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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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Veterans: Be Cautious About Non-Accredited College Programs
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As a Vietnam-Era veteran myself and someone who used the G.I. Bill to cover the cost of some of my early flight training, I was more than a little interested when June Olsen approached me about writing a story about today’s G.I. Bill (Actually, I’m always interested in aviation-focused guest post from good writers).
June recently graduated with a degree in educational psychology and works as a writer on all things education from her home in Bellevue Washington. She’s always interested in connecting with bloggers online too. You’ll find her at [email protected]. And now, on to June’s story about what vets need to know about the new G.I. Bill.
Rob Mark
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When veterans return home after their service, it is natural that they would want to begin the next chapter in their life by getting the education and training necessary to join the workforce. After all, having a solid career is a great way to support a family and find personal fulfillment.
Many therefore avail themselves of the G.I. Bill, which provides tuition assistance to returning veterans. Veterans rightly see the G.I. Bill as a way to receive the training they need to have a successful career. However, the GI Bill does not always cover all tuition in all situations, and as a result some veterans search for the least expensive college program available. While this may seem like a good idea, particularly in light of the skyrocketing cost of higher education, it pays to conduct diligent research comparing traditional and accredited colleges online.
Some veterans choose to enroll in a non-accredited program. While this might seem like a minor issue, it is in fact very important. Many employers and certification bodies don’t consider degrees obtained at non-accredited institutions valid. In practical terms, this means that, for example, if a veteran received a nursing degree from a non-accredited nursing program, many hospitals or statewide nursing certification boards would not recognize the degree. This could be a significant problem: after several years of training, the veteran would find him or herself with a degree that is essentially useless in advancing his or her career goals.
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Challenge Notes Importance of Flight Time
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For decades, individuals and organizations have focused attention and effort on rebuilding the pilot population. But for the first time in memory, AOPA is drawing attention to—and doing something about it with its Keep ’em Flying Challenge—an equally important number: hours flown. And it asks pilots to push themselves beyond the hundred-buck burger run.
Like the pilot population, the hours flown by GA and Part 135 pilots has been in bumpy decline since 1980, when they logged more than 41 million hours. In 1990 it was 32 million; in 2000 it was 29.9 million; and in 2010 is was 24.8 million hours, up from 23.7 the year before.
AOPA elegantly shares the wealth and benefits of getting airborne and motivates participation with a random drawing that will award a $2,499 grand prize, $1,000 to second place, $500 to third place, and four $250 fourth-place awards.
There’s one entry per pilot, and qualification is on the honor system. Between April 1 and July 31, 2012, pilots must fly at least five hours as pilot in command of an aircraft to five destination airports more than 50 nautical miles away, and complete an Air Safety Institute online course.
That sounds like more fun than the prosaic burger mission to the same old airports. Aviation is about adventure, so add your own challenge. Fly to five never-before visited airports or seek all available runway options: grass, gravel, asphalt, and concrete, short and soft, wide and narrow.
And don’t forget to invite your friends. Making your challenge a social event with passengers (prospective or lapsed pilots you may know) and more than one airplane adds to the fun! Let me know what personal challenge you come up with, because flying is also about sharing. — Scott Spangler
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Flying Cars, the Fun Factor, and Their Future
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The PAL-V, a hot-rod trike with a fold away gyrocopter rotor and prop.The Terrafugia Transition’s appearance at the New York auto show made the news recently. Flying cars have been an interesting engineering exercise since the late 1940s, but they really aren’t practical. Just ask Popular Mechanics: 7 Reasons the Terrafugia Transition Isn’t Coming to Your Garage.
This is the point that hit home with me. The author compared the Terrafugia to the Cessna 152; would you spend $279,000 on a dual-purpose 152? And that assumes the manufacturer successfully certifies it as a light-sport aircraft, and that they can hold this price. For half the price of a flying car you can buy a Cessna 162 SkyCatcher, which leaves more than enough for a really nice car—and gas money for both.
Much more interesting is the PAL-V (Personal Air and Land Vehicle),which recently made its maiden flight in the Netherlands, captured in the video above. Engineers bred a two-seat, three-wheel motorcycle with a gyrocopter and designed a fascinating low-profile, fold-away rotor, prop, and tail. On the ground and in the air, this thing looks like fun.