-
Making the Brazilian ATR-72 Spin
by
[sc name=”post_comments” ][/sc]
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…)
-
How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
by
[sc name=”post_comments” ][/sc]
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…)
-
BlogFest @ AirVenture: The Ideas Flowed
by
[sc name=”post_comments” ][/sc]
From AirVenture 2008 – Five minutes before the blog session began at AirVenture yesterday, I was wondering if the whole thing had been such a good idea. There were five people in the room. Maybe it was too soon to talk social media.
Then, as the clock struck four, people began arriving. Soon the crowd had grown to a few dozen, some from the traditional print media, other bloggers, academics and even a few from the aircraft manufacturing sector all curious about the value of social media for sure.
Then there was the eternal question about the meaning of the acronym BLOG, which one of my cohorts yesterday, Rod Rakic from MyTransponder.com, said stands for “Better Listings On Google. I can live with that.
-
On The Record: Making Aviation More Social
by
[sc name=”post_comments” ][/sc]
From AirVenture 2008 – There’s nothing quite like meeting up with a bunch of pilot buddies on a Saturday morning for a great breakfast. The social aspect of flying, in fact, is one of the best ways for newer pilots to learn from more experienced aviators.
In PR lingo, that’s called sharing tribal knowledge and is worth more to the industry than many often would like to admit because aviators talking about what they do and how they do it is how the new folks learn how and where to fly, for instance, as well as more about what airplanes and headsets to purchase. In the sales world, this is called personal referrals and is what every company lives for.
However … flying – in fact most of aviation – can be a tough sport/hobby/passion/profession to break into if you don’t already know someone who belongs to the club. Take a look at the barbed wires fences and the “Keep Out” signs posted around most airports for a bit more on why many never get that close.
-
EAA AirVenture Forums is Where Flying Friendships Form
by
[sc name=”post_comments” ][/sc]
Six months out of the Navy I attended my first trip to Oshkosh in 1978. I went for the airplanes. Not one of them now stands out in memory. Not so with the people I met. Sitting in side-by-side booths in the old exhibit shed were Pappy Boyington of AVG Flying Tiger and VMF-214 “Black Sheep Squadron” fame and Ensign George Gay, VT-8’s only survivor during the Battle of Midway.
Both were selling books I’d already read, Baa Baa Black Sheep and Sole Survivor. That I could meet and talk with these aviators at Oshkosh, and listen to them recount their experiences in forum tent talks took me by surprise. Such unexpected encounters is what has drawn me to EAA AirVenture every year since. This year, my 31st, is no different.
Few of the people I’ve met over the decades are aviation celebrities like Boyington and Gay. Most of them are like me, ordinary people interested in airplanes. Many of them have become friends, and I’ve learned something from each of them. We connect each year at Oshkosh, and during the week I’ll introduce you to some of them here in JetWhine.com.
AirVenture forums is where I’ve made most of my new friends. Even for the shy, starting a conversation is easy because everyone there shares an interest in the topic presented. Over the past decade I’ve also had the opportunity to present some forums, another excellent way to turn strangers into friends, which is why I’m eagerly anticipating this year’s Aviation Blog forum, Monday, July 28 at 4 p.m. in the GAMA Pavilion (No. 2). I hope to see you there. — Scott Spangler