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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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Aviation and Communications still don’t seem to work in the same sentence
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The aviation industry has a history of some pretty repulsive communications efforts aimed at customers and employees, like charging an airline’s best clients the highest possible ticket prices when those customers needed them most … at the least minute.
For years, business travelers shook off the indignity of being not simply platinum flyers, but platinum payers as well.
Then came the tsunami of low-cost carriers that helped the legacy carriers decide they wanted to be our friends again. Perhaps friends is a bad choice of terms since no one would subject friends to airline travel today. Let’s say the legacies are trying to maintain market share.
On the labor side, the debate still focuses on whether unions exist to keep airline management at bay, or whether management reacts to labor out of pure defense.Regardless of your perspective, the airlines have spent the past five years asking employees for givebacks (is that even a word?), with some regionals still focused on winning pay and benefit cuts. Mesaba Airlines is a prime example.
But there seems to be light at the end of tunnel now that a few carriers like American, United and US Airways made money last quarter. And what could be ugly about a profit?
Nothing really.
It’s the communications style airline management used to handle these recent successes that confirms just how badly they’ve again shot themselves in the foot.
Not surprisingly, turning a profit means everyone has their hand out looking for a share of the pie. And, not surprisingly, the airlines have rewarded executives with a few outstanding bonuses in an attempt – they say – to keep them from jumping ship to another more profitable career.
And what of the employees? They’re still working under the same giveback (maybe that is a real word) schemes. And worst of all, they didn’t even receive the courtesy of a note from management about executive bonuses before they read about it in the newspapers. Why are executive always surprised when employees react to these kinds of condescending tactics, especially from airlines that all employ internal communications people?
Here’s an idea for management.
Even though you know employees probably don’t have any other airline to jump to like management, how about pretending that you appreciate their efforts over the past few years too, by giving the executives a few million less and splitting the remainder among the rank and file … as a gesture.
Personally, I wouldn’t be expecting employees to lay low much longer at any airline that turns a profit, no matter what management and the shareholders want.
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Aviation and Communications still don’t seem to work in the same sentence
by
No Comments
The aviation industry has a history of some pretty repulsive communications efforts aimed at customers and employees, like charging an airline’s best clients the highest possible ticket prices when those customers needed them most … at the least minute.
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Blogging worries me
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If the key to writing about anything is to add to the body of knowledge in the world that attempts to persuade people to do or not do something, it would seem the critical element – other than laying down some insightful prose that is – would be to guarantee that customers have an opportunity to read those words. (more…)