-
Making the Brazilian ATR-72 Spin
by
[sc name=”post_comments” ][/sc]
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…)
-
How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
by
[sc name=”post_comments” ][/sc]
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…)
-
How Many Aircraft did Chuck Yeager Fly?
by
[sc name=”post_comments” ][/sc]
Living with an editor’s mindset is no easy thing, especially when faced with inconsistent “facts” in stories presented by different sources on a common topic. In this case it was the death of Chuck Yeager. Publicity throughout his life has made much of his signature aviation accomplishments, guiding the X-1 through the sonic barrier, surviving a high-altitude misadventure in the NF-104 Starfighter, but postings on his passing could not agree on how many different types of aircraft he flew or how many flight hours he’d logged.
This i-Quest started with the New York Times, the obituary gold standard. “Chuck Yeager, Test Pilot Who Broke the Sound Barrier, is Dead at 97” said “He flew more than 150 military aircraft, logging more than 10,000 hours in the air.” Like any curious aviation editor, I wanted to know what aircraft were on that list, beyond the ones I already knew about, the P-39, P-51, X-1, and F-104. Google offered me “About 3,474,000 results (0.75 seconds),” and that’s when the trouble began.
ChuckYeager.org parrots the Times’ obit word for word (including Richard Goldenstein’s byline), but the website does not provide a list of those “more than 150 military aircraft.” Scrolling through the site’s timeline of Yeager’s life, from his birth in 1923 to 1997, revealed some of them.
Stationed at Wright Field in Dayton, Ohio, after the war, he flew the P-80 Shooting Star and P-84 Thunderjet. “He also evaluated the German and Japanese fighter aircraft brought back to the United States after the war.” I remember reading an article by Grumman test pilot Corwin “Corky” Meyer, who also flew these aircraft at Wright Field, and how the FW-190 influenced the F8F Bearcat.
Yeager commanded a number of squadrons during his career, but aside from the F-100 Super Saber, it didn’t’ identify what aircraft they flew. The timeline concludes with “AND BEYOND,” saying, “General Yeager has flown 201 types of military aircraft, and has more than 14,000 flying hours, with more than 13,000 of these in fighter aircraft.”
Several days after he died, Popular Mechanics published “The Eight Planes That Tell the Story of Chuck Yeager’s Career.” Among them is the Messerschmitt Me-262 jet. Yeager didn’t fly it, but he did shoot one down as it was on approach to landing with his P-51. During Vietnam, he commanded five different units that flew the F-100, F-102 Delta Dagger, and the F-4 Phantom, but the Martin B-57 Canberra was his predominant mount, and he logged 414 missions in it. At the end of this section of the article, PM says, “Yeager flew his final active-duty Air Force flight in 1975, by that time accumulating 10,131.6 flight hours in 361 different types of airplanes.”
The WarZone on The Drive told a similar story, “Chuck Yeager’s Amazing Life Told Through the Airplanes He Flew.” Like the Popular Mechanics article, it listed the Beech (18) AT-11 Kansan, which Yeager maintained after he enlisted in the Army. That he flew it seems to be an assumption. “It was onboard an AT-11 that Yeager got his first taste of flying and the airsickness he experienced sitting alongside the pilot made him, briefly, have second thoughts about a future career in the air.”
The story added the BT-13 and AT-6, which makes logical sense, as they were the basic and advanced training aircraft of the day. During a tour at Edwards Air Force Base during the Korean era, he went to Kadena Air Force Base in Okinawa to fly a MiG-15 donated to the American cause by a North Korean defector. Command of an F-86 Sabre squadron followed.
Back in the world of flight test, the WarZone story revealed that Yeager was the first Air Force pilot to fly the NASA M2-F1 Flying Bathtub in 1963. He wanted to see if the wooden wingless lifting body would be a suitable trainer for the Aerospace Research Pilots School, aka the Air Force Test Pilot School. This raised my editorial hackles because the article didn’t answer the question it posed; did the school use the engineless bathtub as a lifting body trainer?
This article touched on the Northrop F-20 Tigershark that Yeager helped market to the world, and the F-15 he crewed for a celebrity flight celebrating the 50th anniversary of his sound-breaking flight in the X-1.
Searching the online National Museum of the USAF revealed nothing more than a long list of artifacts in its collection, from photos, to the flight suit he wore on his historic X-1 flight, to that MiG-15 he flew in Okinawa.
I saved Wikipedia for last, sure that some dedicated aviation history geek would have researched and listed all of the aircraft Yeager flew during his career. But there was no joy. While the entry highlighted those already known, this is all it said, “Throughout his life, he flew more than 360 different types of aircraft.” There wasn’t any attribution for this, not even a footnote. Bummer. Living with an editor’s mindset is no easy thing. — Scott Spangler, Editor
-
Defensive Pessimism & Aviation Experience
by
[sc name=”post_comments” ][/sc]
Pursing my eclectic interests, the library emailed a curbside pickup notice for David Rakoff’s Half Empty, as in the pessimist’s assessment of a glass vessel whose volume is divided between some unknown liquid and the ambient atmosphere. On the cover, a sunburst subtitle boldly says, “WARNING!!! No Inspirational Life Lessons Will Be Found In These Pages.”
From his satirical perch and using examples from his own life, Rakoff devotes 224 pages to thoughtfully dismembering our sunny delusional culture, but the subtitle warning is a lie. On page 9 is an important life lesson, especially for pilots of all aeronautical genres who approach aviation with an optimistic outlook. An optimist is naïve he writes, supporting this evaluation with the words of a Prohibition-era newspaperman, Don Marquis, who wrote in 1927, “an optimist is a guy that has never had much experience.”
Experience is important because, in most cases, it “shows you how much more you have to learn.” How well people, pilots especially, learn (and apply) experience’s lessons subtly refines their pedagogical inclinations, how well they perceive—and retain—what the situation is trying to teach them. Given the repetitive causes of most aviation accidents, what too many pilots seem to get from first-hand experience is the self-centered joy, if they survive.
If they don’t, aeronautical Darwinism guarantees that they won’t again forge the error chain that anchored their demise. But the resulting accident report shares the lesson with other aviators, if they are so interested. Whether they learn from the misadventures of others and how to avoid following in their flight-path or dismiss this shared experience by silently acknowledging that THEY would never do this, depends on how they see that aforementioned glass vessel.
With a pilot-appropriate weather example, Rakoff writes, “Where a strategic optimist might approach a gathering rainstorm with a smile as his umbrella, a defensive pessimist, all too acquainted with this world of pitfall and precipitation, is far more likely to use, well, an umbrella.”
He wasn’t writing to or for pilots, but this one fits. “Defensive pessimism is about sweating the small stuff, being prepared for contingencies like some neurotic Jewish Boy Scout, and in so doing, not letting oneself be crippled by fear.” It is, perhaps, the step before one becomes a pragmatic realist who, upon seeing the aforementioned vessel asks if the person responsible was adding to or draining away the liquid it contains. — Scott Spangler, Editor
-
A Glimmer of Light Ahead for the Aviation Industry
by
[sc name=”post_comments” ][/sc]
Boeing 737 MAX 7 For the thousands of us who call the aviation industry home, 2020 turned out to be a year we’ll be glad to see the end of although the change of calendars won’t wipe away many of this year’s problems. The highly-contagious coronavirus wreaking havoc on our planet stuck its ugly tentacles into nearly every aspect of life on Earth this year. The result has been people fleeing airline travel and anything related in unprecedented numbers. Airlines around the globe reacted by parking thousands of airplanes and furloughing employees as demand dropped to rock bottom levels. Thousands of others lost their jobs as commercial aircraft production nearly ground to a halt with the fallout moving downstream tearing the hearts out of many industry suppliers as it went. And all this in addition to the grounding of Boeing’s 737 Max back in March of 2019.
The much hoped-for follow-on aid from the US government recommended by economists on both sides of the aisle never materialized once paycheck protection funding ran out. Except for the stock market, the US economy sank into the worst recession since the Great Depression with food banks overwhelmed by the millions of other Americans out of work. Congress, at each other’s throats most of this year failed to be of much help. First-line health care workers, noble enough to risk their lives to help back in March, are now exhausted with no relief in sight.
Within a few months of the virus’ emergence, the commercial airlines made their best efforts to trim transmission by demanding everyone who did fly should wear a mask. The FAA decided such a rule was beyond the scope of their mandate. Interestingly hundreds of people have been permanently banned from some US airlines for refusing to don a mask claiming their right to personal freedom trumped any airline or public health demands.
Business and general aviation picked up some of the travel slack this year as people wealthy enough to use private aviation switched to a sector where they had better control over the potential transmission of a virus that is currently killing between 1,500 and 2,000 Americans each and every day. But without a permanent solution, like a vaccine, or something to absolutely convince people it’s once again safe to climb onboard a commercial airplane, the airlines and the rest of the industry are expected to spend years digging their way out of the billions of dollars in losses they’ve already experienced. (more…)