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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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Training & Technology’s Transitions
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The JA Air Center opened its new four-building campus, which covers 150,000 square feet, on December 1, 2008. As the airport’s primary FBO, the company had to add flight services–charter, training, and aircraft rental–to its well known menu of avionics, maintenance, modification, and aircraft sales. Seizing the opportunity to innovate, JA Flight Services used technology to integrate training and the transition from one aircraft to another.
As a Cessna dealer and service center, becoming a Cessna Pilot Center was the logical first step in setting up a flight school, said JA Air President Brad Zeman. It will be among the first to deliver the CPC’s 21st century training curriculum for initial, recurrent, and advanced training, starting with the sport pilot certificate and supported by the latest computer-based ground schooling. (See Next-Gen Challenge: Selling Aviation.)
The JA pilot center should be up and running before the first Cessna 162 SkyCatcher, a light-sport aircraft, completes the Cessna’s single-engine family on the JA flight line later this year. The common trait of this family, aside from the name, is what’s in the panel of each: glass. Garmin glass. The G1000, to be exact. Except for the 162, which has the Garmin G300, which some might call G1000-lite. Another exception is the flight line’s complex airplane: the retractable-gear Piper Arrow has Garmin G600 glass.
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Business Jet Travel: A Line in the Sand
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Remember the old days, back when people had little respect for business airplanes simply because they knew next to nothing about them? Those were the good old days until the guys from the motor companies jumped on their airplanes in Detroit to head for Washington to beg for cash. That was a PR blunder for sure.
In case you missed the whole debacle, here are a few mile markers for a quick review. Thanks to my pals at Business Jet Traveler magazine who allowed me to inject my two cents into the whole conversation. And another round of thanks to Bill Hemmer at Fox News who gave me some time – albeit a bit tongue in cheek – to debate the very idea of owning a business airplane.
My stance essentially said companies that use business airplanes as legitimate tools of the trade have been hiding those machines in the weeds so long they’ve become their own worst enemies.
While the auto industry execs trip may have evolved into a colossal PR blunder, not to mention great fodder for some of the TV networks, using those business airplanes for the trip to Washington that day was not a bad business move. Mr. Mulally, Nardelli and Wagoner used their airplanes for precisely the purpose they purchased them in the first place, swift efficient transportation for people being paid enough money to warrant the expense.
This past few weeks has seen even more logs on the fire with the feeding frenzy surrounding the CitiGroup delivery of a Dassault Falcon 7X or Starbuck’s delivery of their Gulfstream 550 as the company cuts their workforce. As I said to Bill Hemmer during our interview … if the media was hounding the execs from Detroit about what kind of computers they used or how much they cost, those execs would have told them to take a long walk off a short plank. So where are the corporate communications people? Why aren’t they out there telling the story in an attempt to balance off the negative publicity?
Because President Obama entering the discussion as he tries to crack down on the idiots in the finance industry who have given themselves huge bonuses even as they accepted TARP funds has driven the airplane users even further underground just as they need to be climbing closer to the light of day. Surely if the bankers used TARP money to buy their airplanes, people should be upset. But we don’t know that happened. It just looks like it could have.
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LSA Sales Down, but Fleet Still Growing
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Manufacturers of light-sport aircraft have not escaped the recession. According to several reports, this segment of the aviation industry has not been hit as hard as the manufacturers of heavier general aviation airplanes and the LSA fleet grew by 35 percent in 2008.
In his year-end report, Dan Johnson, chairman of the Light Aircraft Manufacturers Association, said LSA sales in 2008 were down around 20 percent. Between January 1, 2008 and the end of November, the fixed-wing LSA fleet grew from 1,118 to 1,510. “Annualizing the numbers,” he said owners should have registered 427 airplane LSAs, which works out to roughly 35 aircraft a month.
Flight Design, Johnson reports, continues to lead the field, registering 56 LSAs in the first 11 months of 2008, but Remos is gaining. Over the same period it registering 50 aircraft (like its GX, right), and its total representation in the LSA fleet has increased 147 percent since January 1, 2008. Right behind it is Tecnam, which registered 36 aircraft, making it just the third manufacturer to register more than 100 of its LSAs. Czech Aircraft Works added 31 LSAs to the fleet, Jabiru 29, and American Legend 24.
In the last days of 2008, the FA-04 Peregrine earned its LSA approval. The Hansen Air Group is the US rep for the low-wing carbon fiber bird manufactured in Germany by Flaeming Air. With Rotax 912 power, its 44-inch wide cockpit has “lots of leg room” and a good sized baggage compartment. What makes it unique among LSAs is that a certified mechanic can quickly change it from a trike to a taildragger.
What will happen this year is anyone’s guess, but it’s a good sign that most of the top manufacturers were in Sebring, Florida, for the annual LSA-only U.S. Sport Aviation Expo, which wrapped up its four-day run on January 25. Talking to Cessna’s VP of corporate communications halfway through the show, Bob Stangarone said with one or two exceptions, all the major players were among the 160 or so exhibitors, and the attendance was much better than the year before. Several new designs made their debuts, and with temps in the 70s, “there’s a lot of flying going on,” he said. Many are talking about the economy and where it might go, he said, but just as many people, if not more, are “starting the conversations that lead to orders.” —Scott Spangler