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Pork Versus Pork Congressman Dave Weldon (R-FL), in whose district the Kennedy Space Center (KSC) resides, is upset with his colleagues in the Senate. Some of them apparently want to develop the Wallops Island launch facility (WFF in the letter below) in Virginia (currently used to launch small rockets) as a potential rival to Cape Canaveral and KSC. I was very disappointed to discover that the Senate's FY 2003 VA-HUD Independent Agencies appropriation bill contains language that acknowledges Wallops Flight Facility (WFF) as the "launch and recovery site for next generation launch vehicles" and directs Marshall Space Flight Center (MSFC) to utilize WFF "as a site for testing and demonstration of new launch vehicles and technology development." Note the courtesy copy list: governor of Florida (and brother of the President) Jeb Bush, the center directors at Kennedy itself, and Marshall (which is supposedly in charge of developing new launch systems), the commander of the Air Force bases at the Cape, and the director of the organization responsible for developing Kennedy into a commercial spaceport. He means business. And it's not just a defense of his home-state pork in preference to shifting taxpayer funds to the Commonwealth of Virginia (though it certainly is some of that). The KSC facilities really are corroding away and sometimes literally falling down around workers' ears, though it's not as bad as the situation in Russia. But there's an assumption in this whole brouhaha that is not necessarily valid. The senators who want to move the money to Wallops and Congressman Weldon agree on one thing--they assume that spaceports of the future will be like those of the past, and that the "next-generation launch vehicle" will require a facility like that currently existing at the Cape. Back in the olden days of rocketry yore, all rockets, even successfully-launched ones, routinely dropped hardware along their flight path as they departed from the launch pad and headed downrange into orbit. Thus, it made sense to put launch sites on sea coasts, where they could carpet with spent rocket stages the bottom of the Atlantic ocean rather than, say, Chicago. This was particularly the case for rockets like the Titan series, that would cause damage not only from the impact itself, but from the residual toxic propellants that they carried. There's a huge environmental cleanup problem in Kazakhstan that resulted from the large quantity of rocket detritus from Soviet launches out of Baikonur. Another feature of old (and current) rockets is their extensive infrastructure requirements in the form of high-bay assembly buildings, and launch pads, and the need for extensive clear area around them, both for protection against the chance of an explosion on the pad, and because of the tremendous sound levels that a rocket emits at liftoff. The existing ranges also have a function called "range safety," which, perversely, is the name for a guy whose job description is to watch the launch while sitting close by a button that can blow the rocket to smithereenies if anything goes wrong. But these requirements are one of the things that make previous (and current) generation launch vehicles expensive, unreliable and unwieldy. A next-generation launch vehicle, if it's worthy of the name, should take an entirely different approach to launch operations, and if it does so, most of what we think we know about requirements for spaceports is wrong. This is bad news for both the Cape and Wallops Island. For one thing, unless it's having a really bad day, it won't be shedding parts downrange, any more than aircraft do. Space transports will be fully reusable, or they won't be affordable. And there will be no "range safety devices" (a euphemism for explosive charges to blow up the vehicle) in space transports for the same reason that we don't put them in air transports--the vehicle (and its contents) are too valuable to simply destroy it if it seems to be off course. If some of the concepts for new space transports pan out, they will perhaps take off horizontally, with much lower thrust, and much less noise, and they won't sit on scarce and expensive launch pads for weeks or months, but take off on standard runways. Payloads will be integrated into removable cargo canisters, and cargo and passengers will be loaded into them on a tarmac, rather than in high-bay assembly buildings. If that's the case, the spaceports that support them could be almost anywhere--not just at verges between land and ocean, launched from government-subsidized facilities, with men hovering over buttons that will destroy them at the slightest variation from plan. And if they don't pan out, the phrase "next-generation launch vehicles" will be an empty and meaningless one, and they'll be little better--in terms of cost, reliability and routine operations--than current-generation launch vehicles. And space, even near-earth space, will remain a region little visited, and extremely sparsely populated. And the promises made to the children of Apollo will continue to be needlessly unfulfilled. I'm sure that Congressman Weldon, and the other supposed representatives of the people, would like to see near-earth space filled with life, and love, and they'd like to see expeditions setting off from earth-orbital ports to the distant planets, to explore and seek out new homes for humanity, providing life insurance for our fragile planet. But I fear that, if that vision means fewer jobs in their states and congressional districts, the vision will be sacrificed for the jobs, because that's the way of the government's space "program..." Posted by Rand Simberg at July 31, 2002 09:15 PMTrackBack URL for this entry:
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Comments
One point you didn't mention, which argues for KSC over Wallops, is the momentum benefit from near-equator launches. This wouldn't be important for short suborbital flights, but for placing satellites in prograde orbits the launch facilities ought to be close to the equator if possible. Posted by Dave at August 1, 2002 04:03 PMYes, that's true, at least for low-inclination orbits. But I wasn't really arguing Wallops versus KSC--I was arguing Wallops and KSC versus some other place with less stringent requirements. Posted by Rand Simberg at August 1, 2002 05:28 PMThere is one good reason for using coastal spaceports in the short term: noise. Concorde is still banned from flying overland at supersonic speeds in the US because of sonic booms. It seems unlikely the FAA wil allow RLV's to do this initally, and when they do allow it local residents will kick up a fuss about the noise. (You should see the reaction over here in the UK to plans to enlarge our airports). Posted by Andy at August 2, 2002 03:43 AMAndy's comment makes me wonder how much flak NASA gets over the sonic booms when shuttles come in on approach. Those things aren't limited to the immediate vicinity of the landing sites -- I've heard them in Sacramento (landing at Edwards) and here in metro Atlanta (KSC's landing strip). Of course, booms aren't near as rough as launch noise... Posted by Kevin McGehee at August 2, 2002 07:58 AMIf you have a cruising first stage (like Kelly's towing concept, or the Pioneer aerial refueling concept) there's no need to go supersonic until well away from the takeoff point. The boom on entry is minimized by transitioning back to subsonic at a fairly high altitude, though that would be more of a problem. Posted by Rand Simberg at August 2, 2002 08:23 AMSonic booms (along with Nike missles) were one of the delights of my youth, in a long-ago age when defense against Soviet bombers had priority. Lets bring them back. Posted by John Weidner at August 2, 2002 09:33 AMHey, maybe we can set up a spaceport here in NY. Certainly wouldn't have a problem with XCOR-type vehicles - any horizontal take-off craft should be ok. If we build lots of spaceports, maybe they'll actually get used? Posted by Arthur Smith at August 2, 2002 10:13 PMWhile growing up in Sacramento, I and about 250,000 of my neighbors were frequently treated to the prolonged roar of rocket motor testing at Aerojet-General's site about 20 miles away. Most people, especially if they lived that far away from it, had no problem with the noise. Until the last ten to fifteen years the areas closest to the test sites were open land, mostly cattle grazing. More recently the area has filled in, and although the location of the test site is still owned by Aerojet or its successor, I don't think they test rocket motors there anymore. I think I'd kind of like to hear it again. It sounds like ... the future. (I also used to like the test scrambles of B-52s from Mather AFB, but that's another story...) Posted by Kevin McGehee at August 3, 2002 06:05 AMPost a comment |
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