-
Making the Brazilian ATR-72 Spin
by
No Comments
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
No Comments
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…)
-
Did the blogs do it?
by
No Comments
Although there are plenty of skeptics who still think blogs, podcasts and Word of Mouth advertising are a huge waste of time, these new communications tactics are changing the way people think and at a rate faster than almost anyone can keep up with.
Have you seen the redesigned elements of the Eclipse 500 VLJ? I’m not a company insider, but I certainly wonder how much of the redesign would have happened if the Eclipse Critic blog had not begun to field hundreds of comments about the aircraft.
Regardless of where you stood, look at the people around the globe who took part in talking to the Brazilian government, some through this blog and many others through letters, e-mails, radio and TV shows and other mailing lists, some focusing on the need to release the two U.S. pilots others demanding they be held. And even the government the operates the Brazilian Air Traffic Control system, right up to the President, has had to admit the system there is in chaos. (more…)
-
Chicken or the Egg?
by
No Comments
I’m finishing up a new McGraw Hill book, a Professional Pilot Career Guide. The workload is heavy, but the research has been eye-opening, especially in light of the changes to the aviation industry since 9/11.
The good news is that job opportunities for pilots are expanding at a rapid rate, many even outside the United States.
Something that really caught me cold though was my look at flight instruction, a piece of the industry that I hold near and dear. I’ve managed to keep my instructor certificates current since I picked the first one up in 1975.
Back in the old days, flight instructors were lucky to earn a few bucks per hour on top of aircraft rental rates that hovered around the $25 per hour.
Today aircraft rental rates are easily five or six times as high. More importantly, the amount of money flight schools charge for the teacher has zoomed as well with some adding $50 ot $60 to each flight hour for an instructor’s time.
What I found absolutely amazing is that although the instructor’s gross revenue numbers look much better than 30 years ago, the net to the pilot has not changed much.
There’s something wrong with that. (more…)
-
They’re out!
by
No Comments
The aircraft carrying U.S. pilots Joe LePore and Jan Paladino has left Brazilian airspace on its way back to the states. Welcome back guys.