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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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Presidential Aircraft: Standing in History
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Following Interstate 70 from one assignment in Indiana to the next in Maryland, a sign announcing the approach of Dayton inspired a deviation. I could spare a few minutes for a quick walk through the fourth building at the National Museum of the United States Air Force, which opened in June 2016. Parking and admission are free, but my quick walk through turned into a nearly 3-hour investment because I didn’t expect an absorbing inside look at history in four presidential aircraft.
Visiting before lunch on Wednesday in the final week of September, I had time to stand in the aisle of each, unsuccessfully trying to comprehend that I was following in the footsteps of Presidents Roosevelt, Truman, and Eisenhower, each identified with a specific airplane powered by four robust piston engines, and SAM (for Special Air Missions) 26000, the VC-137C (a Boeing 707-320B). During its 36-year career, it served eight sitting presidents: Kennedy, Johnson, Nixon, Ford, Carter, Reagan, Bush 1, and Clinton.
Of the aircraft in the museum’s Presidential Gallery, SAM 26000 is the most significant to Baby Boomers because they lived through its history. It is the airplane that carried Kennedy to Berlin in mid-1963 and his body home from Dallas six months later. You can think about that while reading the placard in the cabin where the crew removed a partition and seats to make room for his coffin. Pile on top of that the knowledge that this airplane carried Johnson to Vietnam and Nixon to China.
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Flight Instructors to Remember and Forget
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After 40 years of flying, flight instructing and communicating throughout the aviation business, it’s almost impossible for me to remember that of all my flight instructors, I almost allowed my first ago to drive me completely away from the business. Although he’s long gone from aviation, the lessons are still significant enough to pass on today at a time when the industry’s hunting and pecking for every possible student pilot. Lucky for me, another CFI entered my life years later and completely turned my world around.
In 1966 I was a 17-year old freshman at the University of Illinois Institute of Aviation and anxious to learn to fly. I never doubted my goal … to be an airline pilot.
In those days, student pilots and instructors at the school were randomly paired and I drew a guy named Tom. We flew the mighty 90-hp 7FC Tri-Champ with the student in front and the instructor behind.
School began in late September with ground school and the “Box,” a name we’d all attached to the Link trainer we were expected to partially master before we took to the air. I never realized I was a bit claustrophobic until the first time Tom sat me in the box, closed the door and pulled the cover down on top of me leaving me in nearly total darkness.
Why Was Always a Big Question
We didn’t brief much before we began so not surprisingly, the sessions didn’t go well since I never really understood the point of moving a control stick inside a dark little room as dials and gauges spun like mad before my eyes. Looking back on it today, I realize Tom talked a lot, asked few questions and simply assumed I was following along. I wasn’t since I’d never even been inside the actual airplane.
Finally one day I flew.
I clearly loved every moment in the air despite being nearly clueless about what I was supposed to be doing, except for reminders from the back seat like … “what are you doing that for?” It was at about the five-hour mark that things started getting ugly because I just didn’t seem to be getting things to come together.
There was this landing practice session that still sticks out in my mind. Right near the runway on the first few, Tom started yelling … “Flare, flare, flare.” Crunch! The Tri-Champ was pretty forgiving despite hitting hard enough to knock the headset off my head a few times. After an hour of punishing flying, we taxied in and shut down. Tom grabbed my shoulders and shook me hard from the back seat. “Why didn’t you flare when I told you too?” Somewhat worn out I just stared out the windshield and asked, “What’s a flare?” was all I could muster.
I actually managed to solo the next week and was cleared to fly the pattern that helped my confidence enormously. But soon I was back in the Tri-Champ and the Link with Tom and the yelling began again. To make matters worse, he began slapping me along side the head and yelling when I screwed up. With 15 hours total time, I finally broke. At 17 I knew I would never learn to fly. I quit school AND flying and never touched the controls of another airplane.
Until …
Jump ahead five years as I arrived to my last Air Force duty station at Bergstrom AFB, now Austin Municipal airport. How I got there is too long a story right now. It’s what happened next that’s important.
Within a few days of arrival I found the base flying club. Outside the main door near the aircraft parking area they’d installed a small set of stadium seats. I’d sit there watching the Piper Cherokees come and go, some with two people inside, some with just one. I didn’t go into the clubhouse though.
One day, I headed to the flying club to watch airplanes and eat my lunch. A Cherokee 140 pulled up near the fence, but the engine didn’t shut down. The guy in the right seat seemed to be talking to the pilot in the left. Finally the door opened, the guy in the right seat hopped out and shut the door patting it a few times, maybe for good luck I though. As the airplane taxied away, the right seat guy passed me saying hi as he did. Half an hour later the Cherokee returned and that same guy left to greet him. Later I learned the pilot was on his second supervised solo and the fellow who’d waved to me was his instructor.
Maybe a week or so later I’m back out on the seats watching the airplanes when that same instructor comes out of the clubhouse door. He looks around and happens to see me so he walks over. “Why aren’t you out there flying on such a beautiful day,” he asks. “I’m not a pilot.” “Really?” he says. “You sure hang around here a lot for a guy who doesn’t fly. My name’s Ray. Stop in one of these days,” he said before turning away toward one of the airplanes. The gauntlet had been thrown down.
I didn’t go back to the viewing area the rest of that entire week. It was simply too scary to think of being close to something I really loved, but at which I’d already failed. The next week though, I did go back, but only back to the seats.
To this day I think Ray was watching for me because he came out of the clubhouse door and waved … “Well, are you coming in?” I sighed deeply but got up and followed him in the clubhouse door. And that, as they say, was that.
Over some coffee, I told Ray my story of failure. It didn’t even slow him down because an hour later we went out flying … and I never stopped again. I went on to earn my ATP and my own flight instructor ratings, fly for a couple of airlines, a charter company and a couple of Part 91 corporate flight departments. As an aviation writer, I even managed to grab a couple of hours in an Airbus A-380. It has all been just so sweet.
My instructor Tom nearly ended my aviation career, but luckily there was another fabulous instructor like Ray out there waiting to offer me a hand up with a little encouragement, which is all I apparently needed.
Today I wonder how many instructors like Tom are still out there. Trust me, one like him is one too many.
So here’s a suggestion. When you see someone watching through the fence, go say hi and offer a little encouragement to that budding pilot. These already-eager people are the low-hanging fruit for instructors and we can’t afford to lose a one of them.
Who knows, you might just be the one to change that wannabe-pilot’s life.
Rob Mark