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Introduction: Space Elevator
The Space Elevator is the most promising space
transportation system on the drawing boards today. It combines scalability, low
cost, qualify of ride, and safety to deliver truly commercial grade space
access- practically comparable to train ride to space.
Rocket- based space launch system is inherently limited
by the physics of rocket propulsion( a force that pushes rocket to go up, against the gravity).
More than 90% of the rocket’s weight is propellant (as propellants only push rocket to go up),
and the rest is split between the weight of the fuel tank and the payload.
The problem with rocket propulsion - It is
very difficult to make such a vehicle safe or low cost. A target cost of $1,000
US kg provides to be impossible to reach. In comparison, airliners charge us about
1$ per pound, and train transportation is in cents per pound.
Therefore, the space Elevator will work like lifts into space and certainly will bring the cost down.
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Facts about Space Elevator
In the experiment about Space Elevator, two ultra-small cubic satellites
developed by Shizuoka university of Japan. Each satellite measures 10 centimetres
each side. Roughly 10-meter-long steel cable will be employed to connect twin
satellite.
The pair of satellite will be released from International Space Station (ISS) and Container acting like elevator car will
be moved on cable connecting satellites using motor. The movement of motorised
elevator box will be monitored with cameras in the satellite.
The climbers travel at speeds comparable to a
fast train. And carry no fuel on board as the system is powered by a combination of
sunlight and laser light projected from ground. While the trip to space takes
several days, climbers are launched once per day.
The working - Elaboration
The one end of cable of space elevator will be
attached near to surface and the other end in space beyond geostationary orbit
(35,786 km altitude).
The competing forces of gravity, which is stronger at lower end and outward or upward centrifugal force that means- a force, arising from the body’s inertia, which appears to act on a body moving in a circular path and is directed away from the centre around which the body is moving- which is stronger to upper end, will result in the cable being held up, under tension, and stationary over single position on the Earth.
Once cable (tether) is deployed at fixed position. Climber can repeatedly climb it to venture into space by mechanical means, releasing their cargo to orbit. Climber also can descend either to return cargo to surface from orbit.
The competing forces of gravity, which is stronger at lower end and outward or upward centrifugal force that means- a force, arising from the body’s inertia, which appears to act on a body moving in a circular path and is directed away from the centre around which the body is moving- which is stronger to upper end, will result in the cable being held up, under tension, and stationary over single position on the Earth.
Once cable (tether) is deployed at fixed position. Climber can repeatedly climb it to venture into space by mechanical means, releasing their cargo to orbit. Climber also can descend either to return cargo to surface from orbit.
History Background: A great Idea
The idea of space elevator was first proposed in 1895 by Russian scientist Konstantin Tsiolkovsky after he saw Eiffel Tower in Paris and later it was revisited nearly century later in novel by Arthur Clarke.
The idea of space elevator was first proposed in 1895 by Russian scientist Konstantin Tsiolkovsky after he saw Eiffel Tower in Paris and later it was revisited nearly century later in novel by Arthur Clarke.
