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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.
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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Has Technology Killed the Art of Flying?
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When he passes through town, a friend, a long-time CFI and designated pilot examiner, calls so we can catch up over coffee. Like many people today, pilots or not, an iPad seems permanently attached to my friend. Curious, I asked how many applicants flew with iPads. Many of them, and their number is growing, he said. His first checkride question to them was about their backup for the digital charts. If they don’t have one, the checkride is over. His backup? His iPhone, which runs the same software on the smaller screen.
Overwhelmed by his enthusiastic itemization of the iPad’s aeronautical benefits, an important question did not occur to me until I was halfway home. How has this technology affected the new pilot’s mastery of the art of flight? Certainly, all who pass stay within the parameters specified by the appropriate practical test standards. But I’m curious to know whether pilots are bouncing between these limits like a tumbling numbered globe in the Powerball barrel or fly a specified altitude, course, and speed with variations of plus-or-minus nothing?
Technology can be a wonderful tool, but seduced by its reliable perfections, too often people, not just pilots, surrender their responsibilities to it. And therein lies the problem. Mastery of the aviation arts relies more on how pilots think, how they combine information from every available information source and bodily sense, than it does the control inputs derived from this metaphysical process. Technology is only as “smart” as the people who programmed it. It tells us what to think, not how to think. Perhaps it’s time to resurrect, with a modification, an admonition from my youth: Question Technology!
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Building Community is the Secret of Flight School’s Success
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The day after Thanksgiving, Sporty’s Academy shared news of a week that any flight school would love to have, four first solos, two new private pilots, two new commercial pilots, and a new flight instructor. The cooperation of Mother Nature made it possible, said Eric Radtke, academy president and chief flight instructor.
Radtke summarized the secret to Sporty’s success in the release’s second paragraph: “The fact that so many of our customers and staff were able to participate in the cutting of the shirt tails and other celebrations made it that much more special and created a wonderful sense of community.” The italics are mine.
Community, Radtke continues, has consistently provided three-quarters of of the school’s new customers since it opened in 1987. They come from personal, word-of-mouth referrals Sporty’s earned by delivering a good product to their customers. First-class flight training is, obviously, a big part of the product, but another critical component is building community by eagerly and honestly welcoming the newcomers into aviation society.
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Taking Measure of a Life in Aviation
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Beyond the kids, one of the pleasures of substitute teaching at Omro High School is talking with its principal, Brett Steffen. Infected in adulthood, he’s got a chronic case of aviation passion. I like it when he stops by during my student-free planning period because our airplane conversations are almost always thought provoking.
In the course of a conversation just before the Thanksgiving break, logbook tallies of total flight time and the number of different aircraft makes and models flown came up in some context now forgotten. Although he didn’t say it, I got the feeling that as a new pilot still building these aviation measurements, that he felt not quite equal to those with more experience. But he shouldn’t feel that way, nor should any pilot at any stage of their life in aviation.
What matters more to me is participation, and sharing what we’ve learned with others who share our interest in flight. The numbers in my logbook are inconsequential to the scores of aviators and enthusiasts who have taken the time to inspire, to influence, to teach, to reteach, to mentor, and to share the educational moments of their lives and, in the process, to change the course of my life.