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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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AvWeek’s Biz Av Lady on Vacation
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My thanks to AvWeek’s Benet Wilson for allowing me a little space on her blog while she was out on vacation. I’ll try and coax her to write something for Jetwhine.
Rob
GUEST POST: Business Aviation Is Still a Secret
Posted by Benet Wilson at 7/17/2009 10:14 AM CDT
Editor’s Note: On the last day of my vacation, we end the week with our good friend Rob Mark, editor of the award-winning aviation blog Jetwhine.com. He was recently named the Aerospace Journalist of the Year for business aviation at the 2009 Paris Air Show. Mark is a contributing editor to Aviation International News and Business Jet Traveler and co-host of the popular aviation podcast, Airplane Geeks..
In what little spare time he has left, Rob serves as CEO of CommAvia, an Evanston-IL based marketing communications agency focused on the aviation industry. He’s also an adjunct faculty member at Northwestern University’s Medill School of Journalism.
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Despite plenty of publicity in the past 9 months – most of it bad – than any single industry wants or needs in a lifetime, the true nature of business aviation remains a mystery to most people outside our industry.
Sure, there are a few individuals and organizations working together – like NBAA’s Ed Bolen and LaBov and Beyond’s Barry LaBov on Fox the other day – to nourish the true story of business and general aviation’s importance, not only as a viable method of transportation, but also as an authentic job machine like the one needed to put America back on the road to a working economic recovery.
On my part, I was lucky enough to win an award in Paris last month for a story about what the dum-dums from the auto manufacturers (notice no one calls them Big Three any longer) should have said to the press about their use of business airplanes to visit Congress. Let’s face it though. Taking that big iron to DC looked wasteful to most of us. Is it any wonder people quickly tagged biz av as the poster child for excess at a time when tens of thousands of average folks were losing their jobs?
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Students Control Flight Training’s Costs
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Several days ago a JetWhine reader, James, emailed this question: How much does recreational flight school cost in Michigan? What things should I be considering before going ahead?
No matter where you live, calculating the cost of learning to fly with any accuracy is impossible because the equation is filled with variables that multiply the fixed costs of aircraft rental and instructor fees. The good news is that students can control these costs by mastering the variables.
This control applies regardless of the pilot certificate you seek–sport, recreational, or private pilot–or aircraft you wish to fly, fixed-wing, rotorcraft, trike, or powered parachute. And it’s true whether you’re seeking initial training or a more advanced rating or certificate.
Frequency, how often you fly, is the critical factor. Learning to fly is a process of melding unfamiliar knowledge and skills in a noisy, three-dimensional classroom. It’s a building-block process where you add one skill to the next, and how quickly you master them depends on how much time passes between one lesson and the next.
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Cute as a Button for AirVenture 2009
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Some folks really believe that the hit of this month’s AirVenture is going to be the arrival of the Airbus A380 at AeroShell Square. And no, the big deal this year is not going to be EAA’s director of public relations Dick Knapinski dancing the Macarena at Theatre in the Woods … at least I don’t think so.
Nope, the big act this year will be the arrival of this little fellow – or maybe it’s a girl. We just call it Jet “Whiner” for now. More on that in a bit.
The idea for a Jetwhine mascot actually came from a reader, Ryan Keough at Cutter Aviation in Phoenix. Keough is the voice behind the social media efforts at Cutter and the guy I credit with giving me my start on Twitter at @jetwhine. He was waxing poetic about how much he enjoyed Jetwhine and I of course, was loving it all. He mentioned he enjoyed being a whiner and I thanked him.
It probably took a few days, but the idea of being a whiner kind of stuck with me. I connected up with my graphic design and illustrator buddy Ken Smith – @artistmac for you Twitter types – and this little guy, girl … well thing began to take shape. And the rest is history. Or as the French say … “voila!”
There are already a number of noteworthy individuals in possession of this coveted “Jetwhiner” emblem, especially since we turned it into a button. And friends of Jetwhine who make it to AirVenture this year will have their chance to take a few of these little babies back with them. Find me on Twitter at @jetwhine, or drop me an e-mail and we’ll connect up.
Or …