A Bridge to Space: The Mechanics and Design Considerations for a Space Elevator
Achieving orbit is currently an extremely expensive and resource-heavy venture. Current rockets cost anywhere from $10,000 to $20,000 to lift a single kilogram of payload to low earth orbit. A space elevator may be able to lift a kilogram to orbit for as little as $200. A space elevator is a cable anchored at the equator that extends into space past geostationary orbit, using the centrifugal force of Earth’s rotation to hold itself upright under tension. Such a cable may be constructed using materials with extremely high strength-to-weight ratios. The overall design of a space elevator consists of the cable itself, a counterweight to suspend the cable via centrifugal force, climbers to deliver payload to and from orbit, and a base station anchoring the cable to the Earth somewhere along the equator. Craft released from the space elevator at a height of 53,000 kilometers would be at escape velocity, allowing them to reach other celestial bodies without the thousands of tons of fuel and stages conventional rockets require for the same velocity. Challenges faced include weather conditions within the atmosphere, the effects of solar radiation on the cable, collisions with orbital debris, cable oscillations, research and development costs, and political complications.
MATH 499, Capstone
Brian Carrigan
SPS 100
2:30 – 3 PM