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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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Why is Regional Airline Pay So Bad?
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RSS FeedWhy is Regional Airline Pay So Bad?
Dear Reader / Listeners – You now have the option to listen to The Aviation Minute podcast or just read the text of the show below. If you receive Jetwhine via e-mail, you can click here to listen as well.
I was thinking the other day about my early days as a working flight instructor. I remember hanging out with a bunch of other instructors at Palwaukee airport grousing about how we’d live on the 5 bucks an hour we could get paid for sitting in the right seat of a Cessna 150. Then one day we heard about this guy on the airport who was willing to instruct for free … zero, zip, nada … just because he loved flying so much. He had another job so he didn’t really care about the money. I can tell you … the rest of us instructors didn’t much like this idea of a competitor undercutting our prices.
There was a lesson about pilot wages that I took from this experience after one of the other guys told me not to worry about that instructor. “Hey,” he told me. “The guy may get a few students, but don’t you think they’ll be paying him what both his students AND that instructor believe he’s worth?”
Hmmmm. I never forgot that.
So on to today’s topic … the lousy pay at the regional airlines. Why does it continue, many people wonder?
First a bit of context. Most of the regional airlines provide service to more than one major airline. Because there are only a few regional feeders to deliver service to the few majors we have left in this country, the business has become pretty cut-throat. That means those regionals will do most anything to keep costs low and that means … you guessed … keep wages low.
So let’s compare Envoy, the old American Eagle carrier, with the mainline pilots at American Airlines just to see how different the groups are.
You may have heard recently the American mainline pilots — represented by the Allied Pilots Association — just signed a new contract, one that gives them an immediate 23% pay hike and 3% annual raises after that. Not bad, but then American Airlines pulled down some serious profits the past few years including a windfall off the drop in fuel prices. (more…)
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Is GA Included in NASA’s Low-Altitude Drone Traffic Management Program?
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Late last year, NASA launched it Unmanned Aerial System (UAS) Traffic Management (UTM) program to devise and test an automated system that would keep drones from bumping into each other as they performed a variety of missions. What concerns me is that nowhere in the online presentation, or in a Google search of news about the UTM program, did NASA mention anything about the users who’ve been occupying this low-altitude airspace for more than a century—aircraft occupied by humans.
Building on the lessons learned over the life of the air traffic management (ATM) of occupied aircraft, NASA’s solution “would enable safe and efficient low-altitude airspace operations by providing services such as airspace design, corridors, dynamic geo-fencing, severe weather and wind avoidance, congestion management, terrain avoidance, route planning and re-routing, separation management, sequencing and spacing, and contingency management.”
Noting that “UTM is essential to enable the accelerated development of civilian UAS applications,” by 2019 NASA hopes to develop and demonstrate an automated system that also provides data to its human managers. NASA’S website compared the result to the roads, signs and signals, and rules that guide safety vehicles that operate in two dimensions. Think that through for a moment, and consider what it might mean for general aviators.
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First-Person View: The Future of Flight
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Simply put, first-person view (FPV) is a smart phone perspective of flight. It gives the person in command of a remotely piloted aircraft a real-time look at where it is going. And it is the future of flying because it provides what people want—a view of their world from a different perspective—efficiently and economically.
Looking at the world from on high is why many of us became pilots. Until technology made drones and their FPV are possible, investing the time and effort and money to be physically present in the aircraft was our only option. No more.
There’s no denying that FPV delivers only one aspect of flight’s sensory appeal. It needs its kinesthetic, aural, and olfactory contributions to be complete, and for those who will settle for nothing less than the complete experience flight, becoming a first-person pilot will always be available to those who can’t live without it.
But one day in the not too distant future, they will not comprise the majority of the pilot population. Technology has changed how we all experience the world. If you doubt this, look around. Note how many people you see filter their lives through the screens of their smart phones.