World War II-Era Planes Perform Historic Flyover of National Mall

World War II-era planes will perform a flyover of the National Mall in Washington, D.C., on Friday to mark the 70th anniversary of the allied victory in Europe, or V-E Day.

The event, dubbed the Arsenal of Democracy Flyover, will feature some 55 vintage aircraft, including the iconic P-51 Mustang fighter and the B-17 Flying Fortress bomber. The 50-minute airshow is set to begin 12:10 p.m. local time and will follow ceremonial events at the World War II memorial.

“We’re flying a huge array of aircraft, all vintage of World War II,” said Nancy Kwiecien, a volunteer with the Commemorative Air Force, a Texas-based nonprofit that owns and operates some of the planes participating in the event. “They will be staged in chronological order according to the war.”

The flyover is being sponsored in part by aerospace and defense companies, including Boeing Co., General Electric Co. and Northrop Grumman Corp., among others.

The formations will kick off with trainers and biplanes representing the period leading up to the war, followed by P-40 Warhawk aircraft marking the attack on Pearl Harbor, B-25 Mitchell bombers representing the raid on Tokyo, and B-17 and B-29 bombers marking the air wars in Europe and the Pacific, Kwiecien said. The flyby will culminate with a P-51 missing man formation, she said.

“It’s going to be stunning,” she said. A detailed lineup of the scheduled formations can be found on the event’s website, http://ww2flyover.org/flyover-formations/.

Reporters, photographers, history buffs and even a few World War II veterans gathered on the tarmac to

Article source: http://www.military.com/daily-news/2015/05/07/world-war-ii-era-planes-to-perform-flyover-of-national-mall.html

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New Analysis Can Drastically Reduce an Airplane’s Tarmac Time

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Airplanes spend an awful lot of  time waiting on tarmacs. In some cases, the time a plane spends waiting on the tarmac rivals the flight itself.  A new mathematical tool developed by engineers could change that.

Georgios Vatistas, a mechanical engineering professor at Montreal’s Concordia University, has developed a tool capable of calculating the flow of turbulent air produced by a plane’s wing tips (also known as wing-tip vortices) once it takes off.

The impact of turbulent flow 

“Every aircraft leaves in its wake a turbulent flow of air that can be dangerous to the airplane immediately behind it,” said the professor. “That’s why there are often large separation distances between planes as they line up for takeoff. It’s a major cause of delays on the runway.”

His work could potentially reduce the standard distance between planes on tarmacs. How? Figuring out the amount of turbulence an aircraft produces during takeoff (as a result of wing tips) offers air traffic controllers a better idea of how far airplanes should be from each other.

Analyzing the plane’s specifications 

“This research will place the required separation distance on a better ground, particularly for the huge Airbus [A]380,” said Vatistas, adding that his model “takes the airplane’s specifications into account to develop a more precise picture of exactly how strong the wing tip vortices are. From that, you can accurately calculate how far away the following aircraft needs to be for safety.”

Vatisas says it’s important

Article source: http://www.engineering.com/DesignerEdge/DesignerEdgeArticles/ArticleID/10086/Engineering-Analysis-Shows-How-to-Drastically-Reduce-an-Airplanes-Tarmac-Time.aspx

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WELLS: 13-year cicada ready to appear

One of the nice things about living out in the country is that you can actually hear the sounds of nature. Big trucks, loud motorcycles and junk cars with rusted out mufflers typically aren’t around to drown out the sounds of chirping birds, croaking frogs and buzzing bees. Unfortunately, all of that is about to change.

If Dr. John Cooley of the University of Connecticut is correct, the entire Tri-State is about to witness the emergence of a huge swarm of M. Neotredecim- Brood XXIII to be more precise. For folks like me who barely made it through Biology I in high school, that would be the 13-year cicada swarm. Once cicadas arrive and fire up their mating calls, forget about hearing the birds, bees and frogs or anything else for that matter.

The 13-year cicada should start to emerge a little later this month. According to Dr. Cooley, they will be around for 4 — 6 weeks after they first start emerging from the ground. Most individual cicadas live only a few weeks, but since they emerge over a period of two weeks or so, the whole event lasts longer. The really serious cicada noise will get going about a week and a half after you first notice them and will last about two weeks more.

As you might expect, it’s the male cicada that makes all of the noise. “The males produce `songs’ using a pair of tymbals, or rigid membranes found on the first abdominal segment,” said Dr. Cooley. “The

Article source: http://www.courierpress.com/news/local-news/southern-illinois/len-wells-13year-cicada-ready-to-appear_13566470

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2015 Summer Camps for Kids

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Portable Workbench Is Solid And Space Saving

Last week we covered the topic of electronic work benches. But we know that there’s more to life than soldering irons and tiny components. Sometimes to pull off a hack, you need to get your hands dirty, and get some sawdust in your hair. If you’re limited on space, or need to be able to move to different locations quickly, this shop workbench may just be what you’re looking for.

First, let us preface that this project is not open source. Now before you “boo!” too loudly, the designer [Ron Paulk] only charges $10 for the plans. We think that is a small price to pay for how much though has gone into the design. But hey, if you’re a bit crafty, we bet you could easily reverse engineer the build just from the pictures alone. Personally, we think there are times when it’s a good thing to support a project like this.

The basic design allows the workbench to be very rigid, but light weight. And if you don’t have room for it to be permanently set up, it tears down and stores away nicely. It seems like the plans are well done, but if you need a bit more guidance, there is also a 15 part video series that will guide you along the way (here is the youtube playlist.) Also, there is an overview video after the break.  So what are you waiting for?  Go out and make something!

Article source: http://hackaday.com/2015/05/08/portable-workbench-is-solid-and-space-saving/

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Popular historian David McCullough can’t quite find the real men behind the …

 

The Wright Brothers

By David McCullough

Simon Schuster, 336 pp., $30

David McCullough’s popular biographies of Theodore Roosevelt, Harry Truman and John Adams succeeded with readers because they weren’t about politics or history from a particular point of view, but because they were about real people who happened to be politicians and history-makers.

He brought out the humanity in these iconic figures, although he tamped down Roosevelt’s blood lust, Truman’s suspect background and Adams’ snobbery. Instead, he emphasized their strengths, above all their “American” qualities.

Orville and Wilbur Wright don’t belong in that select company, despite McCullough’s sincere efforts to elevate these hard-working brothers to a lofty place in the American pantheon. His new biography “The Wright Brothers” (Simon Schuster, 336 pp., $30), based on a well-trodden ground of information, refreshes their story in his upbeat, minutely researched manner.

(Tom Hanks recently purchased rights to the book for an HBO miniseries.)

But something’s lacking – interesting characters like Adams, Roosevelt or Truman. While Orville and Wilbur accomplished their goal of powered flight, they missed out on the stuff that makes life interesting – relationships, children, hobbies, fun and most of all, self-reflection.

Instead, it was their sister, Katharine, an Oberlin College graduate and high school teacher who found time, while she managed the household in Dayton and supported her brothers’ airplane projects, to achieve a more rounded life and even married, albeit at 58.

Orville took the marriage hard, McCullough writes, and refused to speak to his sister for

Article source: http://www.cleveland.com/books/index.ssf/2015/05/popular_historian_david_mccull.html

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New Model Could Drastically Reduce an Airplane’s Tarmac Time

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Airplanes spend an awful lot of  time waiting on tarmacs. In some cases, the time a plane spends waiting on the tarmac rivals the flight itself.  A new mathematical tool developed by engineers could change that.

Georgios Vatistas, a mechanical engineering professor at Montreal’s Concordia University, has developed a tool capable of calculating the flow of turbulent air produced by a plane’s wing tips (also known as wing-tip vortices) once it takes off.

The impact of turbulent flow 

“Every aircraft leaves in its wake a turbulent flow of air that can be dangerous to the airplane immediately behind it,” said the professor. “That’s why there are often large separation distances between planes as they line up for takeoff. It’s a major cause of delays on the runway.”

His work could potentially reduce the standard distance between planes on tarmacs. How? Figuring out the amount of turbulence an aircraft produces during takeoff (as a result of wing tips) offers air traffic controllers a better idea of how far airplanes should be from each other.

Analyzing the plane’s specifications 

“This research will place the required separation distance on a better ground, particularly for the huge Airbus [A]380,” said Vatistas, adding that his model “takes the airplane’s specifications into account to develop a more precise picture of exactly how strong the wing tip vortices are. From that, you can accurately calculate how far away the following aircraft needs to be for safety.”

Vatisas says it’s important

Article source: http://www.engineering.com/DesignerEdge/DesignerEdgeArticles/ArticleID/10086/New-Model-Could-Drastically-Reduce-an-Airplanes-Tarmac-Time.aspx

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