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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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FAA: Customer Service Means Saying You’re Sorry
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FAA held a customer service seminar last week in Chicago. I always chuckle a bit when someone combines the FAA acronym with anything that even sounds like customer service. Sorry PT & DB. But then, today’s my birthday so I suppose most readers will indulge me a bit of curmudgeonly prose (and no, I won’t tell you how old I am other than explaining it’s a zero year).
Honestly, with only a few rare exceptions, I have found FAA folks to be good at what they do, both controllers and inspectors. However – you knew this was coming – I doubt I’d ever make the leap to call the services FAA provides as “good customer service.” They are simply two entirely different concepts, one involving the worker bees, the other involving management.
To me, one of the dumbest decisions the agency ever made was contracting out small towers to private corporations. I know the agency supposedly saved money in the process, but the customer service aspect for users was lost in the translation.
Case in point
I was flying a Citation back to of one of my favorite airports in Chicago, Waukegan (UGN) a few years back on a Part 135 charter trip. Waukegan Tower is privately-run contract tower, although it is federally controlled, whatever that means to folks in airplanes. Midwest ATC runs UGN tower to be precise, the same folks helping the U.S. government rebuild ATC in some Middle East countries. Midwest also ran the now closed Chicago Meigs Field contract tower until Mayor Daley shut the place down a few years back.
My Citation trip took place about a year after WGN-Radio personality Bob Collins was killed in a midair collision while inbound to Waukegan. He was talking to Waukegan controllers at the time of the crash, as was I. Having spent many years on the other side of the microphone, I try my best to form a picture of the airspace in my mind when I fly to make sure I don’t end up like Mr. Collins.
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Share Thumbs-Up Moments With Everyone
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If you haven’t heard, the Internet and blogs like JetWhine are killing print journalism. Slowly, community journalists, everyday people with an interest in their community, are becoming our primary source of news. If you doubt this, watch TV news and count how many times the talking heads attribute part of their stories–or the subjects themselves–to an online source.
Like it or not, whether we get it in print, on TV, or online, news shapes our views of the world. As members of the online aviation community, why not use this to our benefit? Let’s recognize all positive pilot performance, not just that which catches national attention, like US Airways Flight 1549. At almost every airport is a Captain Sully, doing what’s best for aviation.
All too often, when someone picks on something dear to us the first reaction is to get defensive, to engage in a useless he-said, she-said, “oh, yeah, well what about” war of words that changes no one’s minds. Rather than blathering in blogs about what’s wrong with aviation, let us praise what’s right. The beleaguered and often battered business aviation community provides a perfect example.
We in aviation readily understand aviation’s contribution to business, the old time is money argument. In better times, people might understand. But today they are not in the mood to listen because they don’t care a whit about the over paid executives and middle managers who led us into our current situation. Let’s face it, aviation’s association with these executives is what ignited the current anti-aviation firestorm.
Instead of spewing defensive rhetoric, let’s show the congregation of everyday Americans the benefits general aviation brings to daily life. Business aviation can’t be all bad when a local business transports a cancer patient as a member of the Corporate Angel Network or participates in the Citation Special Olympics Airlift. If the community holds a fundraiser for this person, aviation should be a visible participant.
Everyday pilots do scores of unrecognized good deeds, but for whatever reason, they never seems to crawl over the airport fence. Is it any wonder aviation is seen as an elite aerial misanthrope? (more…)
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Wired Airspace: It’s all About NYC & Airlines
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Maybe I haven’t had enough coffee this morning, but I’m not sure how to take an article in the current issue of Wired, “Air Repair: Key to Eliminating U.S. Flight Delays? Redesign the Sky Over New York City.” It reminds me of that 1976 cover of the New Yorker magazine, where the land west of the Hudson River really didn’t matter. There’s no denying that the city is an important place; it spawned the economic virus that now affects us all. But the cause of–and key to eliminating–U.S. airline delays?
The article’s opening graphic (left, with other below) clearly shows that NYC is busy. More than 2 million flights passing through its airspace each year, and many of the flight tracks connect to one of the three metro-area airports: Kennedy, Newark, and LaGuardia. What’s interesting is that the article focuses on departures, as if these millions of flight are born immaculately in NYC. It mentions arrivals twice, and without any specifics. (Hmm, if NYC is so important, why the emphasis on getting out of town?)
Right now you’re probably wondering about the other busy hubs like Atlanta, O’Hare, and LAX. Doesn’t traffic and weather at any of them affect delays? The article never says. It does mention NextGEN, and rightly says that its time savings are a ways off because it requires some serious cash for avionics.
In the meantime, to reduce airline delays nationwide, the FAA hired Mitre, an R&D firm that works exclusively for the government, to redesign NYC’s traffic flow. A pull quote describes it succinctly: “The redesign creates a kind of airborne suburbia, paving the skies far out into what used to be the countryside.” The text provides more chilling details: “Mitre’s proposal is to extend the boundaries of this airborne city into a 31,180-square-mile area that stretches from Philadelphia to Albany to Montauk.”