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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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The Pilot Shortage Will Be Worse Than Anyone Believes
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The infectious excitement surrounding the U.S. Sport Aviation Expo in Sebring Florida last month made it pretty clear that the Light Sport Aircraft (LSA) movement offers a far different air show experience than Air Venture, or Sun & Fun or most other local events. In a nice way, I was impressed with the ease of browsing at the 20 or 30 new aircraft on display.
But the exhilaration of seeing a full range of LSA airplanes, ones an average pilot can actually afford to own and fly, was overshadowed by another revelation I took away from Sebring. More sobering was the realization that everywhere, I ran into pilots and enthusiasts who were not only past 50 like me, but many easily past 60, 70 and beyond.
While the graying of the pilot world will hardly come as a profound shock to anyone, AOPA’s Kathleen Vascouselos said on a recent AvWeb podcast that the total pilot population drop is worse than anyone has even imagined, from 850,000 in the early 1990s to 597,000 today.
Couple those numbers with preponderance of old men and women I see around airports and shows and lots of aircraft-marketing people are probably having nightmares … lots and lots of nightmares, because in 10 to 15 years, a huge chunk of the nation’s pilot population is going to simply drop off the face of the Earth, never to return.
And we’ve trained few replacements. (more…)
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The Technical Side of Blogging; May I have the Excedrin Please!
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People often wonder if I’m a pilot first or a journalist and for the life of me, I’m never quite sure. Answering “both” never seems to be quite enough for anyone though and yet at times each seems just as significant an influence in my life.
A potential client asked me last week whether I was technical enough to learn a new piece of software for a contract we bid on at CommAvia and I hesitated with my answer because until I started blogging, I thought I was fairly computer literate. I can fly a jet, I can program a Flight Management System when they change the arrival into LAX on me, I can send e-mail … of course I should be pretty decent with a computer.
Then I attended an excellent seminar on blogging in San Francisco last fall and got all wrapped up in this need to share my two cents with the world on all things related to aviation, communications and marketing. Of course, I realized by the end of the seminar that the only blog possibly good enough for me would be one with its own URL. Jetwhine.com was born a few weeks later.
The evolution of this blog has been far from painless however.
And as I’ve been reminded again over the past few days, anyone who wants a blog free of a WordPress or Blogspot name in the address had better be ready for more than a few irritating moments dealing with the computer software and hardware. (more…)
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Bad Aviation Marketing … Part 2
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Time for a quick follow up to yesterday’s post. Call this one “How to Make Customers Even More Angry the Second Time Around.”
I related some of my nightmarish e-mail marketing experiences with a company called Western Aviation and its well-organized spamming program. It took a few days of rants and raves from myself and dozens of others in the industry, but it seems pretty clear that Western grabs e-mails and fax numbers anyway they can and then refuses to let go.
Western’s president posted a message today that not only was not even remotely apolgetic about their irritating marketing campaigns, but went on to accuse e-mail recipients of being idiots because they didn’t seem to understand how to use Western’s easy opt-out procedure.
Everyone I know has tried unsuccessfully many times to be removed from Western’s lists. (more…)