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Making the Brazilian ATR-72 Spin
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Note: This story was corrected on August 10th at 10:23 am, thanks to the help of a sharp-eyed reader.
Making an ATR-72 Spin
I wasn’t in Brazil on Friday afternoon, but I saw the post on Twitter or X (or whatever you call it) showing a Brazil ATR-72, Voepass Airlines flight 2283, rotating in a spin as it plunged to the ground near Sao Paulo from its 17,000-foot cruising altitude. All 61 people aboard perished in the ensuing crash and fire. A timeline from FlightRadar 24 indicates that the fall only lasted about a minute, so the aircraft was clearly out of control. Industry research shows Loss of Control in Flight (LOCI) continues to be responsible for more fatalities worldwide than any other kind of aircraft accident.
The big question is why the crew lost control of this airplane. The ADS-B data from FlightRadar 24 does offer a couple of possible clues. The ATR’s speed declined during the descent rather than increased, which means the aircraft’s wing was probably stalled. The ATR’s airfoil had exceeded its critical angle of attack and lacked sufficient lift to remain airborne. Add to this the rotation observed, and the only answer is a spin.
Can a Large Airplane Spin?
The simple answer is yes. If you induce rotation to almost any aircraft while the wing is stalled, it can spin, even an aircraft as large as the ATR-72. By the way, the largest of the ATR models, the 600, weighs nearly 51,000 pounds.
Of course, investigators will ask why the ATR’s wing was stalled. It could have been related to a failed engine or ice on the wings or tailplane. (more…)
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How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
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In June 2023, the FAA published a 167-page document outlining the agency’s desire to replace dozens of 40-year-old airport control towers with new environmentally friendly brick-and-mortar structures. These towers are, of course, where hundreds of air traffic controllers ply their trade … ensuring the aircraft within their local airspace are safely separated from each other during landing and takeoff.
The FAA’s report was part of President Biden’s Infrastructure Investment and Jobs Act enacted on November 15, 2021. That bill set aside a whopping $25 billion spread across five years to cover the cost of replacing those aging towers. The agency said it considered a number of alternatives about how to spend that $5 billion each year, rather than on brick and mortar buildings.
One alternative addressed only briefly before rejecting it was a relatively new concept called a Remote Tower, originally created by Saab in Europe in partnership with the Virginia-based VSATSLab Inc. The European technology giant has been successfully running Remote Towers in place of the traditional buildings in Europe for almost 10 years. One of Saab’s more well-known Remote Tower sites is at London City Airport. London also plans to create a virtual backup ATC facility at London Heathrow, the busiest airport in Europe.
A remote tower and its associated technology replace the traditional 60-70 foot glass domed control tower building you might see at your local airport, but it doesn’t eliminate any human air traffic controllers or their roles in keeping aircraft separated.
Max Trescott photo Inside a Remote Tower Operation
In place of a normal control tower building, the airport erects a small steel tower or even an 8-inch diameter pole perhaps 20-40 feet high, similar to a radio or cell phone tower. Dozens of high-definition cameras are attached to the new Remote Tower’s structure, each aimed at an arrival or departure path, as well as various ramps around the airport.
Using HD cameras, controllers can zoom in on any given point within the camera’s range, say an aircraft on final approach. The only way to accomplish that in a control tower today is if the controller picks up a pair of binoculars. The HD cameras also offer infrared capabilities to allow for better-than-human visuals, especially during bad weather or at night.
The next step in constructing a remote tower is locating the control room where the video feeds will terminate. Instead of the round glass room perched atop a standard control tower, imagine a semi-circular room located at ground level. Inside that room, the walls are lined with 14, 55-inch high-definition video screens hung next to each other with the wider portion of the screen running top to bottom.
After connecting the video feeds, the compression technology manages to consolidate 360 degrees of viewing area into a 220-degree spread across the video screens. That creates essentially the same view of the entire airport that a controller would normally see out the windows of the tower cab without the need to move their head more than 220 degrees. Another Remote Tower benefit is that each aircraft within visual range can be tagged with that aircraft’s tail number, just as it might if the controller were looking at a radar screen. (more…)
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A New Pilot Shares Aviation with Millions
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Flipping through the channels the other day I paused on Ellen DeGeneres’ talk show because the guest, Zach Braff of Scrubs fame, said a word that caught my ear, “Cirrus.” It seems he’s a new pilot, and to appear on the show, which is taped in California, he flew himself across the nation from his home in New York, and the audience cheered and applauded this announcement.
Saying that learning to fly was the fulfillment of a lifetime dream, Braff showed pictures from his flight, him smiling at a rear-seat passenger from the left seat and the left wing of the Cirrus above a solid blanket of clouds the color of burnished butterscotch in the late afternoon sun. Trying to describe the ineffable feelings of climbing through the layer and being the only living thing in sight all he could says was, “It is amazing.”
Google led me to an article, Super Fly, Braff penned for BestLife, by the editors of MensHealth. Of learning to fly he wrote, “I earned my pilot’s license this past November, and it was one of the coolest moments of my life.”
His enthusiasm for flight and all of its benefits was an early Christmas present in a year buried in coal. As this year, which has not been the kindest to aviation, winds to a welcome close, my holiday hope is that 2010 will embody the enthusiasm of all new pilots and will begin a gentle cruise climb to better days that are peaceful and prosperous because people in all endeavors are working toward a common goal, not fighting each other for a larger slice of a shrinking pie. — Scott Spangler
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Ho, Ho, Ho Jetwhiners
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I can’t believe it’s Christmas time again. Our thanks to the folks at Junior Flyer for this great Santa graphic too.
Scott and I are going to take the rest of the week off to hang out with family, but we both wanted to leave you with a couple of cool things to keep in mind this week while you wait for the arrival of the big guy.
First there’s the NORAD site that tracks Santa on the way to your house. Great fun for the kids. It also brings new meaning to use of the phrase bio-fuel.
And as they approach the North Pole on the way home, they need not worry about the weather as long as their Electronic Flight Back (EFB) is equipped with the proper North Pole approach plates.
Although the folks at GE are very proud of their new Green sleigh for Santa, the union representing the reindeer flight crew are not at all happy about the job losses the new vehicle might well create.
Finally, what would Christmas be without a good FAA flying joke.
Santa is about to take off on Christmas Eve for his annual ride when an FAA inspector approaches him in front of the hangar. “How long has it been since you’ve flown this sleigh,” he asks the Big Guy. “Exactly one year tonight,” Santa replies. “Well,” says the inspector, “I’d say you’re out of currency. We’d better take a ride together.
Wondering of course whether he did indeed turn in his paper certificate for a plastic replacement, Santa invites the inspector aboard. Being pretty quick, Santa couldn’t help noticing the 45 strapped to the inspector’s belt. “Why would you need a gun on a checkout flight?” Santa wondered.
“Well, I’m not really supposed to tell you this,” the inspector replied, “but you’re going to lose one on takeoff.”
Merry Christmas to everyone around the globe. Thanks for reading Jetwhine in this, our third year.
Rob Mark, editor
Technorati tags: General Electric, FAA, Junior Flyer, Jetwhine, NORAD for Santa, airlines, business aviation pilots, flight training, Santa Claus, North Pole, Rob Mark, Scott Spangler -
Planes & Trains: A Cautionary Tale
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After World War II the airlines sealed the fate of railway transportation by offering an equivalent level of reliable, safe service more expeditiously. After more than a half-century of being the only way to go, the airlines grew increasingly dismissive of the people they supposedly served, all but shaking them inverted by the ankles to capture spare-change fees before folding them into a barren tube. And this after the government has disrobed them at the airport doorway. Stir in misguided management focused on quarterly bottom lines, and it’s wonder that the airlines are in decline.
At the same time, the number of people traveling by train has been increasing, its growth limited by its atrophied infrastructure of rails just 56.5 inches apart. In early December my wife and I needed to be in Reading, Pennsylvania, for the wedding of her youngest son and for interviews and photos at the Mid-Atlantic Air Museum for an in-the-works article. Anticipating the multi-flight airline trip with the enthusiasm of a death-row inmate about to roll up his sleeve, on a whim we visited the Amtrak website, which proved a welcome surprise.
Our combined round-trip fare–which included sleeping accommodations and all meals–totaled $580, an amount about equal to the fees the airlines, as best as I could discover, would charge above and beyond the ticket price for baggage and other “services.” Granted, the train travel takes time. The Capitol Limited left Chicago at 1840 Central and arrived in Washington, D.C., the next day at 1340 Eastern. After a 2 hour layover, we’d board the speedy Northeast Regional Acela express for Philly. As railway virgins, we didn’t know what to expect, but we agreed it couldn’t be any worse than flying the airlines. It wasn’t…it was way better, and like many of the people we met along the way, we’ve become railway converts.