telescope (NGST), it was renamed after NASA's second administrator, James E. Webb, in 2002. The telescope's launch is planned for sometime between 2009 and 2011. Its orbit (at the L2 lagrangian point point, around 1.5 million km from Earth) is considerably beyond the maximum altitude achievable using the Space Shuttle, so JWST will probably be placed in orbit using a European Ariane 5 launcher. This height also means that, unlike Hubble, it will not be possible to repair or upgrade the observatory during its 5-10 year design life. Although JWST has a planned weight half that

Image : Opportunity's left front wheel. Image credit: NASA/JPL.

NASA's Rovers Continue Martian Missions 05.24.05 -- NASA's Mars rover Opportunity is trying to escape from a sand trap, while its twin, Spirit, has been busy finding new clues to a wet and violent early Martian history.

Jean Michel Jarre
displays and fireworks. One of his albums, Musique pour supermarchés had a print run on only a single copy, which was auctioned to raise money for French artists. In 1986 he worked with NASA; astronaut Ronald McNair was to play the saxophone part of Jarre's piece Rendez-Vous VI while in orbit on board the Space Shuttle Challenger. It was to have been the first piece of music recorded in space, for the album Rendez-Vous. After the Challenger disaster of January 28, 1986, the piece was recorded with a different saxophonist, retitled Ron's piece and the album dedicated to the seven Challenger astronauts. He was married to actress and photographer Charlotte Rampling. He is a UNESCO Goodwill Ambassador. Discography Oxygene (1976) Equinoxe (1978) Magnetic fields (Les Chants Magnétiques) (1981) Concerts in China

Spacelab
Spacelab is a microgravity laboratory flown into space on the Space Shuttle. It consists of a large cylindrical main laboratory that is flown in the rear of the Space Shuttle cargo bay, connected to the crew compartment by a long tube. In April 1973 NASA and the ESA (then known as the ESRO) agreed to build a modular science package. Construction of Spacelab started in 1974 by the ERNO (represented by VFW-Fokker GmbH, later bought by MBB, and since 2003 part of EADS Space Transportation). The first lab, LM1, was given to NASA free of charge in exchange for flight opportunities for european astronauts. A second lab, LM2, was bought by NASA for its own needs. The system also included a system of external pallets for experiments in vacuum, built by

With the major Apollo development effort winding down in the second half of the 1960s, NASA started looking to the future of the space program. They envisioned an ambitious program consisting of a large space station being launched on huge boosters, served by a reusable logistics "space shuttle", both providing services for a permanantly manned Lunar colony and eventual manned missions to Mars.

Shuttles
4 The Shuttle decision
5 Shuttle development
6 The Shuttle in retrospect
7 Shuttle description
8 Shuttle accidents
9 Previous Programs
10 External links

Components

The Space Shuttle consists of four main components: