-
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…)
-
One Cessna Skycatcher Please, Easy on the Soy
by
[sc name=”post_comments” ][/sc]
The most surprising aspect of Cessna’s decision to build its new model 162 Skycatcher in China is that anyone was at all surprised by the move. Now comes word that some people are
shocked, shocked enough, in fact, that they might want their deposits back.
Cessna’s Skycatcher blog recently found itself battered by a number of very unpleasant comments, some significantly loathsome enough that the company halted the posting of any fresh letters for a bit. As a side note, see Jetwhine’s “Rules of Engagement,” and you’ll notice that most blogs expect a certain amount of civility from posters.
That said, I’d encourage Jack Pelton and the Cessna board not to fret too much about the unpleasant comments they’ve seen. Take out the rude questions for certain, but continue to dialogue with customers. Initiating and maintaining a conversation is the fuel for the new social networking revolution that – like it or not – as the Honeymooners Ralph Kramden used to say is, “The wave of the future.”
-
Environmentally Friendly Airplane Takes Flight
by
[sc name=”post_comments” ][/sc]
I hope the folks in airplane towns like Wichita, Seattle and Duluth are prepared for what looks to be quite a few sleepless nights now that the world’s first flying machine constructed totally from recyclable materials has flown.
Built in a clandestine factory by aircraft designer Carl Rankin – the ecologically advanced Jules Verne as Rankin calls it – was recently flown from a top secret airfield to avoid the scrutiny of a skeptical press corp, except of course for the Boing, Boing TV folks. The Internet TV crew had been staking out the location for weeks in anticipation of the flight.
Watch closely as Rankin explains the intricacies of his design to reporter Xeni Jardin. And you’ll also find a few new ways of making a little bread attached at the end.
-
They Once Called Airline Food Cuisine
by
[sc name=”post_comments” ][/sc]
It may be difficult to imagine, but the airline industry was not always the focus of the intense scorn we see today. And as I dug a bit for this story, I found that those glory days of aviation – golden might be a stretch I think – were not so long ago. People used to dress up to fly on an airliner. They actually had … fun too.
On to a little airline history.
What airline used to serve Sauerkraut Balls as part of the luncheon between San Francisco and Chicago?
And who offered Chicken Korma and Vanilla Bavoris between Tokyo and Hong Kong or Poached Medallion of Salmon with salmon mousse enroute between Moscow and London?
Not really a quiz is it if I give you the answer is it? Stop over to Northwestern University’s Transportation Center site for a quick look at a little menu history.
NU also has an incredible transportation library that is part of the larger Northwestern University Library system.
Since anyone can garner access online now, I’ve been able to spend more time wandering the shelves, so to speak, from behind my desk.
The library has improved quite a bit since I was a graduate student at NU, or maybe it’s just easier for me to find things. Hard to tell.
But I am glad that someone took the time to save these emblems of a bygone era in our industry. Still, there is this nagging question in my brain … what IS Vanilla Bavoris anyway?