The Space elevator blog discusses the needed tether strength based on work by Ben Shelef, CEO of the Spaceward Foundation:
A tether which has a tensile strength of 30 GPa-cc/g would be strong enough to create a useful Space Elevator provided the Climber power system can generate at least 1.5 kWatt/kg. If the tensile strength of the tether is only 25 GPa-cc/g, the power system needs to generate at least 3.5 kWatt/kg.
Space Elevator tethers must have extra strength for safety margin and enough strength to do three things
1. add replacement material to handle tether degradation
2. add material to increase the tether’s carrying capacity
3. hold a spare seed ribbon.
The stronger the power system is, the weaker the tether can be and a weaker the power system needs a stronger tether.
The faster your climbers climb then they can get high enough so that gravity weakens so you can launch another significant Climber.
– at 2,624 kilometers in height, a climber is one half of its ground weight
– at 6,400 kilometers in height, a climber is one quarter of its ground weight
The latest tether work is discussed at the 2008 Euro Spaceward Conference
The abstracts from the second day of the 2008 Euro Spaceward Conference are here
Outlook on tethers from the 2008 Euro Spaceward Conference
Wang is a prolific business-oriented writer of emerging and disruptive technologies. He is known for insightful articles that combine business and technical analysis that catches the attention of the general public and is also useful for those in the industries. He is the sole author and writer of nextbigfuture.com
, the top online science blog. He is also involved in angel investing and raising funds for breakthrough technology startup companies.
He gave the recent keynote presentation at Monte Jade event with a talk entitled the Future for You. He gave an annual update on molecular nanotechnology at Singularity University on nanotechnology, gave a TEDX talk on energy, and advises USC ASTE 527 (advanced space projects program). He has been interviewed for radio, professional organizations. podcasts and corporate events. He was recently interviewed by the radio program Steel on Steel on satellites and high altitude balloons that will track all movement in many parts of the USA.
He fundraises for various high impact technology companies and has worked in computer technology, insurance, healthcare and with corporate finance.
He has substantial familiarity with a broad range of breakthrough technologies like age reversal and antiaging, quantum computers, artificial intelligence, ocean tech, agtech, nuclear fission, advanced nuclear fission, space propulsion, satellites, imaging, molecular nanotechnology, biotechnology, medicine, blockchain, crypto and many other areas.