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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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Southwest Airlines: In a Category of Its Own
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I had a ringside seat last week to many of the inner workings at Southwest Airlines when I was invited – along with a bunch of other journalists – to the airline’s media day. No matter how many times I interact with Southwest employees, they continue to amaze me.
And apparently they amaze quite a few other folks too because Southwest’s Nuts About Southwest blog won Best Corporate Blog of the Year from PR News this week.
I cut my flying teeth at a more traditional airline and in a number of corporate flight departments. As a chronicler of the aviation industry these days, I, like the rest of the media actually, see myself as one of those eternal critics of the world.
Honestly I have for years been wondering how the people at Southwest Airlines could possibly keep this different kind of airline running year after year and make money each year as well. And this airline is different in many ways, from their focus on low-costs to their never ending need to find that happy balance between costs and delivering a service that keeps passengers coming back.
A panel discussion at the Media Day luncheon provided a few insights when a number of travel industry experts gave us a little crystal ball gazing before they took questions. My friend Evan Sparks covered much of the detail of that panel at his blog the other day. What really grabbed me though was when one of the panelists explained the few existing airline categories. “There are only three,” he said. “Legacy airlines, low-cost and Southwest.”
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Remember When ALL the Pilots Were Men?
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A buddy of mine – Mal Gormley – sent this over today and I just had to pass it on. Here’s a shot of the largest aircraft in the USAF fleet, the C-5 Galaxy. And don’t ask if it’s an “A” or a “B” model because I have no idea.
Now take a look at the crew (below) of this airplane on it’s way to Afghanistan. Or perhaps it was on the way back from the Middle East, I’m not sure.
Being the utterly shallow individual that I am, I can tell you that when I rode around in the back of an Air Force airplane, my only option was a whether or not the pilot was a cranky old Major or a Colonel. And he probably had a cigar in his mouth.
Yup. Change is good!
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In Defense of the Contract Pilot
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Do you know this guy?
He’s Jeff Beck, a contract pilot of some renown. Contract pilots essentially lead a vagabond life from airplane to airplane until they’re no longer needed with no single place to really call home. They wait only for the phone to ring about their next job. In the pilot business, we could also call them aviation’s first line of entrepreneurs.
I’ve known Jeff for at least a decade although I knew of him for much longer than that. He’s an experienced international business aviation pilot with a pocketful of type ratings on almost every jet Gulfstream has ever produced.
Jeff Beck is also known for saying what needs saying, a trait where people in our industry often come up a little short.
What that means in English is that Jeff’s style of communicating what’s on his mind often slips underneath the skin of some younger and more sensitive readers … actually, some older ones too. He’ll no doubt make a perfect blogger when he decides to set his mind to it.
In the mean time, I’d like to offer up a bit of something else Jeff’s known for, his sense of humor which is something else we’re all a little short on these days. As one veteran to another, I introduce you to Jeff beck.