|
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 |
Space Confusion At The Pentagon In today's Space.com, Leonard David reports on a speech by Peter Teets, the Undersecretary of the Air Force, and his thoughts on military space. While some of them are encouraging, others indicate that much of his mindset still remains mired in the past. Not surprising, since he's a former Lockheed Martin executive, who's spent his entire career there (the past, that is...) The use of spacecraft for national security purposes and to combat terrorism is on a dramatic growth curve. That increased reliance calls for new spaceborne abilities, protection of orbiting hardware, quick access to space, and an overhaul of how America's military and security organizations utilize satellite assets. So far, so good. Particularly the part about "quick access to space." That almost intrinsically implies much-lower-cost access to space. NASA doesn't need it (except for crew rescue, but they have a different, and flawed, plan for that), but the DoD does. Teets said he has started looking at the issue of assured access to space. "When we want to go, we've got to be able to go," Teets said. But in this arena, there are "a couple of disturbing factors," he said. In reviewing the Air Force's Evolved Expendable Launch Vehicle (EELV) program, Teets said, "I find there's some single points of failure." Teets said the RL-10 engine used in Boeing's Delta IV launcher is a worry. "If an RL-10 engine has a significant flight problem, we're going to be down for a while. I'd like to see us move ahead with an effort that would eliminate that single point failure," he said. In the case of Lockheed Martin's Atlas V, that vehicle uses a new Russian-designed and -built Atlas RD-180 engine. Use of rocket engine propulsion technology that is not produced in the United States, and cannot currently be produced in the United States, "troubles me some," Teets said, Well, if he gets the show on the road and develops true fast-response capability (i.e., reusable space transports), EELV will become obsolete anyway. I think that his concern is overblown here. Russia is reasonable, as long as you come with money in hand--Aerojet or Pratt could certainly do a license deal to start manufacturing RD-180s domestically, given sufficient incentive. And to worry about the RL-10, an engine that has been in use in one form or another for almost four decades, with a superlative track record, suddenly coming down with some sort of endemic design problem is a waste of worry resources. What he really needs to be focusing on is how to move beyond EELV and expendables in general (probably difficult, given his Lockmart pedigree). We are not going to get space control from EELV, regardless of how many different engines we have to choose from. But that's the problem, because where he really goes off the rails is when he starts talking about reusables: "Clearly, NASA is looking for a shuttle replacement vehicle. Military space probably doesn't have the same lift requirements [as does] the shuttle replacement," Teets said. Furthermore, while manned space will ultimately be important to the Air Force, "it's probably not the first priority for a reusable launch system," he said. "We all know that when you build manned space into a launch system, it's a really different dynamic," Teets said. "My attitude is to embrace the relationship with NASA?move forward in both NASA's interests as well as national security space interest." Yes, "we all know that." However, what he apparently doesn't know is that when it comes to building reusable transports, putting a pilot in probably makes it not harder and more expensive, but easier and cheaper. "Man-rating" is one of those terms that people throw around in launch vehicle discussions to sound like they're technically sophisticated, but very few people really understand the term, or what it involves, or the proper context for it. Sure, if you're going to strap folks to the top of a piece of expendable munitions, it makes sense to put in an escape system, and to take extra time and dollars to maximize the reliability of the manufactured and assembled vehicle. Particularly since each time it's launched is both the first, and the last time. But when we start talking about space transports, we have to approach it entirely differently. In this case, one expects to get the vehicle back, and the vehicle itself becomes much more valuable and irreplaceable than the crew. The military should certainly be used to the concept of occasionally losing a test pilot--we don't want to infect them with the NASA disease. This is not to say that measures won't be taken to minimize chance of vehicle loss, but they are the same measures that would be taken if it were unmanned, because as the article describes below, they are talking about a vehicle that they expect to cost a couple of billion dollars to replace (though I think that this is a ridiculous number). But the nice thing is that it turns out that vehicles have a lot better chance of coming home if they have a pilot. And there can be a lot of cost savings in not having to design the avionics to be totally autonomous. Boeing doesn't "man rate" their air transports. They simply design and test them to safely carry people, with a flight crew. Space transports will have exactly the same design philosophy. But one wouldn't expect a former Chief Operating Officer of Lockmart to understand that. And they still apparently don't understand how critical it is to get some competition back into this business: The prospect of a joint, Air Force-NASA flight demonstration vehicle has been discussed. One idea is for the two organizations to pony up $900 million each, resulting in a flight demonstrator taking to space in 2006. Termed a "Y" vehicle versus an "X" vehicle, the Air Force would make operational use of the craft following a series of flight tests. $1.8B for a single prototype. Insane. Did they learn nothing from X-33? Apparently that's exactly what they learned... Posted by Rand Simberg at February 21, 2002 12:05 PMTrackBack URL for this entry:
Listed below are links to weblogs that reference this post from Transterrestrial Musings. |