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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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United Airlines: Time to Stop Just Talking About Customers
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RSS FeedOver the last 20 years, we all listened to one United CEO after another talk about how much they value their customers.
Enough talk.
United’s new CEO Oscar Munoz needs to stop the talking and start showing customers if the carrier ever really wants to again be great. Give a listen and tell me what you think.
Rob Mark, publisher
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Labor of Love: Capturing Veteran Leather
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When John Slemp came to the JetWhine.com lunch at EAA AirVenture 2015, he carried with him a large flat package that was maybe 20 by 24 inches by an inch deep and wrapped in brown paper. At such gatherings, most people just show up with their appetites, and as we later learned, John did, too, and it was wrapped in brown paper.
John is a commercial photographer with more than two decades of experience who, since 2001, has specialized in aviation. But his commercial work pays for his labor of love, photographing the decorated veteran leather flight jackets from conflicts past. And when they are still with us, and able to sit for his camera, the veterans who wore the iconic U.S. Army Air Force A-2 and U.S. Navy G-2 flight jackets. In the brown paper were several mounted prints of these spectacular images.
So far he’s photographed 31 pieces of veteran leather, and when he reaches his goal of 50, he plans to publish a book that will really be about, he said, the veterans who wore the jackets pictured. The Smithsonian National Air & Space Museum, the National Naval Aviation Museum, and others have opened their closets to the project that began at a meeting of EAA Chapter 690 in Lawrenceville, Georgia, with the jacket pictured above. (You can see more at John’s website, Aerographs Aviation Photography website.)
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AirVenture Volunteers: One Lady’s Story
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AirVenture Volunteers: One Lady’s Story
Publisher Note: One of the best parts about Jetwhine is that Scott and I often receive stories from readers out of the blue. While we can’t use them all, there are some that simply jump to the top of the pile as soon as we finish reading them.
This story, sent in last July by Marah Carney from Emporia KS, really caught my eye because it reminded me so much of the days when I too volunteered on the EAA flight line. Perhaps because I was celebrating an anniversary this year of my first volunteer days with orange paddles directing airplanes, or maybe it was just the sense of fun and energy about flying that I picked up on in Marah’s story. Really doesn’t matter I guess. The point is that there are still quite a few young people with a keen interest in aviation, keen enough to stand around in the hot Wisconsin sun as they help the airplanes park at AirVenture.
And yes, I did manage to meet Marah and her dad Bob at this year’s AirVenture, but it didn’t take much cajoling to get them to don those snappy Jetwhine buttons.
Let me introduce you to Marah Carney, a student pilot and a Senior Member Captain in the Civil Air Patrol.
Rob
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Marshaling My Father
Ever since I was an AirVenture newcomer, I wanted to volunteer at the largest air show in the world. Nine years later in 2010, I finally had the opportunity. In the past, I would attend Oshkosh with my family. I have experienced the AirVenture culture by staying at Sleepy Hollow campground, boarding in a dorm room at University of Wisconsin Oshkosh, and from underneath the wing of our family’s aircraft on the North Forty. Then in 2010 I got to experience Oshkosh with the Civil Air Patrol at National Blue Beret. I worked hard to get slotted for National Blue Beret—many hours of training have finally paid off.
This year, I had the unique opportunity to marshal my father and grandfather into general aircraft camping (GAC). They took off in a Cessna 172 from small town Kansas headed for Oshkosh, Wisconsin. Our CAP’s Juliet Flight was tasked, Thursday morning, for Flight Line North. After a night’s stay in Portage, Wisconsin, my father and grandfather landed on runway 27 shortly after 0800. They pulled off onto the paved taxiway and began their trek to GAC.
As a flight commander, my duty was to walk the flight line to check on the flight members and assist where needed. Because of a great distance between two marshalers, I was helping direct the ground traffic. Many Cessnas had landed about the same time, and all were in search of a camping spot. With the sun behind this particular Cessna, I could not tell the color or the tail number until it was almost past me. However, according a fellow fight member, I looked like a kid waving at my family after recognizing the tail number. Many hours of training had finally paid off.
It was a great privilege to marshal my father – then a fellow CAP member – and my hero at AirVenture 2010.
Marah Carney