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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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Patrick’s Aviation Videos: Our Own You Tube
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Curiosity coupled to the Internet means a chance to uncover a few thousand nooks and crannies that often hide some impressive content.
You Tube been a favorite in our house for some time with my 12-year old being a devoted fan, even if I do have to keep an eye on what she watches. An artist friend – Ken Smith – has also been posting for ages and got me watching it way too much, I think.
Show me a site with a search engine though and like any good airplane junkie, I type in “airplanes” or “aviation” or some such thing just to see what pops up.
And there’s plenty to watch.
But I’m also one of these writers who really believes in the copyright laws. I’ve found people peddling parts of my books online and the work it took to get them to either pay me or pull it off wasn’t pretty.
You’ll find plenty of copyrighted material on You Tube, primarily because the company just can’t keep up with the number of video segments people post each day.
That’s why I was impressed with the way copyright issues were handled when I wandered in the front door at Patrick’s Aviation Videos. They make it pretty clear before you click the upload button …
Copyright Policy
Per the Terms of Service, you must own all rights to videos you upload or have express permission from the copyright owner(s) to upload to Patrick’s Aviation.
By uploading this video you are representing that you agree to the Terms of Service.I liked that and took the time to track down owner Patrick Konsor to talk about the just over two-year old site. But not too long. I wanted to go back and wander around some more. Put this place on your must see list and pass the address around. You’ll find it on the Jetwhine blogroll. (more…)
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Remember When Talking About Aviation Was Just Plane Fun?
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Since it’s a beautiful spring afternoon in Chicago – sunny, temperatures in the high 70s (around 25 for you Celsius folks) it seemed like the right time to blog a bit about a piece of aviation that’s not quite as serious as the FAA, user fees or bad airline service.
One of these days when I head off to that great hangar in the sky – at least I hope it’s in the sky – I will have at least had the fun and excitement of owning an airplane of my own … no partners, no scheduling conflicts, just plain fun.
Have you?
Even if you haven’t, what would you buy if you could, no matter where you live in the world? Send us a few photos and we’ll post them at Jetwhine.
My first machine was a 1968 Champion Citabria (Airbatic spelled backwards)7ECA powered by a reliable O-235 Lycoming that never failed to start when I pushed the button to crank it up for some 650 hours worth of aviating over three years. One hundred and fifteen horses pulled me around the sky at a blazing 100 knots or so burning about five U.S. gallons per hour. Parking tie downs set me back another $35 a month and insurance at the time was about another $300 a year. (more…)
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FAA Has a User-Fee Bridge for Sale
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Henry Ogrodzinski thinks the FAA’s Valentine’s Day funding legislation is “a solution in search of a problem.” He’s the president and CEO of NASAO, the National Association of State Aviation Officials. We caught up with Henry O, as his friends know him, at the Texas Aviation Convention in Corpus Christi last week to talk about the bitter user fee fight that both business and general aviation have been sucked into against their well-armed foe, the U.S. airline industry.
Ogrodzinski and NASAO are founding members of the just announced Alliance for Aviation Across America, a 2,200 member group bringing new muscle to the user fee conflict on the side of business and general aviation. Other high-profile players in this alliance include Ed Bolen from NBAA, Phil Boyer from AOPA, EAA’s Tom Poberezny at EAA and Jim Coyne at NATA.
But Henry O was the man I came to talk to because he has the pulse of the local aviation manager scene. How can a general aviation David successfully fight back against an airline Goliath I wondered? A former director of public relations for EAA (you’ll find him inside the NASAO tent near the control tower at AirVenture every year), Henry O is a convincing speaker. He has one of those big wide smiles that makes people trust him immediately. And we can’t have too much of that right now. (more…)