Elon Musk’s idea for commercial rocket travel on Earth would be a logistical nightmare
September 30, 2017 by admin
Filed under Latest Lingerie News
Comments Off
Elon Musk is obsessed with traveling between any two points on Earth in less than 30 minutes. Whether by hyperloop (above and below ground) or interplanetary rocket, the billionaire technologist is convinced that no trip between any two cities on the planet should last longer than an episode of The Big Bang Theory.
His frustration with our current outdated methods of transportation is understandable. After all, we’ve been stuck with four modes of travel (road, air, water, and rail) for almost a century. Why not think bigger? No one can ever accuse Musk of thinking small about, well, anything. And while throwing cold water on his ideas has become a media cottage industry unto itself, his latest pitch to connect cities by suborbital rocket needs much closer scrutiny.
Musk himself was pretty light on details when he proposed the idea at the tail end of his speech at a space industry conference yesterday. Basically, it boils down to using SpaceX’s forthcoming mega-rocket (codenamed Big Fucking Rocket, or BFR for short) to lift a massive spaceship into orbit around the Earth. The ship would then settle down on floating landing pads near major cities. Both the new rocket and spaceship are currently theoretical, though Musk did say that he hopes to begin construction on the rocket in the next six to nine months.
He didn’t say much about the enormous risks passengers would face by boarding one of these rockets for a breezy trip from Shanghai to Paris or Dubai. SpaceX has been successfully landing its Falcon 9 rockets for more than a year, but getting there involved many explosions. (Just check out this recent blooper reel.) There have been more successes than failures, but still, the current rate in which Musk’s rockets explode is unacceptable for any commercial standpoint. A dramatic increase in passenger safety would be needed before anyone would feel safe enough stepping on board a SpaceX rocket.
The stresses of spaceflight, even during short trips, are also daunting to consider. Will people be willing to put their bodies through this kind of experience, just to shave a few hours off their trips? From a physics standpoint, what Musk is proposing is certainly achievable. We have intercontinental ballistic missiles capable of being fired into orbit and then detonating warheads at a target on Earth in about 30 minutes. Why not humans?
“You can’t fly humans on that same kind of orbit,” Brian Weeden, director of program planning for Secure World Foundation, told The Verge. “For one, the acceleration and the G-forces for both the launch and the reentry would kill people. I don’t have it right in front of me, but it’s a lot more than the G-forces on an astronaut we see today going up into space and coming back down, and that’s not inconsiderable.”
Another problem with ballistic trajectory is radiation exposure in the vacuum of space, Weeden added. To be sure, astronauts on the International Space Station are largely shielded from this radiation, thanks to Earth’s magnetic field, which deflects most of the deep-space particles. But his indifference toward the impact that these interstellar concepts would have on human bodies is classic Musk.
Cost is another huge hurdle. Musk claimed these rocket trips would be as inexpensive as commercial air travel. But that assumes a level of scale that is particularly hard to fathom. A recent study by the US Air Force found that reusable rockets were good for about 100 flights, while commercial airplanes could stay in operation for up to 10,000 flights. As such, Musk’s point-to-point rockets are “probably going to be 10 times the cost per-seat,” said Charles Miller, president of NexGen Space LLC. “He may be 1-in-10,000 [for] loss of vehicle, but it’s nowhere near the 3-and-10 million reliability of airlines.”
While the idea of a $10,000 ticket for a 30-minute flight from New York to Shanghai sounds strangely reasonable, it won’t help Musk sell the concept as travel that’s accessible to everybody. Instead, we find ourselves in familiar territory: Silicon Valley proposing a revolutionary idea that will most likely benefit wealthy VCs, billionaire industrialists, and no one else.
This is not a new idea that Musk created out of thin air. Space experts, engineers, and government risk assessors have been pondering the idea of commercial space transportation for decades, but the idea has gained steam since the supersonic Concorde was decommissioned in 2003. In 2008, the International Space University of Strasbourg, France, published a report documenting its appraisal of point-to-point transportation technology. Two years later, the US Department of Transportation submitted its own assessment. Both documents outlined the enormous technological, financial, and regulatory challenges to setting up a commercial space travel network between cities.
One of the most striking conclusions to come out of the DOT paper is the effects this type of futuristic travel could have on pilots. “The pilot will have to deal with activities ranging from direct control of the vehicle to oversight and situational awareness to planning,” the paper’s author, Ruth A. MacFarlane Hunter, a national expert on logistics and emergency management and a registered professional aeronautical engineer, wrote. “The much larger array of instruments and situations may require the pilot to quickly shift to a different activity using different instruments.”
This type of display, and the responsibilities of taking off and landing an interplanetary rocket full of men, women, and children, might be too much for normal pilots to handle. In fact, it could cause the pilot to have a total nervous breakdown.
“In this environment, the pilot may be subject to confusion and cognitive overload,” Hunter concluded. “With a suborbital vehicle, which also must operate in normal airspace, this array of shifting requirements could be more difficult than that previously encountered.”
We need visionaries to motivate us as a society. But Musk’s approach has always been more fatalistic than inspiring. “There are a lot of problems in the world,” he said at the end of SpaceX’s hyperloop competition last month, “and if we don’t have things that inspire us, what’s the point of living?”
Share and Enjoy
Many arrested in recent immigration sweep were not violent offenders
September 30, 2017 by admin
Filed under Latest Lingerie News
Comments Off
During a sweep this week targeting so-called “sanctuary cities,” immigration officials arrested almost 500 immigrants, relatively few of whom were involved in violent crimes, according to federal numbers.
A list provided by U.S. Immigration and Customs Enforcement shows more than 300 of those arrested had previous criminal convictions. By far the most common conviction was driving under the influence. The 86 DUI convictions, when combined with those with other traffic offenses, accounted for nearly a third of the crimes tabulated by ICE.
The numbers paint a somewhat different picture from that outlined by Attorney General Jeff Sessions. In July, Sessions criticized cities with immigrant-friendly law enforcement policies. He said steps the Trump administration was taking to discourage sanctuary policies would help officials “take down MS-13 and other violent transnational gangs, and make our country safer.”
Some of those arrested in this week’s sweep did have violent prior felony convictions, for offenses like assault and robbery. One individual was convicted of rape. A dozen had domestic violence convictions. Several had convictions for sex offenses, some involving minors. Eighteen were considered to be gang members or affiliates.
But others had prior convictions as minor as trespassing or disorderly conduct, or illegal entry, which is a misdemeanor. Several of those with non-violent offenses had drug-related convictions.
Chris Newman, legal director for the National Day Laborer Organizing Network in Los Angeles, characterized the immigration enforcement sweeps as political.
“The way they politicize these enforcement operations is precisely intended to evoke fear, intended to have citizens become afraid of immigrants, and to have immigrants become afraid of ICE,” Newman said.
Federal officials have conducted immigration sweeps for years, and have highlighted the arrests of people with criminal convictions, including those with minor ones.
After some jurisdictions began limiting cooperation with ICE in recent years during the Obama administration, immigration officials prioritized people with criminal convictions released from local jails.
This week, however, the immigration officials with the Trump administration made clear that they were targeting what they called “sanctuary” cities like L.A. with immigrant-friendly police policies, including not detaining immigrants for federal agents beyond their legally required release.
Acting ICE Director Thomas Homan harshly criticized such cities in an statement following the recent arrests: “Sanctuary jurisdictions that do not honor detainers or allow us access to jails and prisons are shielding criminal aliens from immigration enforcement and creating a magnet for illegal immigration.”
Steven Camarota, with the Center for Immigration Studies, a Washington, D.C. think tank that advocates for tighter restrictions, defended the Trump administration’s enforcement actions.
“They would say they are not politicizing it,” Camarota said. “They are doing it unapologetically, which the previous administration was not.”
Camarota said in his view, any kind of offense should warrant deportation.
“Getting rid of people with criminal convictions, even if those convictions are only trespassing and invasion of privacy, still seems reasonable,” he said.
Among those arrested by ICE agents were more than 180 immigrants who did not have any criminal convictions.