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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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Are Anonymous Blog Posts Illegal?
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Posting anonymous comments to a blog could be on its way out of the social media spectrum if some recent legal action is found to have any teeth.
Aviation International News reported last night that aircraft builder Eclipse Aviation had subpoenaed Google in an attempt to uncover contact information for a number of anonymous blog posters to the Eclipse Critic blog hosted by the the online giant.
Since its inception a few years ago, the Eclipse Critic blog has been, well … upset at what posters see as insincerity at best by Eclipse and at worst downright fabrications about the shortcomings of the company’s only product, the Eclipse 500 Very Light Jet.
Many of the negative posts on the blog have, in the end however, turned out to be accurate.
Eclipse Aviation president Vern Raburn said his company does not wish to shut down the offending blog, but does not believe it is legal for unnamed authors to defame the company’s products while Eclipse simply stands by and watches from the sidelines. He said his company should have an opportunity to know precisely who is saying what about its products.
Google is reported to have passed the subpoena on to the Eclipse blog administrator. Making the task of locating the anonymous writers all the more difficult is that the Eclipse Critic blog administrator is an Irish citizen living in Ireland.
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Why Aviation Needs Smarter PR Practitioners
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Despite having spent a significant part of my life as a communicator, I know what people think about public relations. Many think it’s fluff. Some call it spin … that magical talent for transforming an often ugly issue into something else entirely to divert the reader’s focus … to force their brains to think about the other side of the story.
Regardless of what people think, however, a little work on the strategic and tactical communications dials and levers to convince people to see the other side of an issue is not always a bad idea.
Take airport community relations. Without it, most people living around an airport would never think about anything except aircraft noise. If a community relations program works well and adds a little much needed balance to the debate, everyone learns more about the economic importance of an airport.
However … the importance of using bright, truly clever communicators and letting them run with their gut feelings about an issue is critical, although in our industry even that doesn’t often seem to help much.
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Airline Unions Won’t be Fooled a Second Time
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The withdrawal of US Airways from the Air Line Pilots Association yesterday should be recognized as more than simply a disgruntled group of aviators in search of someone to plead their case about integrating an airline seniority list. The militant move by enough US Airways pilots to pull out of a union alliance like ALPA represents a shot across the bow to airline management. And no pun is intended here, especially since the US Airways pilot whose gun discharged a few weeks ago was reportedly fired from that carrier for the incident.
Pilots at United are just as ready for action over a possible merger with Continental or anyone else. ALPA members there said they’ll “fight, on every possible front, any attempt to merge our airlines at the expense of the pilots.” In general, negotiations with American and it’s pilots are also not going well. Northwest pilots are not ready to surrender their stake in that airline easily either.
A few weeks back, a story appeared in the Wall Street Journal article about the reduced bargaining power of unions now that the price of fuel seems headed for the stratosphere. The piece made mention of the airline industry as an example of where things are not simply sticky now, but will become even more so over the next year. The story says airline unions should be prepared for the worst.
I’d say everyone needs to be prepared for a fight because labor is coming back and their hands are out.
This may not be a time when a union is ready to chew off its own foot to send a message to management as the pilots of Eastern Airlines did to Frank Lorenzo in the early 90s, but the story about airline labor this year is not going to be a pretty picture for employees, passengers or shareholders.
All this labor strife couldn’t come at a worse time for the airlines, but I think that’s also the union’s strongest bargaining chip.
The pilot’s unions now have the ability to simply cross their arms and say “No, not this time,” to a proposal that doesn’t offer them a seriously considerable stake in any of the new ventures sure to be formed before the next president sits down to his or her desk in the White House next January.
For consumers though, the rest of this year is probably not going to be pretty, especially during this summer’s travel season. Don’t be surprised if there is at least one major airline strike designed to fire one more shot where management can’t miss the message.
And also watch for a few more airline brands to disappear.
Technorati tags: Air Line Pilots Association, ALPA, US Airways, United, Northwest, Continental, American Airlines, mergers, air travel, labor negotiations