-
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…)
-
Insanity and the DOT Pilot Shortage Solution
by
[sc name=”post_comments” ][/sc]
As most sentient people know, insanity is doing the same thing over and over again and expecting different results. Or maybe it is just laziness because developing a new, more efficient way of educating pilots is too much time, effort, and money. When it comes to evening out the pilot shortage cycles, it is much easier and economical to put a new name on a century of tradition unimpeded by progress.
That’s what Secretary of Transportation Elaine Chao did in announcing the department’s Forces to Flyer Initiative that will explore ways “to address this pilot shortage, and ensure our nation continues to be a world leader in aviation.” This three-year demonstration program has two objectives: to learn how interested veterans might be in becoming commercial pilots, and to help train those who are not already pilots.
That last part is where the insanity comes in. The program will provide financial support to veterans to earn their CFI. “As many of you know,” said Chao, “flight instructors can use their paid time to earn hours toward their airline transport pilot certificate.” Clearly, she doesn’t know or hasn’t talked to a flight instructor, ever. She probably thinks that the average flight instructor earns enough to keep a roof over their heads and food in their bellies by teaching alone, and that they are so busy that they’ll log the ticket-punching 1,500 hours in less than a year. Never mind that 1,500 hours in GA aircraft offers little preparation to fly an airliner of any size.
For those old enough to remember the GI Bill flight training benefits, see the definition of insanity. Such programs rarely last long enough for a good number of vets to complete training because politicians with short memories want to spend the flight training money on something more important to them and their campaign benefactors. For everyone else, consider the aviation tradition of “paying your dues” as a CFI and working your way up. It worked when aviation was in its infancy, but it no longer meets the needs of 21st century aerospace. But the people who own, operate, and invest in airlines like it because it saves them a lot of money that they skim off the bottom line as bonuses and dividends…until they don’t have enough trained people to drive their winged buses, but that only happens every decade or two.
If government rule makers were really interested in bringing pilot training and certification up to date, they should take a lesson from the performance based navigation system of requirements that is making flight from Point A to B more efficient. Performance based pilot certification would not be based on an arbitrary number of hours, like 1,500, but rather of each pilot’s demonstrated ability to meet the requirements of a particular type of flying in a particular type of aircraft.
Performance based pilot training sure seems to work for the military, which updates the performance parameters with the current and coming technology and equipment. And from their first flight pilots learn to fly so they can meet their ultimate performance requirements. Student naval aviators, for example, learn that pitch determines speed and power controls altitude, and flaring to land doesn’t work on an aircraft carrier. And as they meet the performance requirements at each stage of training, they will have logged about 200 hours, give or take, when they make their first trap.
This is a case where a tradition is the source of progress. but making this change in civilian flight training might just be too much to hope for because bottom-line interests of those who will support the education of the pilots they need are more important than progress. — Scott Spangler, Editor
-
Theodor Knacke & Parachute Appreciation
by
[sc name=”post_comments” ][/sc]
If the name Theodor Knacke means nothing to you, don’t feel bad. It meant nothing to me, until last week when I learned about the man and his lifetime contributions to the field of aerodynamic decelerator systems, also known as parachutes. Many people in aviation only think about—and appreciate—the parachute if it is the only thing that will prevent a sudden stop after long fall. But just think, where would the space program be without the parachute, and the uncountable thousands whose lives have been saved by this seemingly simple device? And let’s not forget those who fling themselves from high places for fun.
When looking at the details involved, designing a decelerator system is one of aviation’s premier engineering challenges. Working with a variety of sewn together textiles an engineer must create an aerodynamic system that reliably assembles itself in midair. Sounds simple, doesn’t it? Let’s consider the parachute used in an F-18. It must fully deploy so an aviator does not come to a sudden stop after ejecting at zero speed and zero altitude. At the other end of its performance spectrum, the parachute must assemble itself in such a sequence that it does not self-destruct when it unfolds at 40,000 feet in a Mach number slipstream. And just to make it interesting, the parachute must be packed and hydraulically mashed into a solid textile brick that is wedged into the top of a seat under a canopy where the brick bakes on sunny days, freezes at altitude, is bathed it corrosive salt sea air for months and months and months.
And the engineer who wrote the book—literally—on meeting this daunting engineering challenge? Theodor Wilhelm Knacke. Don’t bother looking him up on Wikipedia. He doesn’t exist there. But he should, because among his many accomplishments is his compilation of all he’d learned about the field in Parachute Recovery Systems Design Manual. The photos on its cover depict some of the projects on which he worked. That effort began in 1930s at Flugtechnisches Institute Stuttgart (or Flight Institute of Stuttgart Technical University, FIST), which challenged him and a colleague, Georg Madelung “to develop a parachute suitable for the in-flight and landing deceleration of aircraft.” Their solution was the ribbon parachute, which led to the ring slot and ring sail parachutes that made “31 successful earth landings” of Mercury, Gemini, and Apollo spacecraft.
-
Veterans Day as a Time to Reflect
by
[sc name=”post_comments” ][/sc]
Veterans Day as a Time to Reflect
Funny how another person can make you think differently about something you thought you already understood. For me it’s my time in the military, the U.S. Air Force in the 1960s to be precise.
When Jetwhine contributor Micah Engber mentioned a Veteran’s Day podcast a few months back, I wondered why. He’d never served. But his idea for telling a unique story kept bugging me until I realized here was a non-vet with something to share and me, a real vet … I had nothing.
It took me awhile to come to grips with my issues. Turned out I’m pretty burned out on all the sloppy love people seem to have for vets these days, tossing around “Thanks you for your service,” and sticking “we support our troops” on the butt end of their cars as if that alone makes a difference. President after president seems not to understand that we all too often forget about these men and women once they come back stateside … the one time when Americans could actually put their money where their mouthes and their stickers are. It’s the insincerity of it all that makes me want to scream at times. Could it be worse, sure. When I left the Air Force in the 70s, people were generally indifferent to service men and women.
But listening to Micah’s stories of his grandfather and dad made me realize the two great wars taught him things in a way I never experienced. My dad wasn’t a vet. I don’t fault him for that since he had a hearing problem from the time he was a kid. But it meant there was no one in my family to hear stories from or ask questions of.
I think Micah grew up listening to those stories, but actually grew up as he listened. He grew when he asked the questions others thought he should have left alone. After this seven minute piece, I realized I was envious of Micah. While I’m glad he had that time with the guys in his family, I wished I’d been able to share the same thoughts with my family and people who wanted to know more. Maybe I will some day. Until then, have a peaceful Veterans Day.
Rob Mark, publisher
Veterans Day (script)
Here in the USA Veteran’s Day used to be called Armistice Day. It celebrated the end of World War I. We celebrate it on November 11 as the treaty between the Allies and Germany was signed at Compiègne, France on the “eleventh hour of the eleventh day of the eleventh month” of 1918. If I understand it correctly, this same day is celebrated in Britain and the Commonwealth countries as Remembrance Day. A far more dignified and appropriate name. As usual here in the USA we changed the nature of the celebration and have turned it into something else completely, but at least we haven’t changed it to a “Monday Holiday” well, not yet anyway.
I grew up with a great respect for Armistice Day in my house. My grandfather, Grandpa Max, served in the US Navy in World War I, and during the Mexican Campaign before that. Some listeners may remember that he and I shared our first ever flights together in August of 1969, he at the age of 73, me at 13.
My father, Lew, was a World War II veteran of the US Army and was a called back to The US Air Force as a retread for Korea. He was rightfully very proud of his service, and I was, and still am quite proud of him as my Dad. He was part of that group of people called “the greatest generation” by newscaster Tom Brokaw, so were most of my mother and father’s friends and family. I was raised by this generation, as well as the generation before, that fought World War I.
As part of “The Greatest Generation” at the age of 18 he was drafted out of his engineering studies at CCNY and landed in England on his 19’th birthday. He would have been one of the first to land on Omaha Beach during D-Day but looking back on it, I suppose he was fortunate to have been injured during the preparations for that invasion; suffering with both head and back trauma that plagued him the rest of his life, fortunately though, it did keep him off the beach that day. I’m not sure I would be here if he weren’t injured then. Those injuries didn’t keep him out of the war though.
After the war, Lew went back to college, but having spent so much time building and destroying bridges in the Army Corp of Engineers, he realized engineering was no longer his passion and he became a psychologist. I suppose in some ways this made him more valuable to the Armed Forces as when he was again drafted, this time as a “re-tread” for the Korean War; he was inducted as a Second Lieutenant for the then newly formed US Air Force Medical Corp. After being introduced by mutual friends, in the summer of 1955 Lew and my mother Harriet were married, I came along a little over a year later.
Now growing up my Dad and I would watch many World War II films together. Some we saw in theatres, some we saw on TV, all of them we would watch together over and over.
While watching those films with my Dad I would ask him questions, questions about his service, about his experience in the war, questions I didn’t know you weren’t supposed to ask. My Dad, being a teacher and a psychologist didn’t discourage me, he knew they were innocent questions and used those times to teach me and tell me about his experiences, as much as he could anyway. I suppose he realized that talking to me about him “having seen the elephant” was good for both of us.
He also taught me the etiquette about asking so I’d have a better understanding of veterans. I think watching those films with my Dad, and him teaching me about “The War” helped give me a great respect for our military and the sacrifices they made, and continue to make to this day, in defending we civilians.
Thinking back on that makes me think of the word hero and its definition. No, I’m not talking about the sandwich, something I also learned about from my Dad and “the greatest generation”, I’m speaking of the men, and yes, based on the societal norms of the time, most often men, who risked their own lives to save others.
You see heroes aren’t sports figures or actors or singers. Celebrities aren’t heroes, unless the heroism didn’t come from their celebrity status. Heroes are the people doing their job, not thinking or maybe at the time not caring about their own safety, when they act to save the lives of others. Most heroes aren’t celebrities and don’t look for nor want that status. Heroes walk among us though, and most often, we unfortunately don’t know them. In truth, they probably wouldn’t want to be known, as they don’t think of themselves as heroes. Most would say, I was just doing my job, and to me, that’s what makes them heroes.
Now although my father probably wasn’t a hero to anyone but me, let me tell you what may be an apocryphal story about him. While I was growing up, he owned a 1914 32ACP German Mauser handgun that he captured during the war. I asked him how he got it and he explained that it was all a big mistake.
You see it was after VE Day and Dad was still overseas. He was somewhere along the Belgium Luxembourg German border. Things were safe and he was out at a local pub, “drunk as a skunk” he would say.
He didn’t know much German but while overhearing a conversation at the next table he was sure he strung together enough to know that a German Colonel had not surrendered and was hiding out in a house in the local village.
My drunken father dutifully went to report this to his commanding officer, who was not pleased. The CO could see my Dad was drunk, and knew he didn’t speak any German. The commanding officer sent him to his barracks and ignored him. Not to be ignored Lew stormed back into the duty office and insisted that they needed to go to the address he had, and arrest this German Colonel. This time my Dad was sent back to his barracks escorted by MP’s who stripped him down to his skivvies and put him to bed.
Still not thwarted my father returned to his CO and insisted he had to go arrest this Colonel. The CO must have been some understanding kind of guy and didn’t throw my drunken father in the brig, but took him and a couple of MP’s to this house to prove that there was no German Colonel hiding out in this fully cleared area.
They entered the house and sure enough, there was a German officer hiding out there, he was at the top of the stairs and drew his side-arm, a 1914 32ACP German Mauser, and started firing down at my Dad, the two MP’s and their CO. Lew, still being, drunk thought to himself, “somebody has to get that gun” and went charging up the stairs to take it away. The German Colonel, either stunned at this stupidity, or out of ammunition, we’ll never know, stopped shooting and my father seized his weapon.
Stupidity, drunkenness, heroism, maybe bit of all of that, but when my Dad after telling that story in his joking, good natured and raconteurial manner, was asked why he didn’t get a medal, he would say he was just lucky he didn’t end up in the brig and lose his good conduct ribbon. You see my father may have been a hero to me for various reasons, that being one of them, but it’s not the prima facie basis of it.
It does make me think though of other heroes. There’s a former US Air Force pilot I know, who among other duties during his service, was a flight instructor. He wasn’t just any flight instructor though, he would instruct many pilots about to wash out, and was usually able to get them back on track and into the sky, making real USAF pilots out of them.
Then there’s this former RAF pilot I know, who also among other things during his service, would hear a klaxon alarm and hop into his F-4 Phantom II and run off to chase down and intercept Russian Bear Bombers. He’d show them we were ever ready and not going to be surprised by them.
Through their service, both these pilots helped in keeping a Cold War from going hot, and creating the kind of heroes that most often come to mind when we think of Veteran’s or Remembrance Day.
So as a civilian with a great respect for those who serve in our military, I want to extend my thanks to all of you who did and do serve there. Thanks for keeping us safe, thanks for just doing your job.
For Jetwhine, here in Portland, Maine
This is your Main(e) man,
Micah