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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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USAF Museum: Thanks For Your Service
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Standing at the bent and battered nose of a Vietnam-era C-123 Provider at the National Museum of the US Air Force and wondering why there was a World War II P-47 Thunderbolt snuggled under its left wing, a middle-aged blonde walked up, looked at the airplane, and said, to no one in particular, something about “their achievements.” Then she turned to me, because I was the only one there, and asked, “Did you serve?” My affirmative reply was followed by today’s autonomic honorific, “Thanks for your service.” And then she was gone.
This brief interaction—it lasted less than a minute—shaped what remained of my day-long dedicated exploration of the museum. It should be clear that I really don’t like people thanking me for my service. It implies that I’m someone special. As those who know me will attest, I’m far from it. In early 1972 I joined the Navy because I had a low draft number and was racing the postal service. Before and after the draft, military service is a choice. I could have decided to resist or run north, but I decided to enlist because my future then pointed to no specific goal.
Really, applying for a job in the military doesn’t make anyone special. But circumstances related to the performance of that job, going above and beyond the call of duty, qualify, to a degree. All of those I’ve talked to who have made this effort agree that they are not special. They were just doing their best to accomplish the mission they signed up to do—and not die, or let anyone they are responsible for die, in the process. That was the goal, not the glory that followed.
But elsewhere in the museum is a tribute to a group of men who are special. Each of their names is engraved on a silver goblet. Logic suggests that every man who volunteered for Doolittle’s mission to bomb Tokyo had to know in their hearts that launching a B-25 from the USS Hornet was pretty much a one-way adventure. Someone who volunteers for that job, knowing that more than likely it would be the last thing they ever do…that person is special and deserves our thanks for his courage and his service.
Taking time to read the signs explaining the goblets, I learned that they are organized by crew, identified by the pilot, with the others in the column below. Richard Cole, Doolittle’s copilot, made the case in 1973. Now 102, he is the sole survivor of the Doolittle Mission. His goblet stands next to the cognac. On the other side is the inverted goblet of the penultimate survivor, David Thatcher, the gunner on Ted Lawson’s crew. Cole drank a final toast to him and the other 78 members whose goblets stand mouth down in the velvet-lined case in 2016, on the 75 anniversary of the mission.
Yeah, the rest of us who served anonymously, we’re not special. You want special? Bring back the draft so everyone, male and female, has skin in the game, and let’s see who gets thanked for their service. One wonders, if every mother’s son and daughter faced the possibility of serving their nation—with a chance of dying for it in the process—would everyone be so thankful, especially to those responsible for our decades of armed conflict?
Coming across the new Memphis Belle display diverted my gloomy train of thought, and it explained why there was a P-47 under the wing of the C-123. The museum staff cleared out a lot of airplanes to make room for the Belle, and they haven’t yet finished rearranging the space yet. And you can’t just park such historic artifacts outside, can you? My hat’s off to the curators who created the display and putting the airplane on up on its jack points was genius! Being able to look into the open bomb bay makes a subtle point of the airplane’s purpose, and looking up at the crew positions puts their service in the proper perspective. — Scott Spangler, Editor
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A Unique Around-the-World Journey Heads East
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A Unique Around-the-World Journey Heads East
As you read this story, Mason Andrews should be winging his way eastward out of Italy toward Croatia while sitting in the left seat of his dad’s Piper Lance (a link to the full podcast is at the bottom of this story).
Andrews was one very lucky young man when he asked his dad to borrow the airplane for a trip and received a thumbs up. OK, that’s not completely accurate unless you understand the context, that the senior Andrews did actually express a few reservations when young Mason mentioned the length of the trip … around the world.
And yes, his dad definitely raised an eyebrow when Mason told him he wanted to make the trip alone. Mason Andrews, a newly minted instrument pilot and Louisiana Tech student just recently turned 18.
When Mason Andrews completes his round-the-world trip, he should become the youngest person to complete a global trip solo. Mason wasn’t making the trip to become famous, although he likely will. The trip was actually designed to raise money for MedCamps of Louisiana to fund summer camp for kids with special needs, a summer event where Andrews also serves as a counselor.
About the Aircraft
The Piper Lance Mason will fly has been modified to carry enough fuel for legs as long as 18 hours. The Lance cruises at about 140 knots burning 13.5 gallons per hour. The first leg of the flight began last week from Republic Field on Long Island NY. The first leg took him from Republic to St. Johns Newfoundland. Mason’s flight plan includes a stop at Paris LeBourget, site of Charles Lindbergh’s arrival following his record-setting solo flight in 1927. Mason Andrews said he believes the flight’s biggest challenge will be “weather.” The Lance is much better equipped to keep him informed of the weather than Lindbergh could have ever imagined.
My EAA Radio co-host Amy Laboda and I managed to convince Mason to join us for an interview last week during our regularly scheduled “Attitude Adjustment,” show at AirVenture 2018.
One of the first things Mason mentioned the day I met him was that he was still celebrating the two-year anniversary of his first solo as a student pilot from Monticello Airport (LLQ) in Arkansas.
I think you’ll find Mason’s story worthy of 10 minutes of your time. Click here to give it a listen. You can also follow Mason’s journey on Facebook.
If you enjoyed Mason Andrews’s story, brought to you by Jetwhine.com, in collaboration with EAA Radio, we invite you to subscribe to Jetwhine.com. It’s free. You can also follow Jetwhine on Twitter @jetwhine and EAA Radio @eaaradio. Enjoy.
Rob Mark, Publisher