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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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Playing Jeopardy with Aviation’s Future
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That Future of Flight Training session at AirVenture a few weeks ago left me feeling pretty cranky … whiny even. Not because of the session itself. All the folks on the panel, including moderator Greg Laslo, couldn’t have been nicer.
But we all walked away from the discussion with the same thought … now what? Considering the lousy turnout, as Scott Spangler mentioned last week, I left wondering how anything we spoke about could in any way affect how the management types view flight training or its foundational position within the industry?
So here’s an idea, let’s not make the argument for flight training any longer.
Let’s focus the light where it really needs to be, on the Big Picture, where everyone claims they’re looking anyway.
Without pilots, there is no aviation industry, period. No Part 135 charter, no corporate flight departments, no sightseeing flights and most of all, no airlines … nothing.
We need to stop pussy footing around trying to grab a few new students here and there to fly our shiny new Cessnas, and Cirrus SR-22s and Piper Warriors. Let’s be serious, none of the previous incarnations of any Learn-to-Fly programs have ever come even close to returning us to the old days when 17,000 new airplanes were delivered in a year and a commensurate number of pilot starts kept the Government Printing Office in business producing student pilot certificates. We’re all so focused on Learn-to-Fly though as the solution as if the only audience we need to succeed with are those potential customers for flight schools.
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Electric Aircraft & Air Show Possibilities
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On many levels the 2010 Electric Aircraft World Symposium was a surprise. Sponsored by GE Aviation and held at the EAA museum on AirVenture Friday, I expected a geek fest with a small audience of a hundred or less, because that’s the space available in the Founder’s Wing, the symposium’s original location. But when I hoofed my way to the museum, I saw Kermit Week’s Mosquito parked outside. Being an old all-wood airplane, I’ve never seen EAA do that before. The reason, I soon discovered, is that three or four times as many people had signed up, so they moved all the airplanes out of the Eagle Hangar (except for the XP-51), to make room for everyone.
The symposium delivered on my geek-fest expectations. Sitting at one of the round tables up front, three engineers networked and shared highlights of their careers and their most challenging projects. The agenda for the day-long event essentially followed the same path, with speakers from GE Aviation, Sikorsky Innovations, Tesla Motors, NASA, and electric aircraft builders including John Monnett and Pete Buck, the driving force behind Sonex e-Flight Initiative. Batteries were the primary topic of discussion, and Bertrand Piccard and Solar Impulse pilot Andre Borschberg talked about their project and the historic overnight flight of its photovoltaic flying machine that has a circumnavigation dream.
While the technical information was interesting, a good primer on a field that grows ever more important with time, the keynote speaker, Burt Rutan, started with what we might see in Electric Flight: The Next 10 Years. Yes, he said, electric flight is now impractical, “but you have to start someplace.” To see where it first might deliver a commercial application, he suggested a YouTube search for 3D flight, what pilots flying electric RC models call fixed-wing hovering and stationary rolls made possible when an airplane has more power than weight.
Noting that he’d been coming to Oshkosh forever, Rutan said he stopped watching the daily air shows decades ago because they are loud, boring, and repetitive, with all the performers doing the same maneuvers in different combinations. (I’m right there with you, Burt.) Just imagine, he said, spinning the dream, of aerobats flying silent 3D performances in scaled-up electric powered airplanes, like those seen on YouTube. “That is,” Burt said, nodding toward FAA Administrator Randy Babbit, who welcomed the symposium participants and said the FAA was a willing partner in the e-flight effort, “if Randy will let us do it.”
It’s my guess that 3D airplane flight will fly with the FAA long before 3D helicopter demos, another YouTube look at the future. Sustained inverted flight and other maneuvers must make the Red Bull aerobatic helo jealous, and it gives the team at Sikorsky Innovations something to shoot for, and I can’t wait! — Scott Spangler
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Does the Aviation Industry Really Care About Pilot Population Growth?
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Given the underwhelming participation at an 1130 panel discussion about the subject the Saturday of AirVenture Oshkosh, the general answer must be a big, boldfaced NO.
For the discussion of How to Grow the Pilot Population, just seven of the nearly 100 seats in the Learn to Fly Discovery Center’s presentation area were occupied, by 2.5 reporters and 3.5 independent flight instructors (JetWhine Editor Rob Mark was, as usual, the multitasker). The National Association of Flight Instructors organized the panel, and its chairman, Ken Hoffman, completed the audience.
Some industry members proved that they truly care about pilot population growth by participating in the panel. The moderator, NAFI Mentor Editor Greg Laslo, introduced them from the audience’s left to right:
Julie Filucci, a long-time CFI, manages the Cessna Pilot Center program, and she handed out a friendly, informative learn-to-fly booklet, You Were Never Destined to be a Passenger. With more than three decades in the flight training industry, Bob Anderson manages the Remos Aircraft Sport Pilot Center program. Jennifer Storm is AOPA’s director of public relations—and a flight instructor. Eric Radtke is president (and chief flight instructor) of Sporty’s Academy. And Jason Blair, NAFI’s executive director, is a CFI, designated pilot examiner, and flight school owner. (more…)