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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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Flight Attendants & Waning Aviation Interest
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Last weekend the New York Times published an enlightening piece—63 Years Flying, From Glamour to Days of Gray—about Ron Akana, United Airline Flight Attendant Seniority Number 1. You read that right, he’s been flying for 63 years. Hawaiian born, he was a 21-year-old in a aloha shirt when he was selected from among 400 applicants to fill eight steward positions, one for each of the Hawaiian islands. Above, he’s third from the right.
As expected, the article highlighted the differences in airline flight over his career. What was more interesting—and telling—were the demographics of the industry’s flight attendance corps. Based on his analysis of 2010 census data, University of Texas-San Antonio sociologist Rogelio Saenz revealed that 40 percent of roughly 110,000 FA’s are at least 50, if not older.
Here’s the important part: less than 18 percent of flight attendants are 34 or younger. Seniority equals employment tenure, and Mr. Akana’s service is the textbook example. But I wonder if the ability to work more years is the primary reason why their average age is increasing. In the late 1960s courts finally overturned the airline requirements that female flight attendants had to retire at 32 and quit if they got married or pregnant.
Back in the day, when people dressed up to fly, airlines served real food, and every seat offered first-class room, flying held promise of far flung adventures to romantic destinations. And those were the days when being an airline pilot was also a daydream destination of many youngsters as they looked for a career. Could the dearth of younger flight attendants be an indication related to cyclic shortages of qualified pilots to show that the industry must finally stop living in the past?
At all levels, from flight instructor to flight attendant to airline captain, the industry has relied on a bountiful supply of starry-eyed people who’ve “paid their dues” (saving the airlines millions) because they’d do anything to fly. People starting their careers today don’t possess, from what I’ve read and experienced, any real motivation to make similar sacrifices. For the foreseeable future, the airlines are going to need crews, so it will be interesting to see how the airlines will attract and train them. And as passengers, we must always remember that in every aspect of life, you get what you pay for. — Scott Spangler
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Cross-Country Quiz: ASI & Humble Pie
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It’s been too many years since I was last pilot in command of an airplane, and even longer since I’ve made a cross-country flight. The AOPA Air Safety Institute must have known that flying may well be part of my life in the near future because in an email it asked, “How sharp is your VFR cross-country knowledge?” and a link to its safety quiz.
It asks 10 questions about a 350 mile VFR trip from Fond du Lac, Wisconsin, to Festus, Missouri. As necessary, it provides blow-up sectional chart images on which to search for the correct multiple-guess response. Like most pilots I was pretty confident of my knowledge, even though I haven’t put it into practice for a few years. The result was humbling. If you want to know how badly I blew it, you’ll have to keep reading. Needless to say, there’s a ground school refresher in my future.
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Women are Key to Aviation’s Future
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Did you know that March is Women’s History Month, and that Women of Aviation Worldwide Week started March 5? I didn’t, until a friend shared an e-mail from Penny Hamilton, a pilot with a Ph.D. who’s invested a lot of time studying just about every aspect of Teaching Women to Fly.
If you don’t remember her work, take another look at my post from January 2, 2011, Women & Aviation: Still No Real Change. Things, as most will agree, have not gotten any better since then. (And beyond aviation, of late they have taken another turn for the worse.)
But she and others haven’t quit. In Denver on March 1 Dr. Penny and her research partner, Dr. Marie-Line Germain of Western Carolina University, presented their full research and theory paper at the 2012 Academy of Human Resource Development International Research Conference in the Americas.
Their paper, “Women Employed in Male-Dominated Industries: Lessons Learned from Female Aircraft Pilots, Pilots-in-training and Mixed-gender Flight Instructors,” focuses on problems of exclusion, male-dominated industries, and rethinking human resources development.
During this week, Women of Aviation offers a plethora of activities and contests designed to get females of all ages involved. More important to me is that it welcomes the participation of anyone who believes that aviation would be better off with more women involved, and each one of us can make a difference.
I’ll take that one step further. For the most part, we men haven’t done a very good job of nurturing the pilot population (or the nation). Maybe now is the time to step aside and give women a chance. They certainly can’t do any worse than we have. — Scott Spangler