Visual Signals/US Army The first update in 30 years to the US Army ” Visual Signals ” (PDF) manual has just been issued. It’s filled with black-and-white sketches on how in-the-field soldiers can signal events to one another—from warning about a “nuclear hazard present” to “take a knee.” The military notes that, for the most part, the signals apply to “both men and women.” Efficient combat operations depend on clear, accurate, and secure communication among ground units, Army aviation, and supporting Air Force elements. Control and coordination are achieved by the most rapid means of communication available between Soldiers and units. When electrical and/or digital means of communication are inadequate, or not available, a station-to-station system of visual communication is an alternate means for transmitting orders, information, or requests for aid or support. The Army notes that the signals are not a panacea for when electronic communications run dry. For starters, they are “vulnerable to enemy interception,” and their effectiveness is “significantly reduced during periods of poor visibility, and when terrain restricts observation.” Read 1 remaining paragraphs | Comments
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Gallery: US Army “Visual Signals” manual gets first update in 30 years
From Hollister, California — population 40, 000 — comes a good update from the Mercury News on Larry Page’s efforts to fund a flying car: Even from a few hundred yards away, the aircraft made a noise strikingly different from the roar of a typical plane. “It sounded like an electric motor running, just a high-pitched whine, ” said Steve Eggleston, assistant manager at an airplane-parts company with offices bordering the Hollister Municipal Airport tarmac. But it wasn’t only the sound that caught the attention of Eggleston and his co-workers at DK Turbines. It was what the aircraft was doing. “What the heck’s that?” saleswoman Brittany Rodriguez thought to herself. It’s just hovering.” That, apparently, was a flying car, or perhaps a prototype of another sort of aircraft under development by a mysterious startup called Zee.Aero…one of two reportedly funded by Google co-founder Larry Page to develop revolutionary forms of transportation… A Zee.Aero spokeswoman said the firm is “currently not discussing (its) plans publicly.” However, a Zee.Aero patent issued in 2013 describes in some detail an aircraft capable of the hovering seen by people working at the airport. And the drawings showcase a vision of the future in which flying cars park in lots just like their terrestrial, less-evolved cousins. Page has invested $100 million in Zee.Aero, which appears to have hired more than 100 aerospace engineers. But the article reports that apparently, in the small town where it’s headquartered, “the first rule about Zee.Aero is you don’t talk about Zee.Aero.” Read more of this story at Slashdot. 
An anonymous Slashdot reader quotes the Washington Post: Less than two months after declaring the controversial F-35 Joint Strike Fighter ready for combat, the Air Force on Friday announced that it was temporarily grounding 15 of the jets after it discovered that insulation was “peeling and crumbling” inside the fuel tanks. The setback is the latest for the $400 billion system, the most expensive in the history of the Pentagon. The problem comes as the program, which for years faced billions of dollars in cost overruns and significant schedule delays, had begun to make strides. The insulation problem affects a total of 57 aircraft, the Air Force said, 42 of which are still in production… In a statement, Lockheed Martin said that “the issue is confined to one supplier source and one batch of parts.” It emphasized that “this is not a technical or design issue; it is a supply chain manufacturing quality issue…” It is unclear how long the aircraft would be grounded, how long the problem would take to fix or what the larger affect on the program would be. âoeWhile nearing completion, the F-35 is still in development, and challenges are to be expected, ” said an Air Force spokeswoman, adding “The F-35 program has a proven track record of solving issues as they arise, and we’re confident we’ll continue to do so.” Read more of this story at Slashdot. 
Curious about just how far they could take the company’s additive manufacturing technology, engineers at GE Aviation’s Additive Development Center in Cincinnati successfully created a simple jet engine, made entirely from 3D printed parts , that was able to rev up to 33, 000 RPM. Read more… 
You’re on a plane. The oxygen masks have dropped. While you’re screaming and crying, does it occur to you to wonder where that oxygen comes from? It’s not a scuba tank. Here’s how weed killer, fireworks, and candy destroyers keep you alive. Read more… 
In 1937, Amelia Earhart’s plane, the aluminum-clad Electra, disappeared somewhere over the Pacific during the course of her global circumnavigation attempt. Now 77 years later, historians and aviation experts are confident they have found a part of her downed aircraft . Read more… 
An anonymous reader writes Iceland’s authorities have raised an aviation warning for a region close to the Bardarbunga volcano after a small fissure eruption in the area. The eruption began around 0600 GMT prompting the Icelandic Met Office to raise the aviation warning code to red for the Bardarbunga/Holuhraun area, the Department of Civil Protection and Emergency Management said in a statement. The country’s meteorological agency described the eruption as a “very calm lava eruption and can hardly be seen on seismometers.” Read more of this story at Slashdot. 
coondoggie (973519) writes “Call it the ultimate auto-pilot — an automated system that can help take care of all phases of aircraft flight-even perhaps helping pilots overcome system failures in-flight. The Defense Advanced Research Projects Agency (DARPA) will in May detail a new program called Aircrew Labor In-Cockpit Automation System (ALIAS) that would build upon what the agency called the considerable advances that have been made in aircraft automation systems over the past 50 years, as well as the advances made in remotely piloted aircraft automation, to help reduce pilot workload, augment mission performance and improve aircraft safety.” Read more of this story at Slashdot. 
MTorrice writes “Lithium-sulfur batteries promise to store four to five times as much energy as today’s best lithium-ion batteries. But their short lifetimes have stood in the way of their commercialization. Now researchers demonstrate that a sulfur-based polymer could be the solution for lightweight, inexpensive batteries that store large amounts of energy. Battery electrodes made from the material have one of the highest energy-storage capacities ever reported” Litihium Ion batteries should maintain capacity for about 1000 cycles, whereas Lithium-sulfur batteries traditionally went kaput after about 100. But it looks like they are getting pretty close to something feasible, from the article: “The best performing copolymer consisted of 90% sulfur by mass. Batteries using this copolymer had an initial storage capacity of 1, 225 mAh per gram of material. After 100 charge-discharge cycles, the capacity dropped to 1, 005 mAh/g, and after 500 cycles it fell to about 635 mAh/g. In comparison, a lithium-ion battery typically starts out with a storage capacity of 200 mAh/g but maintains it for the life of the battery, Pyun says.” Read more of this story at Slashdot.