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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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Counting Down to Top Gun: Maverick
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As one crawling into the final third of life, I’m in no hurry to write my final chapters. That said, May 27—when Top Gun: Maverick is due in our local movie house—cannot get here soon enough. To accelerate the passage of time, I’ve been searching out the teases issued by those who attended the premier and other early screenings and wondering where TG:M will land on my list of favorite aviation movies, and whether it will add to the list or displace a film already held dear.
First on the list is Top Gun. In its VHS form, it comforted me the summer of 1987 as I (and several dozen of my fellow faculty members) recovered from a case of Hepatitis A acquired at the boarding school’s end of year staff picnic. Yes, I’m the son of a World War II naval aviator too big and too blind (and now way too old) to follow in his footsteps, and the movie feeds my daydreams of what might have been had I not grown too tall and nearsighted.
But that’s not why it leads my list. Nothing will displace the memory of recovering to the point I could stay awake for more than a few hours, and then to actually want to eat something, and to enjoy some human contact. Hepatitis A can be quite contagious, so serious hand washing is a must. To protect my wife, who was carrying our oldest in his final trimester, we rarely spend much time in the same room that summer. That was not so for my friend Brian, who flew Cobras for the Army before joining the school’s staff, and his wife. She made the best brownies, and we feasted on them almost daily while we wore out that VHS and compiled a list of previously unseen bloopers, like the randomly spinning attitude indicator. Movie or not, there is more to life than airplanes.
Feelings of nostalgia, for an era of aviation that ended before I was born, unite the next to films on my mental tabulations of favorites, The Spirit of St. Louis, with James Stewart, and The Great Waldo Pepper, with Robert Redford. They depict a younger time, a barnstorming environment of adventure and possibilities when flying was finding its way forward. The two films embody the stick-and-rudder romance of open cockpits without the oil-scented reality of hypothermia and the face-to-face encounter with precipitation and insects.
Teamwork is the foundation of my next two favorites, the World War II epic, Twelve O’Clock High and Flight of the Intruder. To my aesthetic sense, no other movie better sets the scene when Harry Stovall pedals to the fence around what was his B-17 station and time rewinds with the sounds of an unseen Flying Fortress starting each of his four engines, their props forcing flat the grass he stands in. Set in the two-seat cockpit of the A-6, Intruder focuses on small scale teamwork during a period of unpopular conflict.
Finally, there’s Fly Away Home, the 1996 film that presents a gorgeously photographed dramatization of Bill Lishman’s effort to reintroduce birds to their migratory ways. The movie, with Jeff Daniels as Lishman, and Anna Paquin as his daughter, works with Canada geese. Operation Migration worked with whooping cranes. As entertainment, the geese work better, and I feed the film into the Blu-ray player whenever I need an emotional pick-me-up.
The pandemic-delayed Top Gun: Maverick is not the only aviation film I’ve been patiently anticipating. Devotion, the story of Jesse Brown and Thomas Hudner, based on Adam Makos’s book of the same title, is scheduled for release in October. Like TG:M, it was filmed using real Corsairs, Skyraiders, and Bearcats. If the film is half as good as the book, it will be a winner in my estimation.
So, what aviation films are on your list? Take a minute to share them in the comments because there will surely be some that the JetWhine community has either not seen or heard of. 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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EAA Corsair is Korean Vet Flown by Medal of Honor Recipient
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Few veterans that fought in World War II are still with us today, and that’s as true for aircraft as well as the pilots who flew them. It is especially true for the veterans who were recalled for Korea, America’s forgotten war, which concluded with an armistice on July 27, 1953. What we see today are stand-ins, reenactors appropriately attired to represent a specific person and point in time.
But there are rare, very rare, exceptions, and one of them is the Chance-Vought F4U-4 Corsair at the center of the Naval Aviation exhibit at the EAA Aviation Museum, which was dedicated April 22. This Corsair, BuNo 97259, flew combat missions over Korea with VF-32, with a number of different pilots, including Lt. jg. Thomas J. Hudner Jr., who flew the airplane after he sacrificed another Corsair on December 4, 1950 in an attempt to free his friend, Ensign Jesse Brown, the Navy’s first Black naval aviator, from his downed Corsair, a selfless act for which he received the Medal of Honor.
Rarer still, descendants of these aviators, Thomas Hudner III, and Jamal Knight, Jesse Brown’s grandson, sliced through the ceremonial ribbon. In his comments, his voice often emotionally hesitant, said their forefathers would find solace in the continuing relationship of the two extended families. Hudner climbed into his father’s Corsair cockpit well before the dedication commenced, and he described his time traveling tactile connection as “a truly surreal experience.”
Another was the January 29 text from Adam Makos, author of Devotion, the book that told the stories of Hudner, Brown, and some of the US Marines who received their air support during their slog out of the Frozen Chosin reservoir. (See Review: Devotion, a Unique Look at the Korean War) “He asked me to look in dad’s flight logbooks for BuNo 97259,” Hudner said, holding up a small, thin hardbound book covered in faded brown cloth. After telling Makos that he found several missions when he flew that airplane, “Adam told me that airplane was in the EAA collection, and then [EAA’s] Chris Henry shared photos of the plane’s logbook pages showing dad as the pilot on the same dates.”
Henry, a member of the EAA Aviation Museum staff, said the Corsair’s Korean connection revealed itself when he was digging through its documentation while preparing “for what we thought would be a routine webinar,” he said. “Sometimes you get lucky. When we got the Corsair, we also got all of its logbooks.” (And at the end of the dedication ceremony, from the family EAA received the loan of Hudner’s watch, wings of gold, and K-Bar survival knife.)
In paging through its flight log, “We discovered where it had been and who flew it; it inspired us to do more research, find photos, and contact family members,” he said. Because so few airplanes wear their hard-earned wartime markings, “We wanted to do the right things for the airplane.” The only deviation from its Korean colors are the names, painted in white block letters, under the canopy. Lt. jg. T.J. Hudner is on the port side, and Ens. J.L. Brown, is on the starboard side.
Simply referred to as 259 by the museum staff, the Corsair stands proud, its wing’s folded on a faux carrier deck elevator, its railing protecting it from visitors. Its nose points up as a copy of Matt Hall’s “Devotion,” a painting that shows Hudner landing wheels up in the snow, with Brown’s bent F4U in the background.
The Navy accepted 259 in October 1945. With the war over, it put it in storage. Returned to service in 1949, it first flew with Fighter Squadron (VF) 32, and then served with VF 33. The Navy sold it to a civilian in 1966, and in passing through several owners, it was a show plane and racer until 1974. Noted warbird pilot Connie Edwards donated the Corsair to EAA in 1982, and EAA invested 12 years in its restoration, painting it in the World War II markings of Marine Corps ace Ken Walsh.
Back in its original wartime uniform, 259 did not take part in the filming of “Devotion,” the major motion picture inspired by Makos’s book and expected in theaters sometime during October 2022. Unlike all the Corsairs and Skyraiders that flew for the movie, 259 is not airworthy. (See Devotion: Bearcats, Corsairs, & Real Moviemaking Oh My!)
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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Weather Forecasting Suffering Helium Shortage
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In early April, the New York Times reported that the National Weather Service has stopped launching weather balloons from nine of its 101 stations in the US and Caribbean because they don’t have enough helium to make the balloons lighter than air. Given the spectrum of weather technology, from Doppler radar to the geosynchronous GOES satellites, the data provided by the anachronistic weather balloons seems inconsequential. But nothing could be further from the truth. Like the hurricane hunters who wing their way into these storms, weather balloons provide essential data on small area conditions that make the computerized weather models more accurate.
The balloons carry radiosondes through a column of air that tops out somewhere around 20 miles, depending on when the 5-foot balloons burst. Normally launched every 12 hours, the radiosondes transmit the temperature, pressure, and relative humidity on the way up; the reusable radiosonde returns via parachute. The NWS feeds this data to the computer models used for short and long-term forecasts and the vast datasets that support climate research. When the NWS announced this situation in late March, it said the shortage of balloon-gathered data would not affect weather forecasts or warnings. (But we should all remember the unforeseen consequences of the distant flapping of butterfly wings.)
While helium, a colorless, odorless, inert gas that produces funny sounding voices when inhaled from party balloons is the second most abundant element in the observable universe, on Earth it is a rare and nonrenewable resource. Usually found in fields of natural gas, like those around Amarillo, Texas, the United States is the largest supplier of the gas. Russia has a processing plant at its natural gas fields, but it suffered a fire in January, the Times article reported. (There was no mention of sanctions on Russian helium, but that seems likely.) Once released into Earth’s atmosphere, helium continues it lighter-than-air ascent into the greater universe.
Hydrogen, which is lighter and more abundant than helium, is a lighter-than-air option for weather balloons. Some stations already launch their radiosondes with it, and it seems logical that its use will expand. Unlike helium, it is a renewable resource, but it has not been immune from supply chain delays. The pandemic has also disrupted another NWS source of small-scale weather data, the commercial airliners equipped with sensors that automatically transmit the atmospheric specifics of their current position. Surely the NWS is as happy as the airlines are to see people flying again.
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