“Even though the surface winds were pretty weak, there was a low-level jet above the mountains,” says Craig Clements, a fire weather researcher (and fire chaser ) at San Jose State University.
The skycrane is outfitted with eight small engines that start firing when the rover is about half a mile up to rapidly slow its fall to just a few miles per hour.“These particular engines are actually a derivative of the original engines developed for Viking landers in the early ’70s, but we've made very significant upgrades,” says Fred Wilson, a propulsion expert at Aerojet Rocketdyne, the company that made the propulsion system for the Perseverance landing system.
But if these staged systems could be rolled up into one engine, the huge efficiency gains would dramatically lower the cost of getting to space.When Davis founded Mountain Aerospace Research Solutions in 2018, no one had ever made a working air-breathing rocket engine before.
Wishbone is a site that lets you make an online poll; this week a hacker put 40 million of its user records for sale on the dark web.
It will also be the centerpiece of SFO’s plan to protect itself from the steady rise of San Francisco Bay. Since the 1980s, SFO has installed a variety of features to protect itself from the risk of flood associated with rising waters, including berms, concrete walls, and the kind of sheet piling construction projects use to keep water out of building sites.
That red button is easily accessible from both the front seats and the passenger seats behind them, and Safe Return is hardwired into the $2 million Vision Jet’s controls, using autopilot functionality and the small jet’s simplified engine management system to steer the aircraft to a smooth landing and brake to a stop.
Brains are cleaning and planes are intervening, but first: a deadly Halloween cartoon .Here's the news you need to know, in two minutes or less.Scientists now know how sleep cleans toxins from the brain.
The smallest of small turbines could power a light business jet or serve as auxiliary power units in larger aircraft, starting the bigger engines and supplying electricity when parked at the gate.
Jet lag could be a thing of the past, Neanderthals may have been smarter than we thought, and the feds took down a massive child-porn site on the dark web.
The two 737 MAX crashes that killed 346 people and led to what is, so far, a six-month grounding of the jet , stemmed in part from Boeing’s failure to accurately anticipate how pilots would respond to a malfunctioning feature that pointed the jets toward the ground.
The two MAX jet crashes—on Lion Air in October and Ethiopian Airlines in March, which together killed 346 people—happened just minutes into each flight, while the planes were climbing to their cruising altitude.
That means the pilot can control the suit by just changing the arm positions and not even having to adjust the jet engine thrust. Here is a diagram looking from the side of the flying Iron Man:Notice that there is now a forward component of force from the back jet.
The solution, then, is twofold: Boeing started by warning airlines that the MAX’s angle of attack sensors had malfunctioned before, that such a failure could lead the MCAS to push the plane’s nose down, and that pilots could safely defuse the problem by cutting off the trim system and working the plane manually.
Altrendo Travel/Getty Images An Ethiopian Airlines Boeing 737-800 MAX crashed into the ground Sunday morning after taking off from Addis Ababa, killing all 157 people aboard.
Protesters hold a banner reading Change the System not the Climate during the Rise for the Climate march in Paris on 8 September 2018. I have had a long and happy life but what am I leaving my great-grandchildren?
High up on a melting Greenland glacier, at the end of this summer from climate hell,two young women shout a poem above the roar of the wind. ‘Hoping to rouse more of the world to action’ … Jetnil-Kijiner and Niviana in Greenland with Bill McKibben Photograph: 350.org
HP's New 3-D Printers Build Items Not of Plastic but of SteelHP is hoping its new Metal Jet 3-D printers will provide inroads into manufacturing sectors such as automobiles and medical devices.HPWhen you think about 3-D printing, chances are you think of little plastic doodads created by desktop devices like those made by MakerBot. Computing and printer giant HP wants you to think about metal.Today the company announced the Metal Jet printer, an industrial-scale 3-D printer that builds items not of plastic but of steel.3-D plastic printing is widely used for custom items such as prosthetics and hearing aids, and by product designers for prototyping.
Nalan Koc, research director of the Norwegian Polar Institute, said: “The jet stream becomes wavier, meaning that colder air can penetrate further south and warmer air further north.”Erik Solheim, head of the UN Environment, said: “What we once considered to be anomalies are becoming the new normal.“Our climate is changing right in front of our eyes, and we’ve only got a short amount of time to stop this from getting significantly worse.”