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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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Review: Devotion, a Unique Look at the Korean War
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Tipped off by the movie being made about its story of Jesse Brown and Medal of Honor recipient Tom Hudner (see “Devotion: Bearcats, Corsairs, and Real Moviemaking Oh My!“), I found the book in our local library system. In Devotion: An Epic Story of Heroism, Friendship, and Sacrifice, author Adam Makos surprised me. Not only did he tell the story of Brown and Hudner, he told similar stories of heroism and friendship of the Marines the aviators were closely supporting from the air as they fought their way out of the Chosin Reservoir early in the Korean War. But what made these 445 well-illustrated pages unique were the first-person recollections of the participants.
This historical gift exists because a 26-year-old Makos summoned the courage to walk across a hotel lobby, introduce himself to Thomas Hudner, a speaker at a 2007 veteran history conference he’d just attended, and asked if he could schedule an interview. Hudner agreed, and one interview led to many more with Hudner and more than 60 real-life “characters” in the book, carrier pilots, Marines, their spouses, siblings, and offspring. Makos found the bones of their stories in the nation’s archives, but like a gifted anthropologist, he fleshed them out with their recollections that are so concisely vivid that you’re with them in the cockpit or frozen foxhole.
When I started reading, I thought I had a good working knowledge of the Korean War and the particulars of Jesse Brown’s final flight, which ended behind enemy lines northwest of the Chosin Reservoir when ground fire created an oil leak that led to an engine failure. But new and often corrective information surprised me on every page. Unable to stop turning pages, I devoured every one of them in two nocturnal marathons that went past 0130.
With VF-32 embarked on it, the USS Leyte (CV-32), an Essex-class carrier homeported on the East Coast, was in the midst of a Mediterranean cruise when it was reassigned to Korea. This is where it connects with the Marines in the story, and a chance encounter with the 18-year-old Elizabeth Taylor connects them with the aviators of Fighting 32. And the ship carried the Marines on the first leg of their journey to Korea to bring the undermanned post World War II divisions closer to their fighting strength. On its way to Korea from a supply stop in Japan, the Leyte carried to Korea the first cohort of Marine helicopter pilots, including Charlie Ward. They shared a ready room with VF-32, and Ward would see Brown and Hudner again, and fly Hudner away from the two downed Corsairs northwest of the Chosin Reservoir.
Because he outranked Brown, I’d always assumed Hudner was the flight lead, but it was the other way around because Brown had more flying experience. After graduating from the naval academy, Hudner served a year in the surface Navy before putting in for flight training, and he flew Skyraiders before joining VF-32. After two years of architectural studies at Ohio State, Brown became the Navy’s first Black naval aviator through the NavCad program. After earning his wings he went to VF-32, which was flying Bearcats. Just before the Leyte’s Med cruise, the squadron transitioned to Corsairs and a close-air support mission.
Over the years I’ve read various, often conflicting, accounts of Brown’s final flight, when he died, and what transpired afterwards. The book discusses briefly these media machinations, which withheld the truth from Brown’s wife, Daisy, until she finally met Hudner at the White House when Truman draped the Medal of Honor around his neck.
When Brown landed on the mountainside, the terrain rippled Corsair’s R-2800 from the nose, bending the fuselage and pinning his right leg between the center pedestal and the outside of the cockpit. With a message relayed by squadron mates overhead, Ward returned to his helo base for an axe. Despite their best and strenuous efforts, the tough old Corsair did not yield. But by then, after giving Hudner a message for his wife, Brown was gone.
According to photo recon planes, the North Koreans were also unsuccessful. When the Leyte’s captain asked if he should steer close to the coast to launch a helo with the flight surgeon could surgically remove Brown, Hudner shook his head and said, “Sir, those mountains are teeming with Chinese and that helicopter makes an easy target. There’s a good chance more men are going to get killed…I know Jesse wouldn’t want that.” The skipper had a second plan, a warrior’s funeral officiated by a flight of four carrying napalm. “I think Jesse would understand,” Hudner said, “And, sir, our squadron should be the ones to” conduct this funeral flight.
There are very few nits to pick with this book. The primary one is the author’s desire not to confuse civilian readers with military terms. This is why he consistently referred to the Leyte’s island, which rises above the carrier’s flight deck amidships on the starboard side as the “tower” and the officers mess or wardroom as the “dining room.” On the other hand, Makos did a superb job describing race relations by showing, not telling. Just as readers feel like they are in the cockpit or frozen foxhole, they will be silently in line to the air group commander’s office door to deliver their contribution to a college education fund for Brown’s daughter, Pam.
Tom Hudner’s final words to Jesse Brown were, “We’ll be back for you.” In 2013, at age 88, he took matters into his own hands and traveled to North Korea. Military officers were waiting when he arrived. Two days later, in the capital of Pyongyang, Hudner put on his Medal of Honor, faced “a North Korean colonel and his staff,” and asked them to begin a search for Brown’s remains. The colonel read the prewritten reply, North Korea’s supreme leader “granted approval to his army to resume the search for the remains of MIA American servicemen—beginning with Jesse Brown.”
With photos from the Adam Makos website, the author continues to deliver first-person history because he traveled to North Korea with Hudner. Jesse Brown, who died on December 4, 1950, still rests somewhere northwest of the Chosin Reservoir. His wingman, Thomas Hudner, died on November 13, 2017 and is now at rest at the Arlington National Cemetery.
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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Devotion: Bearcats, Corsairs, & Real Moviemaking Oh My!
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Nothing ruins the enjoyment of a good aviation film more thoroughly than computer-generated images. Real moviemaking, filming real airplanes is what makes movies like “12 O’Clock High” and “Top Gun” so memorable. That’s why I’m eagerly awaiting “Top Gun: Maverick” and a new film that aims at the advanced, HD technology used in Top Gun 2 on F4U Corsairs and an F8F Bearcat in the Korean War story of Jesse Brown and his wingman, Medal of Honor recipient Thomas Hudner.
The film is based on Devotion: An Epic Story of Heroism, Friendship, and Sacrifice, written by Adam Makos (and I’ve just ordered a copy). Ensign Jesse Brown was the Navy’s first African-American fighter pilot, and Lieutenant Junior Grade Thomas Hudner was his friend and section leader in Corsair-equipped Fighter Squadron (VF) 32. Over North Korea, the ground fire brought down Brown on a close-air support mission for the Marines fighting their way out of the Chosin Reservoir on December 4, 1950.
With the ground fire hitting the Corsair’s oil tank, Brown made a forced landing on a snowy mountainside. Smoke wafted from the downed Corsair’s cowling and Brown waved from the cockpit but did not get out of it. Realizing the rescue helo they’d call would not arrive in time, Hudner belly-landed his Corsair near his friend and attempted to free him from the cockpit after he put out the fire with snow. Hudner could not free Brown’s legs, even with the aid of the crew of the helo when it arrived.
With the film’s production team striving to shoot as much of the film as possible “in-camera” (meaning real airplanes in flight), they turned to aerial coordinator Kevin LaRosa Jr., who’s done a lot of air-to-air work in films including “Captain Marvel” and “Top Gun: Maverick.” One of those cameras will be the new 6K digital camera, the Red Komodo. The producers told LaRosa that they wanted what he delivered for Maverick, times 10.
LaRosa has compiled a fleet of 11 aircraft, Corsairs, Bearcats, Skyraiders, and MiGs, all repainted in accurate squadron colors (VF-32 Bearcats and transitioned to Corsairs for Korea). With helicopters and the CineJet, L-39 with a nose-mounted camera, they have been shooting somewhere in Washington. The aerial director of photography is Michael FitzMaurice, who also shot the air-to-air for Maverick.
All I’ve seen are the trailers to Maverick, and the best one is the extended Super Bowl version that offers a tantalizing behind-the-scenes look at its aerial production. So get vaccinated so we can achieve herd immunity and return to theaters so we can finally see these films on the big screen, better yet, the overwhelming IMAX!
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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B-17 Concrete Ordinance? The Disney Bomb
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YouTube is a good weekend destination when the wind chill is in double digits because it usually inspires a curiosity quest. It started with The Doc Furness War, a 96-minute aggregation of 16-mm color motion pictures taken by the flight surgeon of the 92nd Bomb Group based at Paddington, UK. If you’re curious about life at a World War II B-17 base, this one covers all aspects of life, from passes to London to flying combat missions (with none of the Memphis Belle film you see in so many other productions).
The narrator does an excellent job of expanding the moving images with detailed words. He explained, for example, that the long, pointy cylinders the crews were mounting below the B-17’s wings, one on either side of the bomb bay were “Disney Bombs.” A US Army Air Pictorial Service film said General Doolittle’s men called it the “Disney Swish.” The B-17s dropped the 18-foot bombs on hardened targets like submarine pens and rocket sites.
So what’s the connection to Disney? And is that Mickey Mouse’s Disney? Apparently, the weapon was inspired by the bomb that took out a Nazi sub pen in a propaganda film, Victory Through Air Power, made by Walt Disney.
But wait, the story is even more unexpected. A Royal Navy officer, Captain Edward Terrell, who served in the Royal Naval Volunteer Service with the Directorate of Miscellaneous Weapons Development, imagined the weapon, officially known as the “4500-pound Concrete Piercing/Rocket Assisted” bomb. The solid-fuel rocket boosters gave it the added Swish to penetrate 16 feet of solid concrete. Gravity alone accelerated the Britain’s 10,000-pound Tallboy bomb to 750 mph. The Disney hit at 990 mph.
Built in three sections, the thick armor piercing steel warhead was 11 inches in diameter and filled with 500 pounds of explosive. The center section, 19 inches in diameter, held 19 3-inch rocket motors. The tail section held the necessary electrical circuits and wind-powered generator fan blades. A time delay or barometric sensor ignited the rocket motors, and the bombers had to drop the rocket-accelerated weapons precisely from predetermined altitudes.
In other words, the Disney Bomb rarely hit its intended targets. And this explains why the British bomber command, which usually practiced area bombing at night, never launched a Disney bomb. Believing the Army Air Forces claims of its daylight bombing accuracy, founded on the Norden bombsight, the British joined forces with Doc Furness’ outfit, the 92nd Bombardment Group.
During a March 1945 raid on submarine pens under construction at the port of Farge, not far from Bremen, 30 B-17s launched 60 Disney Bombs. One of them hit the target. Given this success rate, Disney development ended not long after the war. Clearly, all it needed was the GPS guidance system used on today’s Joint Direct Attack Munitions (JDAMs). In 2009, the 8th Air Force scored another hit when the body of a Disney Bomb, and its 500-pound warhead, were extracted from the thick concrete roof of a bunker in Watten, a V-2 launch bunker, now a private museum.
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