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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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Alphabets Collaborate for Aviation’s Future
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Less than a decade ago, when the symptom’s of aviation’s decline were firmly manifested, a number of aviation’s alphabet organizations focused mostly on increasing their slice of a shrinking pie. With the number of active pilots and new pilots shrinking faster than Greenland’s glaciers, it seems that they have finally decided to put their individual interests in line and address the problems as a cooperative, unified front.
That’s a good start, because the the problems, from the pilot population to airspace challenges to user fees and other restrictive elements, are too many for one organization to battle on their own. During EAA AirVenture 2012, the heads of (in alphabetical order) Aircraft Owners and Pilots Association (AOPA), Experimental Aircraft Association (EAA), General Aviation Manufacturers Association (GAMA), Helicopter Association International (HAI), National Association of State Aviation Officials (NASAO), and National Business Aviation Association (NBAA) gathered on stage to discuss cooperative efforts.
EAA is clearly an active instigator in this effort, a point made clear at its AirVenture Learn to Fly Discovery Center. EAA and the National Association of Flight Instructors (NAFI) have some history, as does the Society of Aviation and Flight Educators (SAFE) and NAFI. Yet here are all three working together to present a pilot proficiency program every day during AirVenture.
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Sequestration: Don’t Let the Trolls Win
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Until the other day, I thought a troll was one of those horrid little creatures living under bridges just waiting for the chance to reach up and scare the dickens out of some little kid. But lo and behold, as a reader told me, a troll in the Internet age is someone who grabs hold of a blog or website conversation and steers it to suit their motivation, sometimes a specific end result in mind, other times just to make sure either side in the story gets too cozy lest the troll’s influence diminishes.
Now that I know about these little demons think I’m starting to see them everywhere.
We had an interesting discussion about the European Emissions Scheme on the Airplane Geeks Show a few weeks back. The plan demands any aircraft – airliner or business jet – entering EU airspace take part in that region’s effort to reduce aviation’s carbon footprint … a save the planet effort that’s pretty tough to refute on the surface, whether you believe humans created the problem or not. That was the point of the AG discussion actually at least, not the good or bad of the tax (which doesn’t make much sense), but a good old “Save the Planet” chat.
After the show, we received a couple of ugly listener letters who were really upset by the discussion. One letter in particular about the emissions discussion did rattle me. “I found the Airplane Geeks discussion to be persistently biased and surprisingly unflattering to the role the USA plays in the world. Your (he meant me here) discussions and views in this episode made you look like the champions of rainbows and unicorns while presenting Americans as a bunch of intestinal parasites only interested in profiteering and plundering the globe.”
I said saving the planet was a good idea and I thought the EU had trumped the U.S. in starting a debate no one on either side of the Atlantic seemed to be having … and still isn’t for the most part. Everyone’s gotten focused on the tax. We were talking about clean air. How the chat evolved into “profiteering parasites” escaped me.
Then there was an Air France 447 discussion on LinkedIn. I made a comment about the oddity of some of that captain’s behavior in the last few minutes of the flight and was quickly whacked by a couple of folks with “real credentials,” or so they said, one of them a NY Times contributor. I didn’t have another opinion, I had a stupid opinion there. Then there was a discussion about media that someone hijacked on our alumni listserv. And remember when the Big Three dumped their business airplanes a few years ago after someone outed them in public about actually using the airplanes for business? Same thing … people trying to steer the discussion in a direction they wanted, not really concerned about the discussion itself. I didn’t simply have a different opinion in all these places … I had the wrong one.
You know what happens when some man or woman gets jumped on in one of these forums … they defend themselves for a bit but finally just say, “screw it,” and leaves. And who’d blame them?
And the trolls who often represent some minority opinion win by default.
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Finally, a New Take on Flight Schools
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Discussing the dismal number of student starts in the 1990s, my Flight Training magazine coworkers and I wondered how flight schools located where the nonflying public congregate, like shopping malls, might fare. Learning about two new aviation education efforts at EAA AirVenture 2012, we’re about to find out.
Zulu Flight Training, a subsidiary of Continental Motors, just opened in a mall in Spanish Fort, Alabama, not far from Mobile. Its partner in the program is Redbird Flight Simulations, which provides the latest in advanced, full-motion simulators. Whether pursuing their private pilot certificate or instrument or multiengine ratings, students will be introduced to—and practice—all key flight skills in the sim before getting into an airplane.
With ground and simulator school conveniently located, students are more likely to show up for lessons. “Our goal is to provide a consistent, structured and stress free environment at a set price to help people obtain their pilot’s license whether it is for a career or pleasure,” said Zulu Chairman Rhett Ross. That includes full disclosure of all course offerings and services to ensure that the curriculum or price never surprises students.
Zulu also offers proficiency training, and other pilot courses will be announced in the coming months, Ross said. As the pilot location proves itself and resolves inevitable kinks, Zulu will expand to other locations around the country. To help celebrate the 75th anniversary of the Piper Cub, Redbird simulated it with motion. It’s been awhile since I flew a Cub, but its response was spooky accurate. All it really needed to complete the simulation was a fan-blown slipstream through an open door.