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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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John Carr’s Gone Fishin’
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Anyone who follows the happenings of the FAA and air traffic control knows John Carr. He spent more than a couple of years at the helm of NATCA, the controller’s union, and was Pat Forrey’s predecessor. I had the pleasure of interviewing John just about a year ago today in fact here at Jetwhine.
Until last week, John wrote the blog The Main Bang.
His weblog was most often a peek inside the lunacy that is the FAA that, unfortunately, runs most of our lives to some degree or another. If a blog was supposed to be passionate to be good, then John’s was excellent. You could just tell that he wasn’t writing to make money or win friends – hardly, some might say – but rather to make readers feel what he felt. This he did, with thunderbolts of insight about what’s wrong with the air traffic control system today.
If you missed reading The Main Bang, you’ll need to be patient before you see it again, because last week John shut the blog down tighter than Fort Knox.
He decided it was time for a break, so John pushed away his keyboard and hung up his Gone Fishin sign. As the author of an occasionally passionate piece of social media myself, I can well understand how much this kind of thing takes out of editors and writers so John’s break is well deserved.
Will the Main Bang return again? While some hope it never again sees the light of day, I can only say I hope his name pops up again. But only John knows for sure. You may not have agreed with him at times, but boy John sure knew how to get people talking about air traffic control.
Until then, catch a big one buddy. And stop by the other aviation blogs occasionally and tell us what you and family are up to in the wilds of Florida. We’ll miss you and your barbed civil servant tongue.
Rob Mark, editor
Technorati tags: NATCA, air traffic control, John Carr, FAA Public Affairs, ATC, business aviation, unions, airlines, The Main Bang, Pat Forrey, air travel, Bobby Sturgell -
More AirVenture Blogging Buzz
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And just when you think almost no one notices anything you write comes a great article like this one from FlightGlobal’s Runway Girl, Mary Kirby.
She interviewed me a few days ago when she realized she wouldn’t be able to make it to Oshkosh for the show.
As Mary said, Social Media is about starting conversations at all levels.
We’re planning on making a dent in this new landscape on July 28th so do join us. And for those of you hanging around on Friday at AirVenture, there’s also the Podapalooza at the AirBP Pavilion starting at 5:30 pm.
Technorati tags: AirVenture 2008, FlightGlobal, Runway Girl, Mary Kirby, Blog Fest, Social Media, flight training magazine, general aviation, business aviation, airlines, air travel -
AirVenture Blogger Fest Next Week
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It doesn’t seem possible that it’s been nearly a year in the making, but it has. When I suggested a get together for aviation bloggers last fall I never thought I’d see much interest. But was I wrong. By Thanksgiving I’d had messages from nearly two dozen other bloggers that thought it was a great idea.
And now the first AirVenture Blogger Fest is just a week away.
If you’re in Oshkosh for the show, join us on Monday July 28 at 4 PM at the GAMA building. For those of you who Twitter, I’ll be there too on my “Jetwhine” ID unless I can figure out how to make my iPhone run with the “AirVenture” ID I also reserved.
While our Fest will be a meet and greet opportunity for anyone who blogs about aviation – or wants to – this will also be the chance for people who simply want to know more about how this industry and Web 2.0 fit together. We may even have a few cool aviation social media announcements you won’t want to miss.
So come early, stay late.
We’ll have lots of bottled water on ice to take away the burn of that hot Oshkosh summer heat.
Technorati tags: AirVenture 2008, Oshkosh Wisconsin, blogging, air travel, business aviation, Twitter, Web 2.0, social media, jetwhine.com, general aviation