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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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Remembering My First Airplane Ride
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Bell 47 Do you remember your first flight? I know I do. That image of a 12-year-old me climbing into the right seat of an old Bell 47 helicopter at Greater Rockford Airport in 1963 is indelibly etched into my brain. I even remember the pilot’s name, Rick. Actually, he called himself Captain Rick.
The other night on the Airplane Geeks podcast I listened as my co-host and master storyteller Micah Engber told us about his first trip aloft, as only Micah can. He said he was 13 at the time.
Micah shared his story in two forms. Read the copy below or click on the podcast player above to listen to the audio of his story. Readers along the eastern seaboard may recognize Micah from the stories he’s presented through Maine Public Radio, the area’s NPR outlet as well as the Airplane Geeks.
But don’t be too hard on Micah for that snappy picture of himself in the tux, ready to head out to a high school prom. It was all he had from that era. I’ll bet most of us guys have one similar.
And BTW, If you have a first flight story of your own, why not share it with us in the comments below or e-mail it to me at [email protected]
Rob Mark, publisher
Remembering My First Flight
By Micah Engber
As we record today, on August 26, 2024, it’s the 55th anniversary of my first flight ever. Now back in 2013 on Episode 238, this story was the very first piece I ever submitted to the Airplane Geeks, but based on this emerald anniversary, I thought it might be time for a retelling, live this time, and with a few updates and revisions based on a little research I’ve been able to do over the 11 years since its first airing. So here it is, warts and all.
But before we go any further, I need to tell you a little bit about my family. Many listeners know of my mother, Harriet, who left us a bit over a dozen years ago as an octogenarian Airplane Geek, but this story involves my paternal grandfather.
My Grandpa Max lied about his age to join the Navy. The Navy believed he was born in 1896. Being that his government birth records were destroyed in a fire many years before his death, and he lied about his birth year for so long, even he wasn’t sure of the truth. No one ever knew if he was really born in 1896, 1897, or 1898.
We don’t know what year he joined the Navy but we do know he was so small and skinny at the time, that the recruiting NCO weighed him in, turned him down, and then sent him away with a nickel telling him to go down the street and buy a quart of milk and a hand of bananas. He was instructed to eat and drink it all, and come back to be weighed again. Grandpa Max dutifully followed his first orders.
He said that part of his Navy training included sailing the square rigged USS Constellation, built in 1854, to her final resting point in Baltimore. He was part of the Mexican Campaign in 1914 serving on board the USS Celtic off the coast of Vera Cruz. In 1916 as a water tender on board the Armored Cruiser USS Tennessee, later rechristened Memphis, he sailed down the east coast of South America, through the Straights of Magellan, up the West Coast and through the then new Panama Canal. During World War I he was assigned to four piper destroyers in the North Atlantic.
While not a submariner at one point he was onboard a submarine during a test dive (probably an O, R or S class boat, he couldn’t remember). He said he wasn’t bothered by the close quarters, as he always served in an engine room, but it was one of the only times he was really worried while on board a Naval vessel, he just wanted to know they would definitely be able to surface.
After leaving the Navy Grandpa Max joined the Merchant Marine but came shore-side permanently when he married Grandma Sadie. He worked for the US Customs Service until he retired a bit less than a year before I was born. As I hope you can see my Grandpa Max was one tough old salt. (more…)