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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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Pandemic Aviation Records
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The pandemic has reordered the routines of life in many ways, and that includes the almost annual National Aeronautic Association announcement of the previous year’s aviation records. But Covid-19 restrictions waylaid the submission of aviation records to be certified by the NAA and forwarded to the Fédération Aéronautique International for their global ratification. Consequently, NAA’s Contest and Records did not review certified records for 2019, 2020, or 2021. But it has now, and it announced the most memorable aviation records for this span of pandemic history.
The announcement of these 11 memorable records is but another measurement of Covid consequence. Presenting them chronologically, there were six in 2019 and five in 2021. As it may be for many in the world, for aviation record hopefuls 2020 is a year that didn’t’ exist (and let us all hope we never have another one like it). These new record holders will be honored at the NAA Aviation Record Celebration at the Lockheed Martin Fighter Demonstration Center on April 28, 2022.
Another eternal question is what defines a “memorable” record? I haven’t found NAA’s definition, but the dictionary says “memorable” is something “worth remembering,” and for the people who pursued them, these records are certainly that, just as it is for the people who set the records the current flights eclipsed. But a subjective definition of “memorable” is illuminated with some degree of gee-whiz or wow!
Reading through the 11 Most Memorable Aviation Records of 2019-2021, few of them inspired a wow from me. Dierk Reuter and Phillips Bozek’s 2019 nonstop flight in a Daher TBM 700 from Westchester County Airport in White Plains, New York, to Le Bourget in Paris was interesting. Not because they covered 3,600 miles in 8:35, but because the surpassed the record set by Chuck Yeager and Renald Davenport in 1985.
Kim Magee’s 2019 hot air balloon flight gets my wow! And a GEE_WHIZ!! Lifting off from a school parking lot in Mitchell, South Dakota, she climbed to 15,000 feet, where strong winds carried her for nearly six hours, across Sioux City, Iowa, past Des Moines, for “a landing along the Fox River just north of the Missouri River,” setting a 363.3 distance record.
My other wow goes to John Ellias, who hand-launched his remote-controlled glider at an abandoned airfield in Pioche, Nevada, jumped in the back of an open air 4×4 Jeep, and flew northbound along US Highway 93 towards his straight-line goal of a field near Wells, Nevada, 214.93 miles away. He also earns a gee-whiz honor, not because the record flight took 7 hours and uncounted thermals, but because he surpassed the 187-mile straight-line record he set in 2016.
And here’s another question for you. Of this group of memorable aviation records, which ones would earn your gee-whiz and wow awards?
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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The First F-15 Was a Reporter
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Researching the 75th anniversary of Project Thunderstorm, conducted at the U.S. Air Force’s All-Weather Flying Center in Wilmington, Ohio, from May to September, 1947, I admired the courage of the volunteer pilots, weather observers, and airborne radar operators that flew instrumented Northrop P-61 Black Widows into convective thunderstorm environments on purpose. But what triggered the curiosity that sent me down the research rabbit hole was the mention of an airplane I’d never heard of, the F-15 Reporter. (That’s it, last in the line of P-61s.)
Like the jet-propelled F-15 Eagle, the two-person crew of the piston-powered Reporter sat in tandem beneath a long bubble canopy, and both bear the F designator, which stood for photographic until the Department of Defense overhauled its designation system for U.S. Army and U.S. Air Force in 1947, when pursuit planes like the P-80 Shooting Star became fighters with an F, and fotographic flyers like the F-15 became reconnaissance aircraft, as in the RF-61. The second designator identifies the base airframe, in this case the P/F-61.
The F-15 is essentially an F-5 Lightning on steroids. Both had twin booms that supported the powerplants, water-cooled Allisons in the F-5 and air-cooled Pratt & Whitney R-2800 radials in the F-15. One look at their planforms, it was clear that the F-5 is a P-38 and the F-15 is a P-61 with a new canopy and a center nacelle full of cameras. Although Northrop only built 36 of them, the Reporters, the Air Force’s last piston-powered photo reconnaissance aircraft provided vital views of the Korean peninsula when north invaded south in 1950.
All but nine of the F-15s flew with just one squadron, the 8th Photographic Reconnaissance Squadron, which was attached to the 35th Fighter Group in Japan. Formed in 1942, the 8th flew F-4/F-5s in the South Pacific and island hopped its way toward Japan with General Douglas MacArthur, and became part of the U.S. Army of Occupation in August 1945. After standing down in April 1946, the Air Force reactivated the squadron with F-15 Reporters, the it started flying photographic mapping missions over Japan, Korea, Philippines, and other Pacific landmasses in July 1947.
In Japan, the Post-Hostilities Mapping Program extensively photographed beaches, villages, road networks, and cultural centers. The F-15s were not the only photographic F-birds so employed. Working with them was the F-13, which turns out was a variant of the B-19 Superfortress. The F-15s (or RF-61s, as they were then designated) started flying tactical recon and mapping sorties over North and South Korea on June 29, 1950 and were the only recon resource until U.S. Marine Corps Grumman F7F-3P photo Tigercats joined the war later that year. The F-15s, as the 8th continued to call their photo mounts, flew their final sortie on February 24, 1951.
The surviving F-15s went to government agencies, like NACA, which used one as the mothership that dropped early swept-wing designs and recoverable aerodynamic test bodies from high above Edwards Air Force Base, and others were surplus sales to civilians. The last flying example of the entire P-61 series was the first production F-15A Reporter out of the Northrup factory. Sold as surplus in 1955, it did aerial survey work in California and then, in 1956, Mexico. It returned to the United States in 1964, where Cal-Nat turned it into a firefighting tanker by adding a 1,600-gallon tank. TBM Inc., another aerial firefighting operator bought the F-15 in 1968, and it made its last flight fighting a fire that September, aborting a takeoff from a too short strip and ending up in a vegetable field. Another TBM aircraft doused the burning Reporter with its load of fire fighting slurry.
Anyway one looks at it, the F-15 didn’t have an easy life. With cameras replacing its guns, in Korea all it could do was run from pursuing North Korean MiGs. Its firefighting life didn’t turn out so well either. And then there was Project Thunderstorm. Besides its photographic duties, it carried additional instruments into growing towers of cumulonimbus. And for a change of pace, another F-15 flew to Naval Air Station Minneapolis where it was fitted with instruments, affixed with lightning rods, situated in a Tesla torture cage, and struck with manmade lightening of 8 million volts and 250,000 amps. A copper bar connected to the canopy dissipated 4 million volts and 50,000 amps, a reality I’m sure the person sitting in the pilot’s position was happy about.
Taking one final turn on this curiosity crusade, what about the F-birds between the F-4/5 Lightning and F-15 Reporter. The F-3 was an A-20. The F-6 was a P-51 Mustang. The F-7 was a B-24 Liberator. The F-8 was a de Havilland Mosquito. The F-9 was a B-17. The F-10 was a B-25. The F-11 was Howard Hughes’s ill-fated photo recon X-bird. The F-12 was a new design, the four-engine Rainbow, built by Republic. The F-13 was the aforementioned B-29. And the F-14 was the first jet, a Lockheed P-80 Shooting Star. There’s a book in there somewhere.
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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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.
Reichsmarschall Herman Goring (left) and Udet, head of the technical office of the air ministry, observe aerial maneuvers by the new Luftwaffe on June 16, 1938. (Ullstein Bild via Getty Images) 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