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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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The Aviation Minute: Episode 3 – The TSA & Guns
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RSS FeedI know the TSA costs us billions every year, but for once, I think people need to appreciate them for the good things those folks do … especially in light of the possibilities that hijackers may have taken out Malaysian 370 last week.
Rob Mark, Publisher
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LeTourneau Aviators Promote Female Flyers
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Le Tourneau University introduces 6th grade girls to aviation opportunities.In case you missed it, last week was Women in Aviation Worldwide Week, and this past weekend Women in Aviation International held its 25th annual International Women in Aviation Conference at Disney’s Coronado Spring Resort in Orlando, Florida. Both activities share the common goal of increasing the number of female flyers, and this includes getting more females involved in all aspects of aviation.
These international events inspire others to get involved in the effort at a local level where individual women in aviation inspire the next generation face-to-face in hands-on activities. The best example I’ve seen so far occurred at the LeTourneau University’s School of Aeronautical Science, where CFI Lee Foster introduced 6th grade girls to the thrill of flight.
The school’s blog provided the details of the day in Incredible Women in Aviation, but the priceless message of the experience comes about halfway through the video. The student’s wide-eye surprise when the Cessna 172R lifted off the runway conveyed more than words could express. If there is anything that can get people interested in aviation, and keep them interested, it is seeking out and pursuing exciting revelations that make a person’s eyes grow wide.
This experience is surely different for everyone, so why not start by sharing the aspect of aviation that still makes your eyes reveal your enjoyment of it. — Scott Spangler, Editor
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The Aviation Minute: Episode 2 – Regional Airline Safety
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RSS FeedThanks to all of you for the great comments about The Aviation Minute‘s first episode. You’ll find episode 2 below, which actually evolved from comments related to the first show about the regional airline pilot shortage.
Show Updates: If you look in the right-hand column here on the Jetwhine home page, you’ll see that we’ve added an easy way for you to subscribe to just The Aviation Minute episodes if you choose. We’re still waiting for the Apple people to work their magic on our iTunes feed which should be up and running by episode 3. In the next week, we’ll also have our show archive operational for a quick episode re-listen.
Future Show Ideas: Thanks to the new listeners who took the time to share topic ideas that need some serious media attention. We can never have too many, so if there’s an industry on your mind … be it air traffic control, business aviation, safety, learning to fly or anything else, tell me about them at rob@jetwhine.com.
Finally, a show like this really depends upon listeners like you to tell their friends. If you like The Aviation Minute, send your friends back here to Jetwhine.com and ask them to click on The Aviation Minute icon or just fill in their e-mail address.
Thanks for listening. Rob Mark, Publisher