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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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User-Fee ATC: Speak Up Now or Lose Access
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Call it what you like, privatizing, corporatizing, or commercializing the FAA air traffic control system will ruin the foundation of the world’s largest, safest, and most diverse and complex national airspace system. Oh, and unless we stand up and speak up to our elected officials, it will probably mark the end of general aviation as we know it. And not for the reason you think.
Our politicians and the special interests behind them propose this ATC takeover at least once a decade. Common to all of them is replacing the efficient and equitable fuel-and-ticket-tax funding of the system with user fees. Money always gets a pilot’s attention, but that’s not what this is about.
What matters most to the special interests behind these efforts is control of who has access to the airspace and airports. Regardless of the primary target, such as the growing number of low-cost carriers targeted in the 1990’s user-fee ATC attempt, GA always comes second to the airlines’ needs, and in every scheme, airline people are the majority on the board of directors that would run user-fee ATC.
The GA community successfully opposed the user-fee ATC schemes proposed in the 1990s and in 2006-8, but the threat this year is more ominous for several reasons.
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Trying Something New
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Trying Something New
Quite a few Jetwhine readers and listeners have asked what happened to The Aviation Minute, the editorial podcast series I began a couple of years ago using this neat logo.
The simple answer is we’ve evolved a bit … from the early audio-based shows to a video-centered stories.
Thanks to a new partnership between Jetwhine and Aviationpros.com, publishers of Airport Business, AMT and Ground Service and Support – we’ve also changed the name from The Aviation Minute to On the Mark adding this new logo along the way. The shows will air twice a month on both the AviationPros.com site and here at Jetwhine, but will also be delivered directly to viewers via an e-mail blast system.
So here’s On the Mark, Networking Tips From NBAA 2015 (click to view).
As always, I’m interested in what you think of the content, as well as the production. I’m always on the lookout for some under-appreciated topic thats cries out for a little coverage, so pass along your ideas to us at rob@jetwhine.com. Thanks for watching.
Rob Mark, Publisher
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Taking Time to Find Aviation Serendipity
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On your way someplace else, how many times have you passed a sign pointing to a small town airport? The more important question is how many times have you followed that sign?
With the potential for unknown delays between the sign and your intended destination, and the unlikely reward of aviation serendipity, of finding something interesting at a small airport in these aviation depressed times, you probably drive on by. Yeah, me, too.
But not this year, or in all the years to follow. Finding something special is worth the minutes it takes to follow the airport sign and make a drive-by inspection. If there is nothing that captures my curiosity, I’ll be on my way. But if it is taken prisoner, what else can I do but surrender to it?
A visit to the municipal airport, with a single 4,400-foot runway, that serves the 11,639 residents of Urbana, Ohio, planted the seed for this change. Had I been traveling and not touring the National Aviation Heritage Area, I would have missed something truly unique, the Champaign Aviation Museum, which calls this small town airport, also known as Grimes Field, home.