Dibbs

Title: Dibbs
[Cover Img]	About: Moderator: Ben Shelef Created: July 6, 2008 Modified: July 6, 2008	Tags: This is a collaborative article Discipline(s): Wiki, Engineering

 

Abstract

This is a collaborative page used for figuring out who's doing what.

Editors: it's easiest to use the section-edit links to get straight to the list you want to modify

Because of a bug in the issue tracker: it is best to add or edit issues on your user page, and only SHOW your issues on this page.

Brad Edwards

brad_edwards@yahoo.com

<issues project = "Edwards" filter = "false" search = "false" />

Kinda Done	In Progress	Intend to do
General Wiki set-up	Filling in background material for people to work with Fleshing out work projects Recruit people	Collaboration in general Filling in the integration Matrix - this may be constantly changing and too complex to be useful so I need to evaluate it first Will pick my favorite technical topics to work once the site is up and operational

Ben Shelef

Kinda Done	In Progress	Intend to do
Article Tags When - When will the SE be built? Specific Strength in Yuris - How to characterize a tether Status and overview on Baseline Climber System	Dibbs Orbital Debris Mitigation Disposable One-Way Elevator Tether-Based Asteroid Payload Return System - analysis of tether system on small asteroid Velocity-like quantities Solar Augmented Climber and Implications - how solar power reduces requirements on CNTs	Strengh Power Lifetime - the relationship between the three quantities FAQ - a set of pages for the FAQs at http://www.spaceward.org/elevator-faq Can I Ride - addressing several frequently asked aspects of manned travel Yuri Artsutanov

Andrew Price

email: aprice2704@gmail.com

http://www.healthspace.com HealthSpace Integrated Solutions Ltd.

http://www.skyder.com Skyder Research Ltd.

Wants a space elevator that can lift 400,000 teu (20ft containers) of cargo per year

<issues project = "Aprice" filter = "false" search = "false" />

Kinda Done	In Progress	Intend to do
		Perhaps -- Coordinator of the Journal of Space Elevator Science, a publication of the Space Elevator Systems Institute

Ed Gray

Economics ed_gray@sbcglobal.net

<issues project = "Ed Gray" search="false" filter="false" />

Kinda Done	In Progress	Intend to do

Greg Rebholz

Legal Pillar (wiki) gregrebholz@gmail.com <issues project = "Greg Rebholz" search="false" filter="false" />

Kinda Done	In Progress	Intend to do
Distribute legal landscape paper	Formation of communications group Development of Legal Pillar on wiki Network with space law lawyers to seed the SE concept	Agency creation

Amie Ellison

Japanese Translation <issues project = "Amie Ellison" search="false" filter="false" />

Abraham Becker

Ablative Propulsion for Contingency Reentry <issues project = "Abraham Becker" search="false" filter="false" />

I propose the investigation of a failsafe emergency system for space elevator that would protect crew, climbers and potentially the SE ribbon itself in the event of a severing of the ribbon at LEO. This would be achieved through the use of a ribbon deployable reflector mechanism and collections of

ground based lasers to support the hardware in the event of a catastrophic sever. Given the relatively narrow range (300 - 4000km) of a likely ribbon sever, a limited number of deployable reflectors could effect a SE ribbon failsafe system.

The reflectors could either make use of (1)laser ablative material or (2)laser photonic pressure to achieve the lift to ensure the safety of crew and assets. The key issue would be the development of a long lasting laser ablative with sufficient thrust capability to achieve the objective. Alternately, the photon pressure could be employed when the price-performance of megawatt lasers drops below a tipping point to enable the economic feasibility of such an undertaking.

Optimally, the lower ribbon could be suspended for a long enough duration to be re-attached with the upper ribbon portion and normal operations to resume. The upper portion of the ribbon could be held in place by a similar system only inverted to deploy the beams down from GEO to a reflector above the sever point. The propulsion beams could be controled to create an intercept and eventual fusion of the ribbon segments.

This investigation would be advisable in light of the extreme cost of SE assets and the integral need for safety and sustainability. Even if normal operation of SE poses little threat of ribbon sever, unexpected events such as a coronal mass ejection intercept with the earth's magnetosphere could make a sever much more likely due to attendant variations of trajectories of LEO objects. The additional costs of such a system would be more lasers of the kind to be developed in any event for the power beaming app.

ANB 07/25/08