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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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Aviation’s Favorite Blog Jetwhine Welcomes A Real Expert … Mr. Know It All
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Hello Jetwhine readers. Today we’re going to light up those little capillaries inside your cranium.
You all think you’re so smart don’t you? Well, here’s your chance to prove how much you know about aviation, general aviation specifically today.
Jay Ward Productions and Classic Media, Inc.
First the prize … a copy of Robert Mark’s new book, a Professional Pilot Career Guide, goes to the person who correctly answers this question.
“What aircraft was also known as a Mescalero?”
Sorry, no hints. We’ve been chastised for making these too easy anyway.
Put on those thinking caps and start typing ASAP and a copy of this awesome new book could well be yours. And no, there is no truth to the rumor that this author’s wife has made threatening remarks about his future on Earth if he fails to rid their basement of all the boxes of these volumes there gathering dust.
Technorati tags: aviation test, Professional Pilot Career Guide, Jetwhine, Pilots, pilot careers, general aviation, flight training
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First Cessna 400 "Lamborghini" Heads for Australia;Where’s Garry Now?
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As you read this, the ugly weather should have departed California headed east and Garry Mitchell should be taking off for another day’s flying. Mitchell’s office is often a bit of a moving target, so this week he’ll spend most of his time on board the first new Cessna 400 to be delivered across the azure-blue waters of the Pacific from the west coast of the U.S. to Brisbane Australia, a mere 6,500 nm solo flight. Mitchell is a ferry pilot and the entrepreneurial nudge behind Australian Air Ferry. This might well be the flight of a life time for most of us. The chance to hear more about this adventure certainly seemed worth a phone call before he left the U.S.
A veteran pilot with over 100 Pacific crossings to his credit in a variety of single and multi-engine airplanes, Mitchell says this delivery trip is going to be truly sweet because flying the new Cessna 400 is “like a flying Lamborghini.”
(Gary Mitchell poses with the first Cessna 400 headed to Australia)
For readers new to flying single engine airplanes over long distances, this kind of trip is sure to test any pilot’s knowledge of navigation, flight and fuel planning, as well as the limits of their body. It’s nearly 40 flying hours over four to five days to complete the trip to Brisbane. Mitchell flew for the regional airlines years ago but grew bored seeing the same places every day. That’s when another long-distance ferry pilot found Garry and convinced him to give this kind of flying a try. He’s never questioned that move.
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"What?" … I said, "Most Old Pilots’ Hearing is Shot"
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People who fly airplanes for a living often share some of the same ailments in their older years found among other workers who also operate obnoxious moving machinery … jack hammers, high-speed riveting machines, drag racers.
My wife and daughter are constantly amazed – and embarrassed – at how I manage to survive in the world with such awful hearing, a remnant of too many years of flying small airplanes with no earplugs or headsets. I pass the FAA physical each year, but that only measures the strength of the audio signals I can hear. There is no place in the exam to figure out how well I decipher conversation across a busy room. Take heed my younger friends … too many years of no hearing protection has left me often baffled by whether what I’m hearing is romantic discourse from my bride in a trendy restaurant or the appeals of my mate in search of a new garbage disposal.
With that in mind, I offer you this story about a three-person flight crew from an old Boeing 727.
All of these pilots probably climbed the flying career ladder the same way I did in small airplanes and are now paying the price for hearing well, but often understanding little.
I’d like to thank my friend Pete at FedEx for reminding me of how this little tale goes. I think he told me once but either I forgot or never heard it right the first time.
Disclaimer … Humorous joke follows. Some younger or more sensitive readers may not get it.
During a layover in Wichita, the crew is waiting for the van to take them to the hotel. In true Kansas style, the wind is howling up a storm at the airport.
First Pilot: “Boy. It sure is windy out here.”
Second pilot: “It’s not Wednesday, it’s Thursday.”
Captain sums it all up: “Yeah, I’m thirsty too. Let’s go have something to drink.”