“There are three barriers particular to civil supersonic flight; sonic boom, high altitude emissions and airport noise. Of the three, boom is the most significant problem,” said Peter Coen, manager of NASA’s High Speed Project with the agency’s Aeronautics Research Mission Directorate’s Fundamental Aeronautics Program.
There’s a fourth barrier not mentioned: the low L/D, which restricts range and makes for high fuel costs. If that problem doesn’t get solved, it will never become a huge market, and will mostly be restricted to business jets.
Democrats are making it worse. Of course, as with racism, unemployment, poverty, education, health care, etc., that’s true about almost everything that they complain about.
It has been amusing to watch the apparent surprise of many climate scientists at their discovery that many “climate sceptics” are actually lukewarmers. Taking a rough and ready definition, that lukewarmers believe in AGW but doubt catastrophic AGW, one could reasonably place many of the more famous sceptics (Liljegren, McIntyre implicitly, Montford, Watts explicitly) in that camp, together with a number of “maverick” climate scientists (Curry, Lewis, Lindzen). Indeed it has long seemed to me that the unspoken position of Klimazwiebel itself has sympathy for lukewarmerdom.
What does not follow from this, however, is Ed’s suggestion that “the debate can crucially move on to what action is needed to deal with a warming planet”. Or to be more precise that is, as it always has been, a reasonable question, but a perfectly reasonable answer at the moment would be “little or nothing”. Many lukewarmers are also “policy sceptics”, and their view that current policy responses are hopelessly ineffective, with costs far exceeding any conceivable benefits, remains unchanged.
And straying briefly into more dangerous territory, lukewarmers can and do remain highly critical of the IPCC, the hockey stick, the climategate fiasco, the Lewandowsky nonsense, and the bizarre idea that sceptics are a bunch of “fossil fuel funded deniers”. True peace in our time requires mainstream climate science to acknowledge a few uncomfortable truths.
…As is discussed here often, the most powerful misconception of the climate debate is that is divides on the proposition ‘climate change is happening’. This is presented as a scientific claim, though when one tries to understand what it means, and what its consequences are, unpacking it reveals that it means precisely nothing, and the consequences might mean anything between a trivial change in the weather, through to the collapse of civilisation and the end of all life on Earth. This ambiguity turns nuanced arguments and analyses into cartoons, and would seem to put Lewis and Crok opposite the GWPF, who have published broad criticism of climate policy and also of some particular scientific questions. Worse, this tendency allows politics or ‘ideology’ to be presented as ‘science’, and so to preclude debate. All Ed Davey has to do, for instance, to wave away criticism of his energy policy is claim that it is the expression of denial of climate science. Grundmann’s thinking is no more sophisticated.
[Emphasis added]
As Benny Peiser says, the lukewarmer skeptics are trying to promote an open debate. The warm mongers are trying to shut it down. Mann’s legal action against me and Mark is part of that effort.
There is no nice, clean line between private “buck making” and high-minded government exploration just for the sake of it. From the Wright Brothers making the key advances in aviation to IBM funded Nobel Prize winning basic research, innumerable breakthroughs in science and technology have been led by private non-governmental ventures.
Yes. It’s the post-war government funding that’s been an anomaly, historically. Fortunately, when it comes to spaceflight, that era is ending.
Launches of NASA cargo to the International Space Station, including one planned early Sunday, don’t guarantee SpaceX is ready to launch military satellites, the head of Air Force Space Command said Tuesday in Cape Canaveral.
If a rocket failed, the loss of a national security satellite potentially worth more than $1.5 billion would be a bigger setback than losing food, clothing and other station supplies, Gen. William Shelton told the National Space Club Florida Committee.
“So there’s a big difference,” he said.
This is one reason that talk about “human rating” an Atlas (or Delta) is silly. If it’s reliable enough for a $1.5B satellite, it’s reliable enough to carry crew. All it ever needed was failure onset detection. And when SpaceX starts flying crew, the general’s argument will be much less strong.