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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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Reflecting on Flight Training’s Matriarch
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Evelyn Bryan Johnson died May 10, 2012 in her 102nd year. She was a flight instructor. She stopped counting the number of people she’d taught to fly when the number passed 3,000. A designated pilot examiner since 1952, when I met her in 1997 at her induction to the NAFI Flight Instructor Hall of Fame, she’d given more than 9,000 checkrides.
Diminutive, whippet-thin, with all seeing eyes that didn’t miss much, Evelyn was one of the most unpretentious people I’d ever met, in aviation or out of it. She’d be, I think, as surprised at whose reporting her passing. Google News lists 398 outlets, from NPR and and all the major newspapers, to local Tennessee medial outlets and Sky News Australia. And I’m sure she’d shake her head at the focus of their reports, her total flight time, 57,625.4 hours, according to the The New York Times.
You see, the teacher many called Mama Bird, who finally retired in 2005 at age 95, didn’t really care about numbers. What mattered most was flying, and flying safely, whether she was teaching a newcomer the ways of aviation or examining their skills and knowledge at the end of training. Every flight, she told me later, was an educational opportunity, and that’s what kept aviation compelling.
Evelyn lived most of her life in and above Morristown, Tennessee. In my waning years at Flight Training one of my unfulfilled goals was sitting down with her and the patriarch of flight training, William K. Kershner, who lived, until his death in 2007, a couple of hours to the southwest, in Sewanee, Tennessee. Another unpretentious teacher for whom flying safely and making the most of every educational opportunity mattered most, we talked about getting together often. But our respective schedules never coincided for what I’m sure would have been an epic conversation.
What set these historic teachers of flight apart from the rest was a fundamental tenet of education that seems missing today. At its core, education, aviation or otherwise, really isn’t about curricula or technology. What matters most is the personal, human connection between teacher and student, united in a shared passion for learning. And that the best teachers are really still students who eagerly share what they’ve learned with others. — Scott Spangler
Flight accidents that are the result of negligent behavior may call for an aviation litigation expert like Kansas City Personal Injury Attorney Robb & Robb.
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CFIs Need Career Situational Awareness
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Last week, the middle school where I am a substitute teacher held its annual career and hobby day, where students sign up for presentations that interest them. I was on duty as a student wrangler, not a speaker, and it was happenstance that I ended up with 35 sixth, seventh, and eighth graders interested in aviation.
The presenters were two young flight instructors from a nearby collegiate aviation program. When a non-flying person needs an expert, a CFI is the first choice because being a pilot is something most non-flyers understand, and who best to speak about them than those who teach them to fly. Unfortunately, public speaking, like customer service and sales, is not part of the CFI practical test standards.
Consequently, the kids quickly grew bored with the unpracticed, myopic presentation that rarely strayed far from the presenters’ aviation goals. In fairness, I don’t know how much warning they had about this speaking gig, and they tried their best, but it was a missed opportunity because of a poor situational awareness of aviation careers beyond their airline and corporate aspirations.
My point is that opportunities to get non-flyers excited about professional and recreational aviation to non-flyers of all ages are rare. In most cases, flight instructors are the go-to last-minute speaker. So why not have a presentation, supported with a PowerPoint presentation, on a flash drive? And why not practice it once, so you’re ready for last-minute calls.
Putting together such a presentation is no harder than a lesson plan. All it takes is a little bit of time, accepting that there’s more to aviation than the career carrot you happen to be pursuing, and an Internet connection. Before you start, you should know two things: Who is your audience, and what is the desired focus, professional or recreational flying?