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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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Air Traffic Control: Nice and Easy or Nice and Rough?
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As Tina Turner said when she and Ike produced their own version of the Credence Clearwater Revival classic, Proud Mary, “We never do nothing nice and easy. We always do it nice … and rough.”
So here’s your chance to take a look at two videos that will teach you a bit more about the nation’s air traffic controllers and their contentious interactions with their bosses at FAA.
The first version comes from the National Air Traffic Controllers Association (NATCA) and offers the air traveler a pretty straight forward view of what might well happen as the number of experienced air traffic controllers continues its downward spiral.
The other version came to us through the ATC News site and offers a Big Brother version of life inside of the agency from a controller’s perspective. Having spent 10 years of my life with the agency, I’d say the NATCA folks are being pretty nice at this point in their dance with the FAA.
This post comes with a warning. Those of you employed by the agency are not going to like the second version one bit I fear.
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Southwest is More Than Just a Money Maker
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Evan Spark’s ran an interesting post the other day about Southwest Airlines and Herb Kelleher, the company’s chairman. Take a look if only to watch this great video of Herb starring in a Southwest commercial 30 years ago. It’s clear why he spent so much of his career as their point man. He’s always been good in front of crowd. But so are most of the people that work at Southwest from what I’ve experienced and that element is a major competitive advantage for the airline.
Evan’s post also offers an important contrast that looks deeper into where people fit at Southwest versus its competitors. Sparks began by posting a link to Southwest’s mission statement.
Allow me to quote Southwest president Colleen Barrett… “our goal of serving you [the customer] with a sense of warmth, friendliness, individual pride, and company spirit is not just what comes naturally to our Employees. It’s also the pledge we’re committed to honoring each and every day.”
Barrett apparently well recalls the message Herb has promoted for 30 years as well as she says, “Our Customer Service package is totally dependent upon [our] Employees. Without Employees—and without the right Employees—we would have at best poor Customer Service, and poor service means no more Customers.” At Southwest, the company priorities are simple, Employees, Customers, then Shareholders, completely upside down from the legacy airlines.
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General Aviation Won’t Find Future Pilots in Rear View Mirror
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Pilots are a population in decline. We are getting old and resting our wings, and it saddens me no end to watch the industry trawl yesterday’s fishing grounds for tomorrow’s pilots, most of whom have moved on to places unknown.
It’s almost as though general aviation is motoring toward the future with its eyes firmly focused on the rear view mirror. As good as it was, the 20th century is over, and it’s never coming back. Information rules in the 21st century, and what the GA does not know about its potential customers has always been its undoing.
In times past and present pilots don’t really exist until they have a student pilot certificate. This gets them into the FAA system, the only industry-wide source of population numbers. But here’s the rub: students don’t need a certificate until they solo. Until they acquire that piece of paper they’ve been invisible customers for six days, six months, or six years.
In the 21st century, making the count with a medical certificate is pretty much worthless information. Yes, it counts “active” pilots, but it misses those who don’t need medicals, sport pilots and those who fly balloons and gliders. Right now all GA knows is that the FAA issued these pilots a certificate, and that’s it. (more…)