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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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Review: Eric Brown’s Wings on My Sleeve, the Life of Flying’s Forrest Gump
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Like many history-obsessed aviation geeks, I had a passing knowledge of Captain Eric “Winkle” Brown defined by the most common bullet points that most often summarized his life. He was (he passed in 2016 at age 97) a Royal Navy aviator and test pilot who the Guinness Book of World Records says has flown more different aircraft—487—than any other pilot. (He also logged an astounding 2,407 landings on aircraft carriers.) So, when I came across his book, Wings of My Sleeve, during a regular reconnoiters of Half-Price Books, I bought it.
What captivated me was not the vast and diverse list of aircraft he’s flown, but from the people he’s met, flown with, and interrogated. Winkle is, without a doubt, the Forrest Gump of aviation. Born in Edenborough, Scotland, his father fought World War I with the Royal Flying Corps. A Royal High School student, Brown went to the 1936 Olympics with his father, who was invited to aviation events by the World War I pilots who made up the resurgent Luftwaffe. There he met Hanna Reitsch, a world-class glider pilot, and Ernst Udet, a top-scoring ace second only to the Red Baron, who took Brown flying in a Bücker Jungmann and put the two-seat biplane through its aerobatic paces.
In 1937 he entered Edenborough University in an honors course in modern languages, with German as his principal subject. He also joined the University Air Squadron and learned to fly. Visiting Berlin in 1938, he called on Udet, now a major general, who took Brown to see Hanna Reitsch fly the FW-61 helicopter at the International Automobile Exhibition inside the Deutschland Halle in Berlin. That evening, Reitsch some of his Luftwaffe friends celebrated the day at Udet’s apartment.
Recruited by the Foreign Office, he spend his penultimate year, 1939, in an exchange program that placed him for six months in France and another six months in Germany as a student teacher. “One of my favorite outings was to the popular city of Munich, and there I was staying in a small inn that fateful first weekend of September 1939.” That Sunday morning, he awoke to two SS officers at his door who informed Brown that their countries were at war. They knew everything about him, and after three days of interrogation, they abruptly drove him to the Swiss border and returned his MG and said he was free to go.
He drove straight to the recruiting station. With the RAF not yet realizing its need for pilots, Brown signed up with the Fleet Air Arm of the Royal Navy, which was hungry for pilots. Naturally, Brown had to learn how to fly all over again, the Navy way. Trained in fighters, this led him to test flying at Farnborough. And in 1944, he was one of a half dozen pilots who flew the Meteor. The only naval aviator, he was assessing the jet for carrier operations, and spent some time discussing this with Sir Frank Whittle, who designed and built the powerplant.
In March 1945, Brown got a 20-minute demonstration flight in one of the four Sikorsky R-4B helicopters lent to Britain. He and a squadron mate went to pick up two of them days later. When Brown inquired about who was going to teach them to fly this intriguing new machine, the U.S. Army tech sergeant assembling the helos handed him a manual with an orange cover. That’s how he became a rotary-wing test pilot, and in April discussed the results of autorotation air flow patterns through the rotors with Igor Sikorsky, who’d invented the flying machine he was testing.
With World War II reaching its conclusion, Brown, because of his fluency in German and aviation knowledge, became the commanding officer of the Enemy Aircraft Flight at the Royal Aviation Establishment at Farnborough. Its mission was to find and secure essential aviation aircraft and personnel, including Werner von Braun, Willy Messerschmitt, Dr. Heinkel, Focke-Wulf designer Kurt Tank, Hanna Reitsch, and the Horton brothers (leading glider designers), before the Russians did. His team didn’t get everyone on its list, but shortly after the war ended, Brown interrogated Herman Goering and several other high ranking Luftwaffe officers.
Others he interacted with before and after the war ended included Jimmy Doolittle, Grand Admiral Karl Donitz, Winston Churchill, Queen Elizabeth II, Prince Phillip, and many other notable names. But I won’t spoil these stories for you because reading this 296-page book is worth the time because Brown’s stories about flying 487 different aircraft are equally absorbing.
If you enjoyed this story, why not SUBSCRIBE to JetWhine, if you haven’t already, and please share it with anyone who might find it interesting. — Scott Spangler, Editor
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Pilot Transitions, Becoming Pluperfect
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As a word merchant focused on subjects aeronautical, people often ask if I am a pilot. Because a pilot certificate does not die (unless the holder surrenders or the FAA revokes it), my answer is always affirmative (pilot speak for you betcha!). Usually, the interrogation stops there because it is my turn to pose a question related to the word merchantly conversation I’m pursuing.
But sometimes my interlocuters persist. What do I fly? Almost anything that is currently airworthy that I can get into and apply full control inputs without bruising some part of my impeding anatomy (it’s a short list). Before they ask the next question, I explain that I am not now current. To once again fly as pilot in command I would need a current medical certificate and flight review. Call it pilot present and past tense.
Until recently, present and past tense described my relationship to the verb “to fly.” But a recent diagnosis of Parkinson’s Disease has put the possibility of a medical certificate in the realm of not worth the time, tests, money, and bureaucratic calisthenics necessary for a one-year special issuance medical. Closing the door on once again becoming a current, present tense pilot, calls for a new adjective, former, as in “having been previously.”
Pondering this transition, I realized that past perfect is the verb tense that talks about an action that was completed before some point in the past. It is also known as the pluperfect tense. Phonetically, my neurological affliction became Poppa Delta, and before he arrived, just before Covid-19 showed up, I used to fly as pilot in command. Without the possibility of once again exercising those privileges, I am now a pluperfect pilot.
Oh! The conversational possibilities this transition offers. Because I have not surrendered and the FAA has not revoked my pilot certificate, my answer to the primary question remains the same. Only those who persist will learn about Poppa Delta, the pluperfect pilot. This could be fun!
Some may wonder if this transition is a depressing downer? Absolutely not! Never having had the opportunity to become a pilot would be worse by an exponential degree. Now is the time to appreciate all the rewards that becoming a pilot has given me. It is time to recall warmly all of the once-in-a-lifetime adventures with heartfelt gratitude. And while I will never again be a current PIC, as long as I keep getting out of bed in the morning, being a pilot continue its rewards.
If you enjoyed this story, why not SUBSCRIBE to JetWhine, if you haven’t already, and please share it with anyone who might find it interesting. — Scott Spangler, Editor