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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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Newly Minted Pilot? Now What?
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Ed Note: My friend Marc Epner and I often discuss why people always seem so focused on how much it costs to win a private pilot certificate. Obviously, there is much more fun to be had after passing that first checkride. BTW, Marc orginally called this piece, “How Much is that Doggie in the Window?” I had to convince him that Google would spit us out with that kind of title. Rob Mark
How Much is That Doggie in the Window? – by Marc Epner
For those of you too young to remember the song that inspired the title of this article, it’s very much akin to the question many pilots hear when talking with non-flying people. “How much does it cost to get a pilot’s license?” I always chuckle when I hear that question. It makes me want to answer, “Why, are you going to stop flying after you earn your license?” Of course the better question is, “how much does it cost to fly?”
Whether talking about buying that doggie in the window, or the required investment to start a new hobby (e.g. flying, golf, etc), a cash outlay will be required. But the cost to get started is dwarfed by the ongoing cost. Unlike the business world, where corporations focus on total cost of ownership (TCO), we as individual consumers focus on initial costs only.
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Looking Up to Sustain a Future in Aviation
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Sunny and 42 degrees, the saturated blue sky is the first crack in the Wisconsin winter. Planted in the driveway like a human heliotrope I turned and opened my eyes in search of honking geese and squawking sandhill cranes, pathfinders for northbound flocks. A more mechanical buzz drew my eyes eastward to the effulgent Cessna working its way west.
More than anything I wanted to be aloft with the geese and cranes, basking in the sun that warmed the Cessna’s cockpit. But with a freelancer’s income and two kids in college, for the past half decade, and for how many ears to come, looking up is as close as I’ll get. But I’m not complaining.
The FAA counts active pilots by current medical certificates. Given the declining numbers, I’m not the only one who let mine lapse. For many of us, flying is something we do for fun, which means it comes after higher priorities, like a roof, food, and providing for the family. But that doesn’t mean I didn’t host a pity party for one on days such as this.
At least I did until I talked to Steve Wood, a pilot who divides his time between the UK and US, and who has set nearly 300 speed records over a closed course, 90 of them FAI-recognized world records. After hearing his story, I realized that what’s most important is that I still look up when a sound, especially a flying-machine-made sound, draws my eyes skyward.
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Bring Your Kid to Work, ATC Style
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When I saw the caller ID this morning with CNN’s address I figured something awful was up. Usually is.
“Can you talk about the Kennedy incident,” the producer asked me? Didn’t sound like she wanted me to talk about the impending runway closure. The young lady wanted my opinion on the kid controlling traffic at JFK last month (click the link below to listen). The father – a fully certified controller at JFK – and his supervisor were suspended for letting a young boy – the controller’s son – plug in to the tower radio with his dad and say “Cleared for takeoff,” and “Contact departure.”
Some callers on the CNN segment today were outraged that a controller would so thoughtlessly endanger the lives of so many people, while others thought a guy giving his son a taste for the job wasn’t a bad idea as long as dad was right there watching over things. And dad was doing just that. The kid never controlled anything. He said the words his dad told him to say, nothing more. And he sounded pretty good to tell you the truth which is why the pilots on frequency loved it.
No one at the upper echelons of the FAA or the controller’s union was laughing however and honestly, there was little else they could say. This looked bad for sure. In retrospect, this was surely a boneheaded thing to do, not because it WAS unsafe, but because it LOOKED unsafe to everyone. And PR is about the way things look, not the way things are.
First a few facts
The controllers at JFK are the Top Gun of their profession, as are the controllers at LaGuardia, Newark, Atlanta, O’Hare and dozens of other towers where controllers probably talk to well over a thousand planes every day. They are quite literally the best of the best. Anyone who’s flown an airplane into any of these cities will confirm that.