|
Reader's Favorites
Media Casualties Mount Administration Split On Europe Invasion Administration In Crisis Over Burgeoning Quagmire Congress Concerned About Diversion From War On Japan Pot, Kettle On Line Two... Allies Seize Paris The Natural Gore Book Sales Tank, Supporters Claim Unfair Tactics Satan Files Lack Of Defamation Suit Why This Blog Bores People With Space Stuff A New Beginning My Hit Parade
Instapundit (Glenn Reynolds) Tim Blair James Lileks Bleats Virginia Postrel Kausfiles Winds Of Change (Joe Katzman) Little Green Footballs (Charles Johnson) Samizdata Eject Eject Eject (Bill Whittle) Space Alan Boyle (MSNBC) Space Politics (Jeff Foust) Space Transport News (Clark Lindsey) NASA Watch NASA Space Flight Hobby Space A Voyage To Arcturus (Jay Manifold) Dispatches From The Final Frontier (Michael Belfiore) Personal Spaceflight (Jeff Foust) Mars Blog The Flame Trench (Florida Today) Space Cynic Rocket Forge (Michael Mealing) COTS Watch (Michael Mealing) Curmudgeon's Corner (Mark Whittington) Selenian Boondocks Tales of the Heliosphere Out Of The Cradle Space For Commerce (Brian Dunbar) True Anomaly Kevin Parkin The Speculist (Phil Bowermaster) Spacecraft (Chris Hall) Space Pragmatism (Dan Schrimpsher) Eternal Golden Braid (Fred Kiesche) Carried Away (Dan Schmelzer) Laughing Wolf (C. Blake Powers) Chair Force Engineer (Air Force Procurement) Spacearium Saturn Follies JesusPhreaks (Scott Bell) Science
Nanobot (Howard Lovy) Lagniappe (Derek Lowe) Geek Press (Paul Hsieh) Gene Expression Carl Zimmer Redwood Dragon (Dave Trowbridge) Charles Murtaugh Turned Up To Eleven (Paul Orwin) Cowlix (Wes Cowley) Quark Soup (Dave Appell) Economics/Finance
Assymetrical Information (Jane Galt and Mindles H. Dreck) Marginal Revolution (Tyler Cowen et al) Man Without Qualities (Robert Musil) Knowledge Problem (Lynne Kiesling) Journoblogs The Ombudsgod Cut On The Bias (Susanna Cornett) Joanne Jacobs The Funny Pages
Cox & Forkum Day By Day Iowahawk Happy Fun Pundit Jim Treacher IMAO The Onion Amish Tech Support (Lawrence Simon) Scrapple Face (Scott Ott) Regular Reading
Quasipundit (Adragna & Vehrs) England's Sword (Iain Murray) Daily Pundit (Bill Quick) Pejman Pundit Daimnation! (Damian Penny) Aspara Girl Flit Z+ Blog (Andrew Zolli) Matt Welch Ken Layne The Kolkata Libertarian Midwest Conservative Journal Protein Wisdom (Jeff Goldstein et al) Dean's World (Dean Esmay) Yippee-Ki-Yay (Kevin McGehee) Vodka Pundit Richard Bennett Spleenville (Andrea Harris) Random Jottings (John Weidner) Natalie Solent On the Third Hand (Kathy Kinsley, Bellicose Woman) Patrick Ruffini Inappropriate Response (Moira Breen) Jerry Pournelle Other Worthy Weblogs
Ain't No Bad Dude (Brian Linse) Airstrip One A libertarian reads the papers Andrew Olmsted Anna Franco Review Ben Kepple's Daily Rant Bjorn Staerk Bitter Girl Catallaxy Files Dawson.com Dodgeblog Dropscan (Shiloh Bucher) End the War on Freedom Fevered Rants Fredrik Norman Heretical Ideas Ideas etc Insolvent Republic of Blogistan James Reuben Haney Libertarian Rant Matthew Edgar Mind over what matters Muslimpundit Page Fault Interrupt Photodude Privacy Digest Quare Rantburg Recovering Liberal Sand In The Gears(Anthony Woodlief) Sgt. Stryker The Blogs of War The Fly Bottle The Illuminated Donkey Unqualified Offerings What she really thinks Where HipHop & Libertarianism Meet Zem : blog Space Policy Links
Space Future The Space Review The Space Show Space Frontier Foundation Space Policy Digest BBS AWOL
USS Clueless (Steven Den Beste) Media Minder Unremitting Verse (Will Warren) World View (Brink Lindsay) The Last Page More Than Zero (Andrew Hofer) Pathetic Earthlings (Andrew Lloyd) Spaceship Summer (Derek Lyons) The New Space Age (Rob Wilson) Rocketman (Mark Oakley) Mazoo Site designed by Powered by Movable Type |
A Space Elevator Blog Really. Boy, talk about specializing. Posted by Rand Simberg at October 18, 2003 12:33 PMTrackBack URL for this entry:
http://www.transterrestrial.com/mt-diagnostics.cgi/1835 Listed below are links to weblogs that reference this post from Transterrestrial Musings.
Comments
I hope they have a lot to report on in the next few years. Posted by B.Brewer at October 18, 2003 01:17 PMI'm curious about something. How does the space elevator concept compare to building a linear accelerator large enough to launch payloads? Is that comparing apples to apples, or would each be useful for different purposes? Posted by Alan K. Henderson at October 18, 2003 10:38 PMThey are starting up big. Single-stage-to-tether would be much easier sell. Like the one outlined on www.spacetethers.com Posted by at October 19, 2003 04:05 AMAlan: an em-gun launcher and a space elevator are totally different animals. The latter can be used to launch anything, while the former can only launch payloads that can withstand several hundred to several thousand Gs of acceleration. The primary barrier for the former is the materials-engineering challenge (which I believe can be overcome, sooner or later), while the primary barrier for the latter is the environmental impact (which I believe cannot be overcome). The payloads of an em-gun launcher would have to exit the barrel at roughly mach 27; the resulting sonic boom would likely kill anything with eardrums over an area of hundreds of square miles. About the only plausible place to conduct such launches would be Antarctica, which doesn't result in the most useful of orbits. Posted by Nathan Koren at October 19, 2003 11:48 PMHeinlein may have been right about building rail guns on the Moon. No sonic boom problem there, and only one-sixth gee. Sound would travel through the crust - would that present a problem for lunar colonists? I've heard that a rail gun could be suitable for (survivable) human launch if it were built long enough. Assuming that the launch site is on the equator in the Ecuadoran Andes (and not without seismograph-triggered shutoff switches for that tectonically active location), how far east would the rail gun have to extend? Posted by Alan K. Henderson at October 21, 2003 12:03 AMWith apologies to Rand for diverting the thread, I'll have a post answering that question later today. Posted by Jay Manifold at October 21, 2003 09:13 AMIt's up. Graze on over. Posted by Jay Manifold at October 21, 2003 12:40 PMAlan, it's high school physics. V=at Desired V=8000 m/sec Then t=80 sec Now, 10 g over 80 seconds is survivable, but can be harmful. With 5 g, the rail will be 4 times longer - 320 km. Posted by Ilya at October 22, 2003 09:20 AMWith 5 g, the rail will be 4 times longer - 320 km.Your first calculation is correct, but this one is large by a factor of 2. If you solve v = at for t and plug that into d = (at^2)/2 you'll find that a = (v^2)/2d and d = (v^2)/2a; the final velocity is the squared term, while acceleration and distance are both linear. Posted by Troy at October 22, 2003 10:47 PM...actually, I should have said "reciprocal" instead of "linear". :-/ Posted by Troy at October 22, 2003 10:48 PMCan anybody help! Can anybody help! Sure a .45 caliber pistol will work on the moon. Some people thing that you need oxygen for a gun to fire, but that's not true. Everything you need for the bullet to go bang is inside the bullet, no need to add air. The smokeless powder used in bullets detonates rather than combusts. There are a couple of things to keep in mind however. If the pistol is left in the cold too long the lubricants will freeze and the gun will jam up. (This happens even on earth in very cold conditions.) Second, if the gun is left out in sun the lubricants will vapourize and primer in the bullets might get hot enough to go off in the gun without the trigger being pulled, similar to when bullets are thrown in a hot fire. P.S. In a shamless, self-promoting plug, I will mention that I've written on problems with building a space elevator in my own blog which can be reached by the URL below. Posted by Ronald Brak at October 2, 2005 07:20 PMD'oh! I just replied to a comment that's nearly a year old! Oh well, maybe Scotty checks every week or something to see if anyone's answered his question. Posted by Ronald Brak at October 2, 2005 07:47 PMPost a comment |