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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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Regional Airline Flying is so a Career!
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OK, uncle …uncle!
You’d think that a guy who flew a regional airliner for a living would be smart enough to realize that not every regional pilot in the world would drop their lunch for a chance to fly a big jet at the majors. But I did imply that in a past column and a sharp-eyed Jetwhine reader called me on it.
Now for the truth.
Some of the best flying memories of my career took place in this regional airplane. It was my first chance to fly an airplane with a door I could open after the flight and offer kids sets of pilot wings for having flown on board. It was the first turbine airplane in which I experienced a partial engine failure (worked just like in training too). I actually was a major player in the air and on the ground during every minute of the flight. That certainly doesn’t happen at the majors.
Best of all, regional flying appealed to me because the lifestyle meant I was home more, certainly more than the longer corporate jet trips I’d see later in my career. If the airline I was flying for hadn’t gone bankrupt, my guess is I’d still be there. (more…)
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A380 VIP Tour … Let Me Know if You Win
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I don’t play the lottery because I really think the odds of winning are about the same whether I enter or not.
Since most of the people who read Jetwhine are about as plane crazy as I am though, I thought I’d pass along this chance to get up close and personal with the A380 when it comes to JFK on March 19th.
Lufthansa is promoting their order for 15 of the Super Jumbos by offering some lucky person the opportunity to join in the VIP tour of the aircraft that begins in New York.
If I might quote from the note I received from the PR company that’s nudging this along … “One lucky winner plus a guest will be selected on March 13 to attend an exclusive reception and VIP tour on board the A380. The contest is available here: http://www.Lufthansa-usa.com/A380 and gives the winner an opportunity to experience a behind-the-scenes viewing of the world’s newest and largest passenger plane more than a year ahead of its planned introduction to the general public.”
The turn around time is pretty short, so if you’re interested, head over to the Lufthansa site ASAP.
Come to think of it, maybe you should take a pass on this contest. That would swing the odds in my favor.
Technorati tags: A380, Airbus, Lufthansa, Jetwhine
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Aviation, TV and New Media
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Honestly, I don’t watch a lot of television, except for a few favorites like Doctor Who, The Daily Show, 24, maybe an odd movie from time to time, or the Sunday political talk shows.
Until last week, I’d say I actually never did more than react to TV content seldom even thinking how the bits come together to produce either a great television show or a dud.
When I think about the aviation industry and television too, there is usually even less to talk about. Can you quickly name one place on the Internet or cable TV to find video aviation news or features? And why not?
After spending last week at the Helicopter Association International show in Orlando as a TV news reporter and budding producer, I have to admit, I’ll never watch TV again and not think about the efforts of the production people behind the scenes. (more…)