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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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Where Airline Pilots Stand in Labor Statistics
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Given the recent reports of job growth and the enduring discussions about pilot shortages, I moseyed over to the Bureau of Labor Statistics to see which occupations are ascending and which are in decline and where airline pilots show up on that spectrum.
The good news is that airline pilots are not on the list of Fastest Declining Occupations. Topping this list of 30 occupations is “fallers,” you know, the people who cut down trees. By 2022 their numbers are expected to decline 43.3 percent. And there doesn’t seem to be much future at the post office, either. Postal clerks, mail sorters/processors, mail carriers, and postmasters and mail superintendents all made the list the changes ranging from 31.8 to 24.2 percent.
The bad news is that airline pilots aren’t on the list of the 30 Fastest Growing Occupations. By 2022 the number of industrial-organizational psychologists is expected to grow by 53.4 percent. Of the remaining 29 occupations, 20 of them are in medical fields from physical and occupational therapists to nurse practitioners, audiologists, genetic counselors, and a selection of aides and assistants. Substance abuse and behavioral disorder counselors are expected to grow by 31.4 percent.
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Airmanship and the Fundamentals of Flight
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Sporty’s debut of its Cessna 172LITE Project has rightfully attracted the attention of a cannonball launched from the high dive at the deep end of the aviation pool. While most are paying attention to the splash made by the airplane’s rental affordability, what seemed most important to me were the words of general aviation’s patron saint, Hal Shevers, who said that the airplane will better enable new pilots to “learn fundamental airmanship.” There’s no denying that modern avionics technology can overwhelm new pilots, but for those born after the baby boom it also is a seductive distraction that contributes to an incomplete aviation education. Learning which button to push and what knob to turn is easier to learn—and teach—than the knowledge, awareness, and coordination that embody this thing called airmanship. In removing these distractions, the 172LITE is the perfect airmanship classroom…with the right teacher of flight. Like most professional pilots, flight instructors grew up with avionics technology and are addicted to it. They are not immune to the atrophy of airmanship abilities the FAA outlined in its cockpit automation report. Like all teachers regardless the subject, they teach what they know best. When it comes to stick and rudder education, once the student has a safe grasp of the four fundamentals, climbs, turns, straight-and-level, and descents—they move on to the the next subject in the curriculum. Plainly put, regardless the flying classroom, to teach airmanship teachers must first embody it. (more…)
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FAA Rules Alone Won’t Prevent a Drone-jet Collision
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FAA rules alone won’t prevent a drone-jet collision
By Robert P. Mark, reprinted from The Chicago Tribune, December 25, 2014
(Photo -Terrence Antonio James, Chicago Tribune) This holiday season, one of the hottest-selling toys has been the quadcopter drone, a tiny remote-controlled helicopter that carries a small video camera anyplace the ground-based operator sends it. While some of these brightly colored quads weigh less than a pound, they can still deliver a pedestrian a pretty ugly whack in the side of the head if the operator loses control.
Imagine for a moment, though, that the drone is larger, say a machine that weighs as much as 55 pounds. And imagine that instead of colliding with a pedestrian that 55-pound drone finds its way into the engine or windshield of a commercial airliner.
Remember the Canada geese that were sucked into the engines of that US Airways airplane in 2009 shortly after takeoff from LaGuardia Airport? Those geese that forced pilots Chesley “Sully” Sullenberger and Jeffrey Skiles to put their airplane down in the Hudson River weighed only 9 to 12 pounds each.
Right now, the Federal Aviation Administration is trying to develop rules that will allow commercially flown drones as heavy as 55 pounds to share the same airspace as airplanes carrying people.
This is a really bad idea, despite the fact that the FAA plans to restrict drones to altitudes less than 400 feet above the ground.
A recent AP poll, however, indicated that Americans are concerned about their safety when drones are nearby — and with good reason. Today there is no way to prevent drones from colliding with airplanes — despite the fact that modern jets are equipped with electronic systems that notify pilots when another aircraft wanders too close. Those aircraft systems can’t see drones. Technologists say that a “sense-and-avoid” system to make drones move out of the way of an approaching airplane is years from a practical rollout too.Drones are drawing so much attention these days because they represent commercial opportunities unmatchable by manned airplanes and helicopters. Law enforcement drones can stay aloft for 24 hours at a time because their computerized pilots don’t need a lunch break. Search-and-rescue drones can be dispatched in weather conditions that would keep manned aircraft grounded.
But the FAA is under tremendous pressure right now from drone manufacturers, as well as businesses that want to operate them, to do something — anything — that will allow drones access to civil airspace. Until the FAA figures out how to keep drones away from airplanes full of people, though, commercial drones are banned from the skies over the U.S.
Unfortunately, the lack of rules or FAA enforcement hasn’t stopped hundreds of drone pilots from recklessly flying their machines anyway, often incredibly close to airports and aircraft full of people. Anyone can purchase a drone and begin flying immediately. Drone operators don’t need a license, nor are they required to possess any understanding of the national airspace system they’re operating within — the same airspace where passenger-carrying aircraft are flying.
A month ago the FAA released a report highlighting nearly 200 separate safety incidents involving drones; while not all were potentially catastrophic, there were plenty of instances when drone operators either intentionally flew their machines close to airports and manned aircraft — or when drones got away from their operators and flew off for parts unknown, with no person controlling them.
In November, the pilots of two separate airliners, a Boeing 747 and a smaller Boeing 737, both on approach to New York’s John F. Kennedy International Airport, reported close calls with drones while flying over Nassau County, N.Y. Luckily the drones missed the airliners, but that cute little toy was reportedly cruising at 3,000 feet above the ground when the 747 went sailing past, traveling in the other direction.
While the FAA plans to release draft regulation about drones soon, rules alone will not prevent a midair collision. The only chance passengers have is to hope the FAA can demand enough training for drone operators before their drones take flight — enough to make those operators realize the risk they pose to everyone flying around them.
But without a training requirement for drone operators, as well as an FAA rule with enough teeth to make reckless operators realize the risks they’re putting the rest of us in, airline passengers will soon have a much greater chance of being knocked out of the sky by a drone than by a flock of passing geese.
Robert Mark is a commercial pilot and publisher of the aviation blog Jetwhine.com.