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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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A Finite Fraternity: Combat Fighter Ace
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Frederick Payne, America’s oldest surviving combat fighter ace, died August 6 at age 104. According to his obituary in The New York Times, the retired U.S. Marine Corps brigadier general earned this singular achievement at the controls of a Grumman F4F Wildcat in the skies over Guadalcanal in 1942.
What’s interesting to me is that the pilots who will likely be America’s last two combat fighter aces, Duke Cunningham and Steve Ritchie, joined this finite community a mere 30 years after Payne, when they each downed the requisite five enemy aircraft in 1972 in the skies over Vietnam. Flying the F-4 Phantom, their back-seaters, William Driscoll and Charles DeBellevue, share this combat achievement. American aviators have logged a lot of combat time in the ensuring 43 years, but conflict has changed, and most of their targets are on the ground—or on the screen.
It seems clear that the era of the combat fighter ace exists only in history, and that those who’ve earned this distinction are members of a finite fraternity.
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Aviation is Work … Usually
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I really don’t like traveling much any more. It’s usually way too much work on the airlines, efforts over which I usually have very little control other than complaining a bit on Twitter which doesn’t do much these days anyway. My business jet trips are fewer and farther between than the old days too.
Take my trip last week down to St. Maarten in the Caribbean for a media junket with 10 other writers, about evenly split between aviation and travel journalists. I swear the folks @americanair were trying to see just how cumbersome they could make the trip.
Despite American, I did know St. Maarten would be beautiful. And I knew I’d see a bunch of airplane geeks hanging around the fences at the approach end of SXM’s runway trying not to get blown over when KLM’s 747-400 poured the coals to it on takeoff. Sure the food would probably be scrumptious and yes, I knew I’d surely meet some memorable people from the islands.
But I also knew it was going to be work … the folks at Princess Juliana International airport wanted to show us SXM up close and personal, so we’d go back and tell others, many others what we experienced. I was ready, prepared even, because that’s my job these days, turning my eagle eye on some issue, some person or a place and synthesizing it all into some pithy text to be read by millions.
OK, OK so I’m not much of liar, except that the SXM folks really did want us to experience the region for a week.
And the trip to SXM was incredible, truly incredible. I’ve never seen such pristine waters or breathtaking views that close to sea level.
Certainly there are thanks in order, like the great ladies at SXM – Regina, Annmarie, Suzy and the others – for inviting me to experience the island and its role as a hub to its surrounding neighbors last week, but also a tip of the hat to the other writers who joined me on St. Maarten. While we more experienced writers may possess a wealth of industry knowledge, our younger colleagues also possess a solid grasp on new mthods to use technology for aviation story telling.
There was Seth from @runwaygirl and @wandrme, who always seemed to be managing three or four different video and still cameras.
Adam from @privatefly who insists his awesome Twin Otter video at St. Barths was only luck – A Close Up Arrival at St.Barths.
Leslie, alias @leslieyip0911, who turned the idea of delivering a Dominos pizza by plane into an awesome 1-minute branding spectacular in one day – Mashable Pizza Delivery Flight. Kristen from @BorderFreeProd, who shot more video about lush travel options and food than all of us put together I think, or @lizmoscrop who never appeared the entire week without her iPhone on a stick ready to shoot the next story. And these are only a few of the journalists I worked with.
I can’t forget the print folks … @kcreedy, @allplane, @airdestinations, @hazelking25 and @atastefortravel. I hope I didn’t miss anyone.
And of course the great companies that sponsored part of last week like WinAir – @flywinair – for transportation between the islands, especially Helena De Bekker and the way she jumped into all the extra work we piled on her, Earl Wyatt From Seagrapes and his business partner Sheldon Palm from TLC Aviation and the Sonesta Ocean Point Reesort. There was Michel Hodge from the Airport Board of Directors, Nils Dufau from St. Barths’ tourism office, Greg Hassell and his crew from the SXM control tower that gave us the full ATC tour and of course Cdr. Bud @cdrbud who was the idea man behind much of the week’s events. A bunch of local writers connected with us as well like Fabian Badejo and Darlene Hodge. And who could forget our most excellent photographer Alain Duzant. (more…)
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Aviation Safety: Courage and the Pragmatic Acceptance of Inalienable Power
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Like pilots everywhere, I never surrender an opportunity to go flying. And then there are days like today. Thunder rumbles closer, rain beats on the windows, and online radar reveals the crawling approach of a large green blob with an enlarged blood red heart. Yes, today is a good day to be on the ground, and nothing would persuade me to think—or act—otherwise.
An inalienable fact of aviation safety is that decisions based on anything other than a pragmatic assessment of the risks and consequences involved too often have terminal conclusions. And yet, as a community, we pilots too often address such situations with the optimism of those who invest in Powerball tickets.
Courage is another essential aspect of aviation safety because too often our piloting peers encourage a sanguine assessment of the risks and recount their adventures in beating the odds against them in similar situations. I’ve never seen peer pressure as a contributing cause in an NTSB accident report, but from experience and observation it is certainly a factor.