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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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Above & Beyond: Volunteer Pilots Fight for Israel
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Trailer for Above and Beyond.Wandering through the recently added titles to Netflix’s “watch now” films the other night, I came across Above and Beyond, a documentary about the birth of what became the Israeli Air Force during the nation’s 1948 fight for survival. (It’s also available on-demand and through iTunes.)
And that’s about all I knew about this chapter of aviation history. But after watching this comprehensive recounting of events, including interviews with the surviving aviators, my initial reaction was, Why haven’t we heard more about this! It is a story far more compelling than the American Volunteer Group (AVG) that fought, as the Flying Tigers, for the Chinese early in World War II.
The AVG had the wink-and-nod support of the U.S. Government. The American volunteer pilots, ground crews, and others who volunteered to fight for Israel not only risked their lives, their U.S. citizenship was also on the line. Al Schwimmer (that’s him, left), the American businessman who bought surplus U.S. C-46 cargo planes, among others, and illegally hopscotched them around the world to Israel, lost his. Staying in Israel, he founded Israel Aircraft Industries, and in 2001, President Clinton pardoned him.
Most of the U.S. volunteer pilots, like Milton Rubenfield, father of the actor we know at Paul Rubens (nee Pee-wee Herman) were Jewish, but a number of them were not. And irony does not begin to describe their first fighter aircraft, Czech-built Messerschmitt Bf-109 with engines coming from a variety of aircraft described only as “bombers.” Later, they replaced them with Spitfires, and a surplus B-17 was its bomber.
The nascent Israeli Air Force was small, but it made a difference. It’s a compelling story too long overlooked, and as a documentary, Above and Beyond sets a new standard of excellence. And some of its best parts are the interviews with the pilots who risked it all. Now in the deep winter of their lives, they all still possess—and exhibit—the self-confident swagger that led them to volunteer for what many in 1948 was sure to be a lost cause. I may watch it again tonight. — Scott Spangler, Editor
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United Airlines: Time to Stop Just Talking About Customers
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Over the last 20 years, we all listened to one United CEO after another talk about how much they value their customers.
Enough talk.
United’s new CEO Oscar Munoz needs to stop the talking and start showing customers if the carrier ever really wants to again be great. Give a listen and tell me what you think.
Rob Mark, publisher
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Labor of Love: Capturing Veteran Leather
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When John Slemp came to the JetWhine.com lunch at EAA AirVenture 2015, he carried with him a large flat package that was maybe 20 by 24 inches by an inch deep and wrapped in brown paper. At such gatherings, most people just show up with their appetites, and as we later learned, John did, too, and it was wrapped in brown paper.
John is a commercial photographer with more than two decades of experience who, since 2001, has specialized in aviation. But his commercial work pays for his labor of love, photographing the decorated veteran leather flight jackets from conflicts past. And when they are still with us, and able to sit for his camera, the veterans who wore the iconic U.S. Army Air Force A-2 and U.S. Navy G-2 flight jackets. In the brown paper were several mounted prints of these spectacular images.
So far he’s photographed 31 pieces of veteran leather, and when he reaches his goal of 50, he plans to publish a book that will really be about, he said, the veterans who wore the jackets pictured. The Smithsonian National Air & Space Museum, the National Naval Aviation Museum, and others have opened their closets to the project that began at a meeting of EAA Chapter 690 in Lawrenceville, Georgia, with the jacket pictured above. (You can see more at John’s website, Aerographs Aviation Photography website.)